{"kind": "storage", "major": "18", "item": {"slug": "wal-internals", "name": "WAL Internals", "name_zh": "", "category": "\u7269\u7406\u7ed3\u6784", "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "aliases": [], "content_hash": "8b8d97e34edcdbc8566785dcf838a668d9c21abaad0438f81e39b71bff975a6a", "versions": {"10": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/relopts/?v=10", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v10.23/postgresql-10.23.tar.bz2", "label": "10.23", "major": "10", "channel": "stable", "revision": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "sources": [{"url": "/docs/10/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 10 English manual", "sha256": "a58d322b79c31902a0e013fefad736cad9452f36a4491f897d7d795023ec5f39"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/10/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "10", "build_id": 63, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "7c734564c2add60fdcbf5778d0127b63e81b1aa21883a7f4299f7c62670c311c", "fragment_sha256": "90dd8cd052951b08bf202dc033aeb9e225ae6a63361c9f5cb431859b98d8748b", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:62997ea80516ad012fbf6359de33f3b016b54c47e2df76e75606116b4baaf8e5", "translated_from_revision": null}, "body_sha256": "e73189e787713260a64840f4802874dcb866e382b3a44a39d7d766595c20e181", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "10", "text_hash": "d85473e2aa7dfecd9ccac0f409874a61f98077a1661f6a8b7a138579f37d784d", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/10/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "10", "build_id": 63, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "7c734564c2add60fdcbf5778d0127b63e81b1aa21883a7f4299f7c62670c311c", "fragment_sha256": "90dd8cd052951b08bf202dc033aeb9e225ae6a63361c9f5cb431859b98d8748b", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:62997ea80516ad012fbf6359de33f3b016b54c47e2df76e75606116b4baaf8e5", "translated_from_revision": null}, "body_sha256": "e73189e787713260a64840f4802874dcb866e382b3a44a39d7d766595c20e181", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u5728\u6784\u5efa\u670d\u52a1\u5668\u65f6\u901a\u8fc7\u4fee\u6539 --with-wal-segsize configure \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p> <acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/10/wal-configuration.html\">\u7b2c\u00a030.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/10/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p> <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u5728\u6784\u5efa\u670d\u52a1\u5668\u65f6\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--with-wal-segsize</code> configure \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/10/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u5728\u6784\u5efa\u670d\u52a1\u5668\u65f6\u901a\u8fc7\u4fee\u6539 --with-wal-segsize configure \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "10", "link_map": {"/zh/docs/10/wal-internals.html": "/docs/10/wal-internals.html", "/zh/docs/10/datatype-pg-lsn.html": "/docs/10/datatype-pg-lsn.html", "/zh/docs/10/wal-configuration.html": "/docs/10/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p> <acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/10/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/10/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p> <acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u5728\u6784\u5efa\u670d\u52a1\u5668\u65f6\u901a\u8fc7\u4fee\u6539\n   <code>--with-wal-segsize</code> configure \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/10/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "82bb14616b584a9a260127fb47298e5acfe704fa543b6e10a5541ef32187c18d", "content_hash": "d85473e2aa7dfecd9ccac0f409874a61f98077a1661f6a8b7a138579f37d784d", "source_database": "center", "source_revision": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u5728\u6784\u5efa\u670d\u52a1\u5668\u65f6\u901a\u8fc7\u4fee\u6539 --with-wal-segsize configure \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/10/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/10/wal-internals.html", "method": "same-major semantic node", "sha256": "b3d607179caaab6f00f86bff4a0abbef36a3660a61b5eaccbf70516f3347fd76", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/10/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL logs are met, and that any necessary tuning is done (see Section 30.4 ).", "/versions/10/facts/0/label": "Definition scope", "/versions/10/facts/0/value": "Same-version core physical storage documentation", "/versions/10/related/0/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "217b8851e446c8c6f47263c3fda1e559305992fa82f6ef4538c83aedd550eba1", "canonical_center_text_hash": "d85473e2aa7dfecd9ccac0f409874a61f98077a1661f6a8b7a138579f37d784d"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u5728\u6784\u5efa\u670d\u52a1\u5668\u65f6\u901a\u8fc7\u4fee\u6539 --with-wal-segsize configure \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p> <acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/10/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/10/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p> <acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u5728\u6784\u5efa\u670d\u52a1\u5668\u65f6\u901a\u8fc7\u4fee\u6539\n   <code>--with-wal-segsize</code> configure \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/10/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "11": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/relopts/?v=11", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v11.22/postgresql-11.22.tar.bz2", "label": "11.22", "major": "11", "channel": "stable", "revision": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "sources": [{"url": "/docs/11/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 11 English manual", "sha256": "56efdd32415762c4ce1acbc3a04ab33f03e8bcab7ce26106d4baa4ea4f3d092d"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/11/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "11", "build_id": 64, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "08350b30e2bfde345db6f108c520cca2544c7b032e12aec0ddfe53aabc8528d6", "fragment_sha256": "fa1f5554ad61b62c7b5eb46d2eecba5fdef692e723785b506c96cc614780efc7", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:ef5c7bc074acae9795db16e6b7482aea3b222bd4bcce0f76831332b97a21e8a1", "translated_from_revision": null}, "body_sha256": "2c1094a5bd80faa9784cc8b89f67b898c93b0b063532121652e0182526bcf42f", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "11", "text_hash": "bc433e0e915503abe392fe350f91516786a3391c022937c4f3aecd879b38ccf3", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/11/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "11", "build_id": 64, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "08350b30e2bfde345db6f108c520cca2544c7b032e12aec0ddfe53aabc8528d6", "fragment_sha256": "fa1f5554ad61b62c7b5eb46d2eecba5fdef692e723785b506c96cc614780efc7", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:ef5c7bc074acae9795db16e6b7482aea3b222bd4bcce0f76831332b97a21e8a1", "translated_from_revision": null}, "body_sha256": "2c1094a5bd80faa9784cc8b89f67b898c93b0b063532121652e0182526bcf42f", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/11/wal-configuration.html\">\u7b2c\u00a030.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/11/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/11/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "11", "link_map": {"/zh/docs/11/wal-internals.html": "/docs/11/wal-internals.html", "/zh/docs/11/datatype-pg-lsn.html": "/docs/11/datatype-pg-lsn.html", "/zh/docs/11/wal-configuration.html": "/docs/11/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/11/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/11/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/11/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "32bc73005c13cf8fdb3bc6f990a957973fc66948f7e8f03cfc6d61879e9d35bd", "content_hash": "bc433e0e915503abe392fe350f91516786a3391c022937c4f3aecd879b38ccf3", "source_database": "center", "source_revision": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/11/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/11/wal-internals.html", "method": "same-major semantic node", "sha256": "eb009a87c6f0009532c7702be7aa65d4d9a2edd5e4c41cf5ae89d73ec37e2a12", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/11/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL logs are met, and that any necessary tuning is done (see Section 30.4 ).", "/versions/11/facts/0/label": "Definition scope", "/versions/11/facts/0/value": "Same-version core physical storage documentation", "/versions/11/related/0/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "5ade3370a20bcf6c238e1e6e681054e5beab0f78ea3c82f6b33b316b0286fa3a", "canonical_center_text_hash": "bc433e0e915503abe392fe350f91516786a3391c022937c4f3aecd879b38ccf3"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/11/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/11/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/11/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "12": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=12", "label": "Table AM"}, {"url": "/wiki/relopts/?v=12", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v12.22/postgresql-12.22.tar.bz2", "label": "12.22", "major": "12", "channel": "stable", "revision": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "sources": [{"url": "/docs/12/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 12 English manual", "sha256": "56a61ae576c15c7069a7e9af572aa95b3fbc83df5953dbfb6678c5424c24d281"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/12/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "12", "build_id": 65, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "d31b891292027d527cb19dadf2c6473f5656259b84baffcbc9eab3606386661e", "fragment_sha256": "a46c4a93a4f732074162a1eca44ae4ee0e8251d606db47f591501df88928997e", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:86d2ff781f93e1de17122ebc514d5e64fcb63fed15941f496d7e146c6dcc7a49", "translated_from_revision": null}, "body_sha256": "2afec2196113cbcff929f9efd3bf3c10851791edac53014e2b1cf33a1e597331", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "12", "text_hash": "878676ed6609698eb9141811529493e135acacadf6818ef8021d5a36fb82c4b9", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/12/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "12", "build_id": 65, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "d31b891292027d527cb19dadf2c6473f5656259b84baffcbc9eab3606386661e", "fragment_sha256": "a46c4a93a4f732074162a1eca44ae4ee0e8251d606db47f591501df88928997e", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:86d2ff781f93e1de17122ebc514d5e64fcb63fed15941f496d7e146c6dcc7a49", "translated_from_revision": null}, "body_sha256": "2afec2196113cbcff929f9efd3bf3c10851791edac53014e2b1cf33a1e597331", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 29.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/12/wal-configuration.html\">\u7b2c\u00a029.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/12/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/12/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 29.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "12", "link_map": {"/zh/docs/12/wal-internals.html": "/docs/12/wal-internals.html", "/zh/docs/12/datatype-pg-lsn.html": "/docs/12/datatype-pg-lsn.html", "/zh/docs/12/wal-configuration.html": "/docs/12/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/12/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a029.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/12/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/12/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "2343fdcad54fb6929d17b6d3017622b8835eb660402b9c7b89360ad26222e976", "content_hash": "878676ed6609698eb9141811529493e135acacadf6818ef8021d5a36fb82c4b9", "source_database": "center", "source_revision": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 29.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/12/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/12/wal-internals.html", "method": "same-major semantic node", "sha256": "ae9b874a6b3fb51c6ac7fbc504107832f2cf4b2930e8cb7b2da4eb91f7d92caf", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/12/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL logs are met, and that any necessary tuning is done (see Section 29.4 ).", "/versions/12/facts/0/label": "Definition scope", "/versions/12/facts/0/value": "Same-version core physical storage documentation", "/versions/12/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "b45c5e3751dc39cbde229235d123f00bacb0a5f10ae2101df0620f5ce14c00c6", "canonical_center_text_hash": "878676ed6609698eb9141811529493e135acacadf6818ef8021d5a36fb82c4b9"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 29.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/12/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a029.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/12/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/12/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "13": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=13", "label": "Table AM"}, {"url": "/wiki/relopts/?v=13", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v13.23/postgresql-13.23.tar.bz2", "label": "13.23", "major": "13", "channel": "stable", "revision": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "sources": [{"url": "/docs/13/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 13 English manual", "sha256": "8a5b29e6b99c671811f4c25131bf47d2ea33ad5b9a8ed67a1c4ce7828ed9d3cc"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/13/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "13", "build_id": 66, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "4d728239f4f1b91c7fed4a1ba78b56f3aae67b52af9e5e3d3fb8c4fe81d5a610", "fragment_sha256": "15bf560539374a978756d0b86165263c5f1b7905cb3ca917e10980de13ad928a", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:a13a825c39f0268ef1cfe9137e283e38d0da73b2d7894f0733c7b26372a4f6a4", "translated_from_revision": null}, "body_sha256": "266f58e66442771c17230e4e4ff17505224442b728e7651d332285e50a668f7f", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "13", "text_hash": "1c8021dbab97c118981715818940248ce104bdd5c1a085f13427be71cd408d74", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/13/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "13", "build_id": 66, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "4d728239f4f1b91c7fed4a1ba78b56f3aae67b52af9e5e3d3fb8c4fe81d5a610", "fragment_sha256": "15bf560539374a978756d0b86165263c5f1b7905cb3ca917e10980de13ad928a", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:a13a825c39f0268ef1cfe9137e283e38d0da73b2d7894f0733c7b26372a4f6a4", "translated_from_revision": null}, "body_sha256": "266f58e66442771c17230e4e4ff17505224442b728e7651d332285e50a668f7f", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 29.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/13/wal-configuration.html\">\u7b2c\u00a029.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/13/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/13/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 29.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "13", "link_map": {"/zh/docs/13/wal-internals.html": "/docs/13/wal-internals.html", "/zh/docs/13/datatype-pg-lsn.html": "/docs/13/datatype-pg-lsn.html", "/zh/docs/13/wal-configuration.html": "/docs/13/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/13/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a029.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/13/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/13/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "62bdff2e1a41b0e41278659c3b3c1c9ea41a0f6b71750e22b7b0ffe85b560dc1", "content_hash": "1c8021dbab97c118981715818940248ce104bdd5c1a085f13427be71cd408d74", "source_database": "center", "source_revision": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 29.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/13/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/13/wal-internals.html", "method": "same-major semantic node", "sha256": "013fc4f16cc3c6ae1f286bc18c4ce55a34c9fe3d27174004614990bd30191681", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/13/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL logs are met, and that any necessary tuning is done (see Section 29.4 ).", "/versions/13/facts/0/label": "Definition scope", "/versions/13/facts/0/value": "Same-version core physical storage documentation", "/versions/13/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "0435151e2b5f8a14ae049757c882baccd674a34e5e44e3e476a849ebef63454c", "canonical_center_text_hash": "1c8021dbab97c118981715818940248ce104bdd5c1a085f13427be71cd408d74"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 29.4 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/13/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a029.4\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/13/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/13/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "14": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=14", "label": "Table AM"}, {"url": "/wiki/relopts/?v=14", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v14.24/postgresql-14.24.tar.bz2", "label": "14.24", "major": "14", "channel": "stable", "revision": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "sources": [{"url": "/docs/14/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 14 English manual", "sha256": "c9448655bebb6b1ad021979093d3bf6ebad48d7e6730d69b9564aa45f0c22f8e"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/14/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "14", "build_id": 99, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "5531a574e81b4069cceb4a4412f8561c1fd30bb5d4dedf6102457a8c4c446f99", "fragment_sha256": "949eb8d85c1c08e3b83874606da02fa9a2bd7d4e82d4fcf5cfadf6515e3d9ffc", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:87e6aa4fd6e1ec85c5f4a6de4f5647cfd9e5de734ca2c266d32b6d6192c662ef", "translated_from_revision": null}, "body_sha256": "8dfc03ba0b236e06eb713c933db08c78176b61a37004372eb5190f91bc4826e0", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "14", "text_hash": "eac7da4204cbb09027c3389c8fe0041e9615e776584c82b609af182b5e1c532f", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/14/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "14", "build_id": 99, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "5531a574e81b4069cceb4a4412f8561c1fd30bb5d4dedf6102457a8c4c446f99", "fragment_sha256": "949eb8d85c1c08e3b83874606da02fa9a2bd7d4e82d4fcf5cfadf6515e3d9ffc", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:87e6aa4fd6e1ec85c5f4a6de4f5647cfd9e5de734ca2c266d32b6d6192c662ef", "translated_from_revision": null}, "body_sha256": "8dfc03ba0b236e06eb713c933db08c78176b61a37004372eb5190f91bc4826e0", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/14/wal-configuration.html\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/14/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> <span class=\"application\">initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/14/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "14", "link_map": {"/zh/docs/14/wal-internals.html": "/docs/14/wal-internals.html", "/zh/docs/14/datatype-pg-lsn.html": "/docs/14/datatype-pg-lsn.html", "/zh/docs/14/wal-configuration.html": "/docs/14/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/14/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/14/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/14/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "233dc62dd0ff712f5acd595f748f7cec35c3c849cb4f0d26d06a9349eeb636a0", "content_hash": "eac7da4204cbb09027c3389c8fe0041e9615e776584c82b609af182b5e1c532f", "source_database": "center", "source_revision": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/14/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/14/wal-internals.html", "method": "same-major semantic node", "sha256": "a9f55607b111d8c1c598d814036ff21f09c3f94b77a86489b6dc066356c9c1f6", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/14/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL logs are met, and that any necessary tuning is done (see Section 30.5 ).", "/versions/14/facts/0/label": "Definition scope", "/versions/14/facts/0/value": "Same-version core physical storage documentation", "/versions/14/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "318c88895c2ca10bbb0c4b1f2d726041318e20bc05338616e98e1ae05a6791c8", "canonical_center_text_hash": "eac7da4204cbb09027c3389c8fe0041e9615e776584c82b609af182b5e1c532f"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/14/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/14/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/14/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "15": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=15", "label": "Table AM"}, {"url": "/wiki/relopts/?v=15", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v15.19/postgresql-15.19.tar.bz2", "label": "15.19", "major": "15", "channel": "stable", "revision": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "sources": [{"url": "/docs/15/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 15 English manual", "sha256": "2b9ad5a55a65e8a2d3cf0bd3f75a64245dcf81c6055cfdf89e09bfda66f5453c"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/15/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "15", "build_id": 101, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "5b780d02580e59cc88c0905ab44cfe47d5230100b1941b740598bf3a9d83304c", "fragment_sha256": "8ee44ca0d44c85798fbb3ebf01a3cbe4c4a498c4356ee7024bf98bb2cb59f155", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:6bce1a2df9170cb1146a1411c5547190856638221a6539e618ee1016c9f493ad", "translated_from_revision": null}, "body_sha256": "811caa69feaa09058ab6ae86ae14118b861adc59eea56247d04770b3cd6ee401", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "15", "text_hash": "e42dd174f29a246cbce97e84042d8459f0e9e9491ed141fe37c376adfef88c59", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/15/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "15", "build_id": 101, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "5b780d02580e59cc88c0905ab44cfe47d5230100b1941b740598bf3a9d83304c", "fragment_sha256": "8ee44ca0d44c85798fbb3ebf01a3cbe4c4a498c4356ee7024bf98bb2cb59f155", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:6bce1a2df9170cb1146a1411c5547190856638221a6539e618ee1016c9f493ad", "translated_from_revision": null}, "body_sha256": "811caa69feaa09058ab6ae86ae14118b861adc59eea56247d04770b3cd6ee401", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/15/wal-configuration.html\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/15/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> <span class=\"application\">initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/15/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "15", "link_map": {"/zh/docs/15/wal-internals.html": "/docs/15/wal-internals.html", "/zh/docs/15/datatype-pg-lsn.html": "/docs/15/datatype-pg-lsn.html", "/zh/docs/15/wal-configuration.html": "/docs/15/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/15/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/15/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/15/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "d452940ea57c2fc9f24f44a911d95b0e49e4375dade382d6a83f10f0a7a66dee", "content_hash": "e42dd174f29a246cbce97e84042d8459f0e9e9491ed141fe37c376adfef88c59", "source_database": "center", "source_revision": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/15/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/15/wal-internals.html", "method": "same-major semantic node", "sha256": "72c6472136dc35d4b8a286b40fcea36b087da3ed62a524eb4b08329acd82aa75", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/15/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL logs are met, and that any necessary tuning is done (see Section 30.5 ).", "/versions/15/facts/0/label": "Definition scope", "/versions/15/facts/0/value": "Same-version core physical storage documentation", "/versions/15/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "e2a75b3eea64375c284a5f72a5df22e33c9d282565c51185b8ef7485a0788032", "canonical_center_text_hash": "e42dd174f29a246cbce97e84042d8459f0e9e9491ed141fe37c376adfef88c59"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/15/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/15/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/15/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "16": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=16", "label": "Table AM"}, {"url": "/wiki/relopts/?v=16", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v16.15/postgresql-16.15.tar.bz2", "label": "16.15", "major": "16", "channel": "stable", "revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "sources": [{"url": "/docs/16/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 16 English manual", "sha256": "965ad174d6e86754ba6d95a80a46d7415a5f4d8205629df4924017cb31d6d046"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/16/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "16", "build_id": 103, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "761b6f2f7e45d933e1a92bf6d68c2e996a00690c77c2bccac07a3b532c656301", "fragment_sha256": "50e4d477fe02f60c46d268923b3fe973853a39a218fca7e3c0049decc4d9ac68", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:80579a071736780f9c4022bb5148e1fb1256f1a33591306af67816e9e9bf3a9b", "translated_from_revision": null}, "body_sha256": "c5c9e698a5ae669f31d0368659d601e0fff79b277f18304093a7bd4fcd776412", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "16", "text_hash": "c81bd7efbc706e48d6567ddf437bf435c7ef708b96fc3e23ae7b80215dfb1a6c", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/16/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "16", "build_id": 103, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "761b6f2f7e45d933e1a92bf6d68c2e996a00690c77c2bccac07a3b532c656301", "fragment_sha256": "50e4d477fe02f60c46d268923b3fe973853a39a218fca7e3c0049decc4d9ac68", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:80579a071736780f9c4022bb5148e1fb1256f1a33591306af67816e9e9bf3a9b", "translated_from_revision": null}, "body_sha256": "c5c9e698a5ae669f31d0368659d601e0fff79b277f18304093a7bd4fcd776412", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/16/wal-configuration.html\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/16/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> <span class=\"application\">initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/16/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "16", "link_map": {"/zh/docs/16/wal-internals.html": "/docs/16/wal-internals.html", "/zh/docs/16/datatype-pg-lsn.html": "/docs/16/datatype-pg-lsn.html", "/zh/docs/16/wal-configuration.html": "/docs/16/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/16/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/16/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/16/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "d2219c94e806c4b2c249f334ed6b4dc53451c7f477e42c5fa2f0fd672220e31e", "content_hash": "c81bd7efbc706e48d6567ddf437bf435c7ef708b96fc3e23ae7b80215dfb1a6c", "source_database": "center", "source_revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/16/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/16/wal-internals.html", "method": "same-major semantic node", "sha256": "841d230b9c606f65d3af5b077bb8c8cbdf6469d801c600e3554aa6f27b850c02", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/16/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL files are met, and that any necessary tuning is done (see Section 30.5 ).", "/versions/16/facts/0/label": "Definition scope", "/versions/16/facts/0/value": "Same-version core physical storage documentation", "/versions/16/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "57c02d61b4ab4c237af62f0a051bf7582075732774a3754e27a399642b77376b", "canonical_center_text_hash": "c81bd7efbc706e48d6567ddf437bf435c7ef708b96fc3e23ae7b80215dfb1a6c"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 30.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/16/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a030.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/16/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/16/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "17": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=17", "label": "Table AM"}, {"url": "/wiki/relopts/?v=17", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v17.11/postgresql-17.11.tar.bz2", "label": "17.11", "major": "17", "channel": "stable", "revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "sources": [{"url": "/docs/17/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 17 English manual", "sha256": "2d5e9788085ba33889e36ae6648163dcf4757c95d2c3c4c9c96e5a4d8e5d1440"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/17/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "17", "build_id": 105, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "d63e71826534cd99ded69bb1f4f3f611c335cd662bac20bbf039bce8ea5913ac", "fragment_sha256": "6d5b807f4b21f9970beb49264d33070ad5b9c13131bf284f98f34e68e301d49e", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:7340767258d21c21b36f373f1fff6bab2be18e0daca13a865129db6105c09efd", "translated_from_revision": null}, "body_sha256": "9131c50044e6fe98784ecbae436bf52b53bbaece2cb38de31a60507ea26b7d98", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "17", "text_hash": "02328e9bcbc2b0fb3c775226c9928f5dec50ab9fa4f7629a525aa7929c5d1c1b", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/17/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "17", "build_id": 105, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "d63e71826534cd99ded69bb1f4f3f611c335cd662bac20bbf039bce8ea5913ac", "fragment_sha256": "6d5b807f4b21f9970beb49264d33070ad5b9c13131bf284f98f34e68e301d49e", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:7340767258d21c21b36f373f1fff6bab2be18e0daca13a865129db6105c09efd", "translated_from_revision": null}, "body_sha256": "9131c50044e6fe98784ecbae436bf52b53bbaece2cb38de31a60507ea26b7d98", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/17/wal-configuration.html\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/17/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> <span class=\"application\">initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/17/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "17", "link_map": {"/zh/docs/17/wal-internals.html": "/docs/17/wal-internals.html", "/zh/docs/17/datatype-pg-lsn.html": "/docs/17/datatype-pg-lsn.html", "/zh/docs/17/wal-configuration.html": "/docs/17/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/17/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/17/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/17/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "c5aa1e216e388e32d7598dd6c9cb2dfcf6e26f41e992631af885d9e29a495750", "content_hash": "02328e9bcbc2b0fb3c775226c9928f5dec50ab9fa4f7629a525aa7929c5d1c1b", "source_database": "center", "source_revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/17/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/17/wal-internals.html", "method": "same-major semantic node", "sha256": "d5d95231324cd36c0e5b2f841e7441663539ea2bfb19cf3e944e01133c627225", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/17/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL files are met, and that any necessary tuning is done (see Section 28.5 ).", "/versions/17/facts/0/label": "Definition scope", "/versions/17/facts/0/value": "Same-version core physical storage documentation", "/versions/17/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "dc8165f58e064228dc04ae98bac5180aa39a83f40af6698c7b0f77cf878151de", "canonical_center_text_hash": "02328e9bcbc2b0fb3c775226c9928f5dec50ab9fa4f7629a525aa7929c5d1c1b"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/17/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/17/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/17/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "18": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=18", "label": "Table AM"}, {"url": "/wiki/relopts/?v=18", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "label": "18.6", "major": "18", "channel": "stable", "revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sources": [{"url": "/docs/18/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 18 English manual", "sha256": "81c125b1657049ba0b146e15b1decb82aa524ac54df1add0b07e154d95f3f300"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/18/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "18", "build_id": 107, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "aa49da7337b89d6d213b58a08c640ec5af68b764fc70e19ecdafaf1e4e2f2241", "fragment_sha256": "8455a6c0e0a7acaf68d56ea4c590a1512739ac8923b8e74f8c78950635b21f48", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b", "translated_from_revision": null}, "body_sha256": "9ac2159e018e63e6c39a376a35f072e8b93a1cbce8faf79cbe8015eba1275a14", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "18", "text_hash": "dd736245debd738982e373d5a4b162a19a324018ecb1a80464dfbead7300a59a", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/18/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "18", "build_id": 107, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "aa49da7337b89d6d213b58a08c640ec5af68b764fc70e19ecdafaf1e4e2f2241", "fragment_sha256": "8455a6c0e0a7acaf68d56ea4c590a1512739ac8923b8e74f8c78950635b21f48", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b", "translated_from_revision": null}, "body_sha256": "9ac2159e018e63e6c39a376a35f072e8b93a1cbce8faf79cbe8015eba1275a14", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/18/wal-configuration.html\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/18/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> <span class=\"application\">initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/18/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "18", "link_map": {"/zh/docs/18/wal-internals.html": "/docs/18/wal-internals.html", "/zh/docs/18/datatype-pg-lsn.html": "/docs/18/datatype-pg-lsn.html", "/zh/docs/18/wal-configuration.html": "/docs/18/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/18/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/18/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/18/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "33c6f73430e3c51efb3dcc4d1bb66ba26b9654d58942243681f4d09b05ca6f57", "content_hash": "dd736245debd738982e373d5a4b162a19a324018ecb1a80464dfbead7300a59a", "source_database": "center", "source_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/18/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/18/wal-internals.html", "method": "same-major semantic node", "sha256": "2b47ee60d086af365386b66b52f4a64392d598d2bdfc4734086164a0c385fcbe", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL files are met, and that any necessary tuning is done (see Section 28.5 ).", "/versions/18/facts/0/label": "Definition scope", "/versions/18/facts/0/value": "Same-version core physical storage documentation", "/versions/18/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "6a51619ad9c1874caed6b416cb7b2726b9ba57f317400910c93836bc9260fb9d", "canonical_center_text_hash": "dd736245debd738982e373d5a4b162a19a324018ecb1a80464dfbead7300a59a"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/18/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/18/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/18/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "center_zh_rendered": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\nWAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/docs/18/wal-configuration.html\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0cWAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08LSN\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/docs/18/datatype-pg-lsn.html\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\nWAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/docs/18/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "19": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=19", "label": "Table AM"}, {"url": "/wiki/relopts/?v=19", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v19rc1/postgresql-19rc1.tar.bz2", "label": "19rc1", "major": "19", "channel": "preview", "revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "sources": [{"url": "/docs/19/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 19 English manual", "sha256": "d5e621a60dbb370c7240af672f27f2e488edb99498b75b835bd8f347af839551"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/19/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "19", "build_id": 109, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "15b6f9072f74b9ceb0ed7bb56a88c3727a138898475e489e0f708a912cf046fe", "fragment_sha256": "fa0e2e921eed82946411de82e2c060ec83c0e47ae2478b6f7b009f7d0069eae1", "source_revision": "sha256:af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:65fda1f1b62a89992b84014c9157e61b67dbe8190e93945826efec668fad038c", "translated_from_revision": "sha256:af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "body_sha256": "1b7404fe0aa319a94e902908bd9a5d1364b5d5a308b48c3b2c8e4b8fb7a4bd53", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "19", "text_hash": "36ca2a52ff7a683858ce61abd24cf12e9958c71d4b224f0a4bc16735e609e436", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/19/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "19", "build_id": 109, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "15b6f9072f74b9ceb0ed7bb56a88c3727a138898475e489e0f708a912cf046fe", "fragment_sha256": "fa0e2e921eed82946411de82e2c060ec83c0e47ae2478b6f7b009f7d0069eae1", "source_revision": "sha256:af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:65fda1f1b62a89992b84014c9157e61b67dbe8190e93945826efec668fad038c", "translated_from_revision": "sha256:af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "body_sha256": "1b7404fe0aa319a94e902908bd9a5d1364b5d5a308b48c3b2c8e4b8fb7a4bd53", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/19/wal-configuration.html\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/19/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> <span class=\"application\">initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/19/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "19", "link_map": {"/zh/docs/19/wal-internals.html": "/docs/19/wal-internals.html", "/zh/docs/19/datatype-pg-lsn.html": "/docs/19/datatype-pg-lsn.html", "/zh/docs/19/wal-configuration.html": "/docs/19/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/19/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/19/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/19/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "c0f382e913be9bdf089ad91a48b70a808f0710740c35bae07795efb7482429c9", "content_hash": "36ca2a52ff7a683858ce61abd24cf12e9958c71d4b224f0a4bc16735e609e436", "source_database": "center", "source_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/19/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/19/wal-internals.html", "method": "same-major semantic node", "sha256": "b3ef489a461cde0c74fc9eeec6cb81ec694f93874adc2cec5ad9cbc5e925f2ce", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/19/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL files are met, and that any necessary tuning is done (see Section 28.5 ).", "/versions/19/facts/0/label": "Definition scope", "/versions/19/facts/0/value": "Same-version core physical storage documentation", "/versions/19/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "367c2264abef4656b3950c055b5c8bec2e1082d77e5692460ba851c1ece76b30", "canonical_center_text_hash": "36ca2a52ff7a683858ce61abd24cf12e9958c71d4b224f0a4bc16735e609e436"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/19/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/19/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/19/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "source_revalidation": {"kind": "static-same-version-source-and-manual-replay", "audit": "wiki-audit-20261023", "runtime_rerun": false, "compared_fields": "entity membership and source-derived facts; presentation markup normalized", "source_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701", "previous_source_revision": "83157ee9c599d03b2f7a3d73ef3a56ec24e0e79cc2b3501a64d1364f56398c86"}}, "20": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=20", "label": "Table AM"}, {"url": "/wiki/relopts/?v=20", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/snapshot/dev/postgresql-snapshot.tar.bz2", "label": "20devel", "major": "20", "channel": "devel", "revision": "49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac"}, "sources": [{"url": "/docs/devel/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 20 English manual", "sha256": "5e818cd903206a50d78ca1f44bafbed7779dcc0bee7414584ed0fdbe3a7bae56"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/devel/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "20", "build_id": 111, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "72f592deb6d8a74adb5caf23b8185006921013c0aaad598b0001699c7f3e66c7", "fragment_sha256": "f386308bdc2e3ccd221978c2bb4b336d6b3723498336acde2246876bf09a6636", "source_revision": "sha256:49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:98c980963b401d40bd50df72b909e7523e3148b8fdb48edd897de2efb67e5235", "translated_from_revision": "sha256:49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac"}, "body_sha256": "24b649cd010a232f1c202d21e07dcd26b288b474f908d3b943b6c8ce006e6c12", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "20", "text_hash": "466458c32f531e2f58acb57084b80727792e184a5ce89c036831f561bbc3f8f3", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/devel/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "20", "build_id": 111, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "72f592deb6d8a74adb5caf23b8185006921013c0aaad598b0001699c7f3e66c7", "fragment_sha256": "f386308bdc2e3ccd221978c2bb4b336d6b3723498336acde2246876bf09a6636", "source_revision": "sha256:49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:98c980963b401d40bd50df72b909e7523e3148b8fdb48edd897de2efb67e5235", "translated_from_revision": "sha256:49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac"}, "body_sha256": "24b649cd010a232f1c202d21e07dcd26b288b474f908d3b943b6c8ce006e6c12", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/devel/wal-configuration.html\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/devel/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> <span class=\"application\">initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/devel/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "20", "link_map": {"/zh/docs/devel/wal-internals.html": "/docs/devel/wal-internals.html", "/zh/docs/devel/datatype-pg-lsn.html": "/docs/devel/datatype-pg-lsn.html", "/zh/docs/devel/wal-configuration.html": "/docs/devel/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/devel/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/devel/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/devel/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "d3572d3c08928b91970aaeb062ceb286bf5a0bcf28069b253836742a99ebaede", "content_hash": "466458c32f531e2f58acb57084b80727792e184a5ce89c036831f561bbc3f8f3", "source_database": "center", "source_revision": "49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/devel/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/devel/wal-internals.html", "method": "same-major semantic node", "sha256": "ab9efd294ab0f424899eb0513f9b5d74cb2595791ad30fc78791d9a3b319c5be", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/summary": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL files are met, and that any necessary tuning is done (see Section 28.5 ).", "/category": "Physical structures", "/versions/20/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL files are met, and that any necessary tuning is done (see Section 28.5 ).", "/versions/20/facts/0/label": "Definition scope", "/versions/20/facts/0/value": "Same-version core physical storage documentation", "/versions/20/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "6467d8c5bc652cc819e4d2013b54f2b236d48b2d0237544ea034c5fede22bef7", "canonical_center_text_hash": "466458c32f531e2f58acb57084b80727792e184a5ce89c036831f561bbc3f8f3"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/devel/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/devel/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/devel/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "source_revalidation": {"kind": "static-same-version-source-and-manual-replay", "audit": "wiki-audit-20261023", "runtime_rerun": false, "compared_fields": "entity membership and source-derived facts; presentation markup normalized", "source_revision": "49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac", "previous_source_revision": "4d3346909b201ac1648232cf290462a7070c119326f56196f1f0253ed80fae41"}}}}, "snapshot": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "related": [{"url": "/wiki/tableam/?v=18", "label": "Table AM"}, {"url": "/wiki/relopts/?v=18", "label": "\u5b58\u50a8\u53c2\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "label": "18.6", "major": "18", "channel": "stable", "revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sources": [{"url": "/docs/18/wal-internals.html", "path": "wal-internals.html", "label": "PostgreSQL 18 English manual", "sha256": "81c125b1657049ba0b146e15b1decb82aa524ac54df1add0b07e154d95f3f300"}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/18/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "18", "build_id": 107, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "aa49da7337b89d6d213b58a08c640ec5af68b764fc70e19ecdafaf1e4e2f2241", "fragment_sha256": "8455a6c0e0a7acaf68d56ea4c590a1512739ac8923b8e74f8c78950635b21f48", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b", "translated_from_revision": null}, "body_sha256": "9ac2159e018e63e6c39a376a35f072e8b93a1cbce8faf79cbe8015eba1275a14", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "facts_zh": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "sections": [], "center_zh": {"title": "WAL Internals", "locale": "zh-Hans", "source": {"key": "wal-internals", "locale": "zh-Hans", "version": "18", "text_hash": "dd736245debd738982e373d5a4b162a19a324018ecb1a80464dfbead7300a59a", "collection": "storage", "dataset_hash": "7c31b524dfe136022d39a6ae8dcfac6b3bbd5f8fdaf422536599981252aff0c9", "source_database": "center", "source_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "payload": {"facts": [{"label": "\u5b9a\u4e49\u8303\u56f4", "value": "\u540c\u7248\u672c\u6838\u5fc3\u7269\u7406\u5b58\u50a8\u6587\u6863"}], "tables": [], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-identity", "manual": {"url": "/zh/docs/18/wal-internals.html", "anchor": "", "locale": "zh-Hans", "version": "18", "build_id": 107, "page_key": "wal-internals.html", "extraction": "concept-introduction", "source_hash": "aa49da7337b89d6d213b58a08c640ec5af68b764fc70e19ecdafaf1e4e2f2241", "fragment_sha256": "8455a6c0e0a7acaf68d56ea4c590a1512739ac8923b8e74f8c78950635b21f48", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b", "translated_from_revision": null}, "body_sha256": "9ac2159e018e63e6c39a376a35f072e8b93a1cbce8faf79cbe8015eba1275a14", "runtime_rerun": false, "authored_translation": "source-derived-identity", "source_facts_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sections": [], "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym class=\"acronym\">WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a class=\"xref\" href=\"/zh/docs/18/wal-configuration.html\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym class=\"acronym\">WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym class=\"acronym\">LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym class=\"acronym\">LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a class=\"link\" href=\"/zh/docs/18/datatype-pg-lsn.html\"><code class=\"type\">pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym class=\"acronym\">WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym class=\"acronym\">WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code class=\"option\">--wal-segsize</code> <span class=\"application\">initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code class=\"option\">--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code class=\"filename\">access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code class=\"filename\">000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code class=\"filename\">pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/18/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "version": "18", "link_map": {"/zh/docs/18/wal-internals.html": "/docs/18/wal-internals.html", "/zh/docs/18/datatype-pg-lsn.html": "/docs/18/datatype-pg-lsn.html", "/zh/docs/18/wal-configuration.html": "/docs/18/wal-configuration.html"}, "body_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/18/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/18/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/18/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "33c6f73430e3c51efb3dcc4d1bb66ba26b9654d58942243681f4d09b05ca6f57", "content_hash": "dd736245debd738982e373d5a4b162a19a324018ecb1a80464dfbead7300a59a", "source_database": "center", "source_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "signature": "", "tables_zh": [], "description": ["WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002"], "manual_html": "", "manual_path": "/docs/18/wal-internals.html", "sections_zh": [], "localization": {"status": "complete", "sources": [{"url": "/docs/18/wal-internals.html", "method": "same-major semantic node", "sha256": "2b47ee60d086af365386b66b52f4a64392d598d2bdfc4734086164a0c385fcbe", "language": "zh", "matched_nodes": ["#WAL-INTERNALS/div[0]", "#WAL-INTERNALS/p[2]", "#WAL-INTERNALS/p[4]", "#WAL-INTERNALS/p[5]", "#WAL-INTERNALS/p[6]", "#WAL-INTERNALS/p[7]", "#WAL-INTERNALS/p[8]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "WAL is automatically enabled; no action is required from the administrator except ensuring that the disk-space requirements for the WAL files are met, and that any necessary tuning is done (see Section 28.5 ).", "/versions/18/facts/0/label": "Definition scope", "/versions/18/facts/0/value": "Same-version core physical storage documentation", "/versions/18/related/1/label": "Storage Parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "6a51619ad9c1874caed6b416cb7b2726b9ba57f317400910c93836bc9260fb9d", "canonical_center_text_hash": "dd736245debd738982e373d5a4b162a19a324018ecb1a80464dfbead7300a59a"}, "description_zh": "WAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3 WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1 \u7b2c 28.5 \u8282 \uff09\u3002 \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c WAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230 WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08 LSN \uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002 LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b pg_lsn \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002 WAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 pg_wal \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539 --wal-segsize initdb \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 --with-wal-blocksize \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728 access/xlogrecord.h \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece 000000010000000000000001 \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002 \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a pg_wal \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002", "comparison_data": {"layouts": []}, "comparison_hash": "27341929154bfb55531f03501322b65af719c5561f3c4ddc9528a14aa4df69b5", "manual_language": "zh", "description_zh_html": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n<acronym>WAL</acronym> \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   <acronym>WAL</acronym> \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/zh/docs/18/wal-configuration.html\" rel=\"nofollow\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0c<acronym>WAL</acronym> \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   <acronym>WAL</acronym> \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08<acronym>LSN</acronym>\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002<acronym>LSN</acronym> \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/zh/docs/18/datatype-pg-lsn.html\" rel=\"nofollow\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 <acronym>WAL</acronym> \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\n<acronym>WAL</acronym> \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/zh/docs/18/wal-internals.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "center_zh_rendered": "<p>\u5b58\u50a8\u7ed3\u6784 wal-internals\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\nWAL \u4f1a\u81ea\u52a8\u542f\u7528\uff1b\u7ba1\u7406\u5458\u9664\u4e86\u786e\u4fdd\u6ee1\u8db3\n   WAL \u6587\u4ef6\u7684\u78c1\u76d8\u7a7a\u95f4\u9700\u6c42\uff0c\u5e76\u5b8c\u6210\u4efb\u4f55\u5fc5\u8981\u8c03\u4f18\u4e4b\u5916\uff0c\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6\u64cd\u4f5c\uff08\u89c1<a href=\"/docs/18/wal-configuration.html\">\u7b2c\u00a028.5\u00a0\u8282</a>\uff09\u3002\n  </p><p>\n   \u6bcf\u5199\u5165\u4e00\u6761\u65b0\u8bb0\u5f55\uff0cWAL \u8bb0\u5f55\u5c31\u4f1a\u8ffd\u52a0\u5230\n   WAL \u6587\u4ef6\u4e2d\u3002\u63d2\u5165\u4f4d\u7f6e\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7\uff08LSN\uff09\u63cf\u8ff0\uff0c\u5b83\u662f WAL \u5185\u7684\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u4f1a\u968f\u7740\u6bcf\u6761\u65b0\u8bb0\u5f55\u7684\u5199\u5165\u800c\u5355\u8c03\u9012\u589e\u3002LSN \u503c\u4ee5\u6570\u636e\u7c7b\u578b\n   <a href=\"/docs/18/datatype-pg-lsn.html\"><code>pg_lsn</code></a> \u8fd4\u56de\u3002\u901a\u8fc7\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u53ef\u4ee5\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u76f8\u9694\u7684 WAL \u6570\u636e\u91cf\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u7528\u4e8e\u8861\u91cf\u590d\u5236\u548c\u6062\u590d\u7684\u8fdb\u5ea6\u3002\n  </p><p>\nWAL \u6587\u4ef6\u4fdd\u5b58\u5728\u6570\u636e\u76ee\u5f55\u4e0b\u7684 <code>pg_wal</code> \u76ee\u5f55\u4e2d\uff0c\u7531\u4e00\u7ec4\u6bb5\u6587\u4ef6\u7ec4\u6210\uff0c\u6bcf\u4e2a\u6bb5\u901a\u5e38\u4e3a 16 MB\uff08\u4e0d\u8fc7\u53ef\u901a\u8fc7\u4fee\u6539\n   <code>--wal-segsize</code> <span>initdb</span> \u9009\u9879\u6765\u6539\u53d8\u5927\u5c0f\uff09\u3002\u6bcf\u4e2a\u6bb5\u53c8\u5206\u4e3a\u82e5\u5e72\u9875\u9762\uff0c\u901a\u5e38\u6bcf\u9875 8 kB\uff08\u8be5\u5927\u5c0f\u53ef\u901a\u8fc7 configure \u9009\u9879 <code>--with-wal-blocksize</code> \u66f4\u6539\uff09\u3002WAL \u8bb0\u5f55\u5934\u5b9a\u4e49\u5728\n   <code>access/xlogrecord.h</code> \u4e2d\uff1b\u8bb0\u5f55\u5185\u5bb9\u5219\u53d6\u51b3\u4e8e\u88ab\u8bb0\u5f55\u7684\u4e8b\u4ef6\u7c7b\u578b\u3002\u6bb5\u6587\u4ef6\u4ee5\u4e0d\u65ad\u9012\u589e\u7684\u6570\u5b57\u547d\u540d\uff0c\u4ece\n   <code>000000010000000000000001</code> \u5f00\u59cb\u3002\u8fd9\u4e9b\u7f16\u53f7\u4e0d\u4f1a\u56de\u7ed5\uff0c\u4f46\u8981\u628a\u53ef\u7528\u7684\u7f16\u53f7\u8017\u5c3d\u8fd8\u9700\u8981\u975e\u5e38\u3001\u975e\u5e38\u957f\u7684\u65f6\u95f4\u3002\n  </p><p>\n   \u5982\u679c\u80fd\u5c06 WAL \u653e\u5728\u4e0e\u4e3b\u6570\u636e\u5e93\u6587\u4ef6\u4e0d\u540c\u7684\u78c1\u76d8\u4e0a\uff0c\u4f1a\u66f4\u6709\u5229\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u628a\n   <code>pg_wal</code> \u76ee\u5f55\u79fb\u52a8\u5230\u5176\u4ed6\u4f4d\u7f6e\uff08\u5f53\u7136\u8981\u5728\u670d\u52a1\u5668\u5173\u95ed\u65f6\u8fdb\u884c\uff09\uff0c\u7136\u540e\u5728\u4e3b\u6570\u636e\u76ee\u5f55\u4e2d\u7684\u539f\u4f4d\u7f6e\u521b\u5efa\u4e00\u4e2a\u6307\u5411\u65b0\u4f4d\u7f6e\u7684\u7b26\u53f7\u94fe\u63a5\u6765\u5b9e\u73b0\u3002\n  </p><p><a href=\"/docs/18/wal-internals.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "comparison": {"left": "17", "right": "18", "status": "unchanged", "diff": ""}}