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\u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0c OpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "description_zh_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0cOpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "summary": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0c OpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "version": "11", "link_map": {"/zh/docs/11/libpq.html#LIBPQ-CONNECT-SSLCOMPRESSION": "/docs/11/libpq.html#LIBPQ-CONNECT-SSLCOMPRESSION"}, "body_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0cOpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002
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\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "body_sha256": "bfb06697ed4874bce8fb0dd1b17865190269982a34aeb74e1a490a9c29f9f06f", "content_hash": "ab8aedb0e835a6d31a77335d2c8ceee586c296fdb6e31a77579b0eb52a977b6b", "source_database": "center", "source_revision": "53315ddaf3b3f9e6669fd1edc096bbb2cd4a65ea3e836c89e542b43af9ba3a7f"}, "signature": "sslcompression", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/11/libpq-envars.html", "text": "PGSSLCOMPRESSION"}, "description": "PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0c OpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002 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For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults.", "/versions/11/sections/1/paragraphs/0": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter.", "/versions/11/tables/0/columns/0/label": "Variable", "/versions/11/tables/0/columns/1/label": "Documented behavior", "/versions/11/tables/0/rows/0/description": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "a2f83254535c1937b075ed8d3730866fada47496a52264cdf7423a03b084482f", "canonical_center_text_hash": "ab8aedb0e835a6d31a77335d2c8ceee586c296fdb6e31a77579b0eb52a977b6b"}, "source_option": {"keyword": "sslcompression", "declaration": "\"sslcompression\", \"PGSSLCOMPRESSION\", \"0\", NULL, \"SSL-Compression\", \"\", 1, offsetof(struct pg_conn, sslcompression)", "environment": "PGSSLCOMPRESSION", "source_notes": [], "compiled_default_expression": "\"0\""}, "description_zh": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0c OpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "comparison_data": {"keyword": "sslcompression", "definition": "If set to 1, data sent over SSL connections will be compressed. 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For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."]}, "12": {"facts": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 12.22"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "PGSSLCOMPRESSION"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "\"0\""}], "tables": [{"key": "environment", "rows": [{"name": {"url": "/docs/12/libpq-envars.html", "text": "PGSSLCOMPRESSION"}, "description": "PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "keyword": 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\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0cOpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "summary": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0c OpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "version": "12", "link_map": {"/zh/docs/12/libpq.html#LIBPQ-CONNECT-SSLCOMPRESSION": "/docs/12/libpq.html#LIBPQ-CONNECT-SSLCOMPRESSION"}, "body_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0cOpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "body_sha256": "69011910dc5727bbbfa6c0a3f1863a66c9cd3f4a7f470c5ad823794700062556", "content_hash": "3147307d0506d352b31e270e6bac115d32c1067149384851dcb324e8b9db4600", "source_database": "center", "source_revision": "7a827e97cbfacd7febff75f34443e2043e40723de5b6d8c9d81a9430b65a37e4"}, "signature": "sslcompression", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/12/libpq-envars.html", "text": "PGSSLCOMPRESSION"}, "description": "PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u4e0d\u5b89\u5168\uff0c\u5df2\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u66f4\u65e9\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u4e3a on \u4e0d\u4f1a\u4ea7\u751f\u6548\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0c OpenSSL 1.0.0 \u4e4b\u524d\u7684\u7248\u672c\u4e0d\u652f\u6301\u7981\u7528\u538b\u7f29\uff0c\u56e0\u6b64\u8fd9\u4e9b\u7248\u672c\u4f1a\u5ffd\u7565\u6b64\u53c2\u6570\uff0c\u662f\u5426\u4f7f\u7528\u538b\u7f29\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u3002 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% 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\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
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This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disables compression by default, and many operating system distributions disable it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disables compression completely in the backend."], "compiled_default_expression": "\"0\""}, "comparison_hash": "93e5db6642d9a87aa43125d28911134e358652302cfef4b0b78f3f6cb4f96b1f", "manual_language": "zh", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. 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", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . 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\u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "description_zh_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "summary": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "version": "15", "link_map": {"/zh/docs/15/libpq.html#LIBPQ-CONNECT-SSLCOMPRESSION": "/docs/15/libpq.html#LIBPQ-CONNECT-SSLCOMPRESSION"}, "body_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "body_sha256": "0745561b0c2c8d8cc33a443adcdff12acf99149b46bbd88aff5d29c9b8cb8036", "content_hash": "f8d026c0385ca9df2569d0e68bd7aec6d4ae2529b5e2f78ab122a707affecbb3", "source_database": "center", "source_revision": "6af958c6520151fc7697d56e0616b03fb00522c4568158674d452ae0644ba545"}, "signature": "sslcompression", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/15/libpq-envars.html", "text": "PGSSLCOMPRESSION"}, "description": "PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU 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\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
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If set to 0, compression will be disabled. The default is 0. 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These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/16/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/16/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults.", "/versions/16/sections/1/paragraphs/0": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter.", "/versions/16/tables/0/columns/0/label": "Variable", "/versions/16/tables/0/columns/1/label": "Documented behavior", "/versions/16/tables/0/rows/0/description": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "d3ea4ced9384a9ec5998bc165f9579118afd787e3b84c422829ef3931dc7df4c", "canonical_center_text_hash": "e1ffd5606721952848133b9fc504989915b443a5c5085b4cd02591603fcb20c1"}, "source_option": {"keyword": "sslcompression", "declaration": "\"sslcompression\", \"PGSSLCOMPRESSION\", \"0\", NULL, \"SSL-Compression\", \"\", 1, offsetof(struct pg_conn, sslcompression)", "environment": "PGSSLCOMPRESSION", "source_notes": [], "compiled_default_expression": "\"0\""}, "description_zh": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "comparison_data": {"keyword": "sslcompression", "definition": "If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made. SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disables compression by default, and many operating system distributions disable it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disables compression completely in the backend. If security is not a primary concern, compression can improve throughput if the network is the bottleneck. Disabling compression can improve response time and throughput if CPU performance is the limiting factor.", "documented": true, "environment": "PGSSLCOMPRESSION", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disables compression by default, and many operating system distributions disable it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disables compression completely in the backend."], "compiled_default_expression": "\"0\""}, "comparison_hash": "93e5db6642d9a87aa43125d28911134e358652302cfef4b0b78f3f6cb4f96b1f", "manual_language": "zh", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disables compression by default, and many operating system distributions disable it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disables compression completely in the backend."], "description_zh_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
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By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."]}, "17": {"facts": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 17.11"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "PGSSLCOMPRESSION"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "\"0\""}], "tables": [{"key": "environment", "rows": [{"name": {"url": "/docs/17/libpq-envars.html", "text": "PGSSLCOMPRESSION"}, "description": "PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "keyword": 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\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "summary": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "version": "17", "link_map": {"/zh/docs/17/libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION": "/docs/17/libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION"}, "body_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "body_sha256": "3ecba470c0a6dcee30a8d67ebc472ca78c0585c29b4ef1a882eebd79fd47a4ad", "content_hash": "e7f4c5e5fbee436413ba87f818c731d25220684e2d6950c67b464b060981964f", "source_database": "center", "source_revision": "58419c9b0dd42cb34c8d53695bb025a7e582edf55ccd4c5bcb1c2c7c71a37487"}, "signature": "sslcompression", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/17/libpq-envars.html", "text": "PGSSLCOMPRESSION"}, "description": "PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002"], "environment": [{"name": "PGSSLCOMPRESSION", "source_url": "/docs/17/libpq-envars.html", "description": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter."}], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "localization": {"status": "complete", "sources": 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If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "/versions/17/facts/0/label": "Client library", "/versions/17/facts/1/label": "Manual definition", "/versions/17/facts/1/value": "Documented", "/versions/17/facts/2/label": "Source environment fallback", "/versions/17/facts/3/label": "Compiled fallback expression", "/versions/17/tables/0/title": "Environment fallback", "/versions/17/related/0/label": "Connection service file", "/versions/17/related/1/label": "Password file", "/versions/17/related/2/label": "All libpq environment variables", "/versions/17/sections/0/title": "Default resolution and service-file precedence", "/versions/17/sections/1/title": "Environment variable evidence", "/versions/17/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/17/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/17/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults.", "/versions/17/sections/1/paragraphs/0": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter.", "/versions/17/tables/0/columns/0/label": "Variable", "/versions/17/tables/0/columns/1/label": "Documented behavior", "/versions/17/tables/0/rows/0/description": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "2f97973b7995ccc3d3a2eaa81674adcd5b6502332545b908c03ad7ae18e57234", "canonical_center_text_hash": "e7f4c5e5fbee436413ba87f818c731d25220684e2d6950c67b464b060981964f"}, "source_option": {"keyword": "sslcompression", "declaration": "\"sslcompression\", \"PGSSLCOMPRESSION\", \"0\", NULL, \"SSL-Compression\", \"\", 1, offsetof(struct pg_conn, sslcompression)", "environment": "PGSSLCOMPRESSION", "source_notes": [], "compiled_default_expression": "\"0\""}, "description_zh": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "comparison_data": {"keyword": "sslcompression", "definition": "If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made. SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend. If security is not a primary concern, compression can improve throughput if the network is the bottleneck. Disabling compression can improve response time and throughput if CPU performance is the limiting factor.", "documented": true, "environment": "PGSSLCOMPRESSION", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend."], "compiled_default_expression": "\"0\""}, "comparison_hash": "0c4c60d0f12af6d71d10bef17a4bd4ee318be6729713bccb38cf6c075eb55142", "manual_language": "zh", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend."], "description_zh_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
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\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
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\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
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By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. 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1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "description_zh_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "summary": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "version": "18", "link_map": {"/zh/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION": "/docs/18/libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION"}, "body_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "body_sha256": "a1c749ddf8da11e87b2e692897ac48aa7b8ec27ac78f0f54f68302664966eb86", "content_hash": "7920750b7b13937e6975b51e834697c3c89fcf1f01da4a47fa20a825d73e74a1", "source_database": "center", "source_revision": "ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8"}, "signature": "sslcompression", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/18/libpq-envars.html", "text": "PGSSLCOMPRESSION"}, "description": "PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002"], "environment": [{"name": "PGSSLCOMPRESSION", "source_url": "/docs/18/libpq-envars.html", "description": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter."}], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb 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If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "/versions/18/facts/0/label": "Client library", "/versions/18/facts/1/label": "Manual definition", "/versions/18/facts/1/value": "Documented", "/versions/18/facts/2/label": "Source environment fallback", "/versions/18/facts/3/label": "Compiled fallback expression", "/versions/18/tables/0/title": "Environment fallback", "/versions/18/related/0/label": "Connection service file", "/versions/18/related/1/label": "Password file", "/versions/18/related/2/label": "All libpq environment variables", "/versions/18/sections/0/title": "Default resolution and service-file precedence", "/versions/18/sections/1/title": "Environment variable evidence", "/versions/18/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/18/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/18/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults.", "/versions/18/sections/1/paragraphs/0": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter.", "/versions/18/tables/0/columns/0/label": "Variable", "/versions/18/tables/0/columns/1/label": "Documented behavior", "/versions/18/tables/0/rows/0/description": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "4837225fb89fff449a2fc805ab8914623cb5dab3aae7c62e07c60b3db2b5ddba", "canonical_center_text_hash": "7920750b7b13937e6975b51e834697c3c89fcf1f01da4a47fa20a825d73e74a1"}, "source_option": {"keyword": "sslcompression", "declaration": "\"sslcompression\", \"PGSSLCOMPRESSION\", \"0\", NULL, \"SSL-Compression\", \"\", 1, offsetof(struct pg_conn, sslcompression)", "environment": "PGSSLCOMPRESSION", "source_notes": [], "compiled_default_expression": "\"0\""}, "description_zh": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "comparison_data": {"keyword": "sslcompression", "definition": "If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made. SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend. If security is not a primary concern, compression can improve throughput if the network is the bottleneck. Disabling compression can improve response time and throughput if CPU performance is the limiting factor.", "documented": true, "environment": "PGSSLCOMPRESSION", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend."], "compiled_default_expression": "\"0\""}, "comparison_hash": "0c4c60d0f12af6d71d10bef17a4bd4ee318be6729713bccb38cf6c075eb55142", "manual_language": "zh", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend."], "description_zh_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
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\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."], "center_zh_rendered": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
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\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "summary": "\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002", "version": "20", "link_map": {"/zh/docs/devel/libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION": "/docs/devel/libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION"}, "body_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "body_sha256": "9f1ebc12078e662f7f462ee26afe4654eb6fde0b5e9670ef778d765953789c45", "content_hash": "8618678b7abd624f231c3db5b50730bc0be6bacd46a20c8cb7d87e36bbf37cf1", "source_database": "center", "source_revision": "3cd0885bb4eccdbaac1a21177cc639e9031e54bd8ea6536c45224b5563354ce2"}, "signature": "sslcompression", "tables_zh": [{"key": "environment", "rows": [{"name": {"url": "/docs/devel/libpq-envars.html", "text": "PGSSLCOMPRESSION"}, "description": "PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"}], "title": "\u73af\u5883\u53d8\u91cf\u56de\u9000", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u624b\u518c\u8bb0\u8f7d\u7684\u884c\u4e3a"}]}], "documented": true, "description": ["\u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002 SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002 OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002 PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002 \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002"], "environment": [{"name": "PGSSLCOMPRESSION", "source_url": "/docs/devel/libpq-envars.html", "description": "PGSSLCOMPRESSION behaves the same as the sslcompression connection parameter."}], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-CONNECT-SSLCOMPRESSION", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u5728 libpq \u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u4f7f\u7528 servicefile \u5173\u952e\u5b57\uff0c\u6216\u8005\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": ["PGSSLCOMPRESSION \u7684\u884c\u4e3a\u4e0e sslcompression \u8fde\u63a5\u53c2\u6570\u76f8\u540c\u3002"]}], "localization": {"status": "complete", "sources": [{"url": "/docs/devel/libpq-envars.html", "method": "same-major semantic node", "sha256": "b4afd6d100d2be289d48e1a6f6fb9804dd0b684798b7dabf8bae7d3db074117f", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/div[3]/ul[0]/li[16]", "#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/devel/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "acea589bbba517979fe815bd3bff32cd6d5e6323e1d5b4f395d7864338868b26", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/summary": "If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "/versions/20/description/0": "If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "/versions/20/facts/0/label": "Client library", "/versions/20/facts/1/label": "Manual definition", "/versions/20/facts/1/value": "Documented", "/versions/20/facts/2/label": "Source environment fallback", "/versions/20/facts/3/label": "Compiled fallback expression", "/versions/20/tables/0/title": "Environment fallback", "/versions/20/related/0/label": "Connection service file", "/versions/20/related/1/label": "Password file", "/versions/20/related/2/label": "All libpq environment variables", "/versions/20/sections/0/title": "Default resolution and service-file precedence", "/versions/20/sections/1/title": "Environment variable evidence", "/versions/20/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/20/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified using the servicefile key word in a libpq connection string or by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/20/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. 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\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
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\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
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If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made. SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend. If security is not a primary concern, compression can improve throughput if the network is the bottleneck. Disabling compression can improve response time and throughput if CPU performance is the limiting factor.", "documented": true, "environment": "PGSSLCOMPRESSION", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend."], "compiled_default_expression": "\"0\""}, "comparison_hash": "0c4c60d0f12af6d71d10bef17a4bd4ee318be6729713bccb38cf6c075eb55142", "manual_language": "zh", "default_evidence": ["If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.", "SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disabled compression by default, and many operating system distributions disabled it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. PostgreSQL 14 disabled compression completely in the backend."], "description_zh_html": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."], "center_zh_rendered": "\u8fde\u63a5\u53c2\u6570 sslcompression\u3002
\n \u5982\u679c\u8bbe\u7f6e\u4e3a 1\uff0c\u901a\u8fc7 SSL \u8fde\u63a5\u53d1\u9001\u7684\u6570\u636e\u5c06\u88ab\u538b\u7f29\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5c06\u7981\u7528\u538b\u7f29\u3002\u9ed8\u8ba4\u503c\u4e3a 0\u3002\u5982\u679c\u8fdb\u884c\u975e SSL \u8fde\u63a5\uff0c\u5219\u5ffd\u7565\u6b64\u53c2\u6570\u3002\n
\n SSL \u538b\u7f29\u73b0\u5728\u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u3002OpenSSL 1.1.0 \u9ed8\u8ba4\u7981\u7528\u538b\u7f29\uff0c\u8bb8\u591a\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u4e5f\u5728\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7981\u7528\u4e86\u538b\u7f29\uff0c\u56e0\u6b64\u5982\u679c\u670d\u52a1\u5668\u4e0d\u63a5\u53d7\u538b\u7f29\uff0c\u5c06\u6b64\u53c2\u6570\u8bbe\u7f6e\u4e3a on \u5c06\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002PostgreSQL 14 \u5728\u540e\u7aef\u5b8c\u5168\u7981\u7528\u4e86\u538b\u7f29\u3002\n
\n \u5982\u679c\u5b89\u5168\u6027\u4e0d\u662f\u4e3b\u8981\u8003\u8651\u56e0\u7d20\uff0c\u538b\u7f29\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u5982\u679c\u7f51\u7edc\u662f\u74f6\u9888\u7684\u8bdd\u3002\u5982\u679c CPU \u6027\u80fd\u662f\u9650\u5236\u56e0\u7d20\uff0c\u7981\u7528\u538b\u7f29\u53ef\u4ee5\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u5e76\u63d0\u9ad8\u541e\u5410\u91cf\u3002\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "comparison": {"left": "12", "right": "13", "status": "changed", "diff": "--- PostgreSQL 12\n+++ PostgreSQL 13\n@@ -2,9 +2,9 @@\n \"compiled_default_expression\": \"\\\"0\\\"\",\n \"default_evidence\": [\n \"If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made.\",\n- \"SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disables compression by default, and many operating system distributions disable it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. On the other hand, OpenSSL before 1.0.0 does not support disabling compression, so this parameter is ignored with those versions, and whether compression is used depends on the server.\"\n+ \"SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disables compression by default, and many operating system distributions disable it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression.\"\n ],\n- \"definition\": \"If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made. SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disables compression by default, and many operating system distributions disable it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. On the other hand, OpenSSL before 1.0.0 does not support disabling compression, so this parameter is ignored with those versions, and whether compression is used depends on the server. If security is not a primary concern, compression can improve throughput if the network is the bottleneck. Disabling compression can improve response time and throughput if CPU performance is the limiting factor.\",\n+ \"definition\": \"If set to 1, data sent over SSL connections will be compressed. If set to 0, compression will be disabled. The default is 0. This parameter is ignored if a connection without SSL is made. SSL compression is nowadays considered insecure and its use is no longer recommended. OpenSSL 1.1.0 disables compression by default, and many operating system distributions disable it in prior versions as well, so setting this parameter to on will not have any effect if the server does not accept compression. If security is not a primary concern, compression can improve throughput if the network is the bottleneck. Disabling compression can improve response time and throughput if CPU performance is the limiting factor.\",\n \"documented\": true,\n \"environment\": \"PGSSLCOMPRESSION\",\n \"keyword\": \"sslcompression\""}}