{"id":23804,"date":"2026-06-10T14:46:01","date_gmt":"2026-06-10T06:46:01","guid":{"rendered":"https:\/\/ab123.xyz\/?p=23804"},"modified":"2026-06-10T14:46:01","modified_gmt":"2026-06-10T06:46:01","slug":"%e9%98%bf%e9%87%8c%e4%ba%91%e6%95%b0%e6%8d%ae%e5%ba%93-polardb-%e5%90%91%e9%87%8f%e6%a3%80%e7%b4%a2%e6%80%a7%e8%83%bd%e8%b0%83%e4%bc%98%e6%89%8b%e5%86%8c-2","status":"publish","type":"post","link":"https:\/\/ab123.xyz\/?p=23804","title":{"rendered":"\u963f\u91cc\u4e91\u6570\u636e\u5e93 PolarDB \u5411\u91cf\u68c0\u7d22\u6027\u80fd\u8c03\u4f18\u624b\u518c"},"content":{"rendered":"

\u5728\u4eba\u5de5\u667a\u80fd\u4e0e\u5927\u6a21\u578b\u5e94\u7528\u5feb\u901f\u666e\u53ca\u7684\u80cc\u666f\u4e0b\uff0c\u5411\u91cf\u68c0\u7d22\u5df2\u6210\u4e3a\u652f\u6491\u56fe\u50cf\u8bc6\u522b\u3001\u81ea\u7136\u8bed\u8a00\u5904\u7406\u3001\u63a8\u8350\u7cfb\u7edf\u7b49\u573a\u666f\u7684\u6838\u5fc3\u6280\u672f\u3002\u963f\u91cc\u4e91\u6570\u636e\u5e93 PolarDB \u51ed\u501f\u5176\u5206\u5e03\u5f0f\u67b6\u6784\u4e0e\u9ad8\u6027\u80fd\u5411\u91cf\u68c0\u7d22\u80fd\u529b\uff0c\u4e3a\u4f01\u4e1a\u63d0\u4f9b\u4e86\u9ad8\u6548\u3001\u7a33\u5b9a\u7684\u6570\u636e\u670d\u52a1\u3002\u672c\u624b\u518c\u65e8\u5728\u5e2e\u52a9\u5f00\u53d1\u8005\u7cfb\u7edf\u638c\u63e1 PolarDB \u5411\u91cf\u68c0\u7d22\u7684\u6027\u80fd\u8c03\u4f18\u65b9\u6cd5\uff0c\u5145\u5206\u53d1\u6325\u5176\u5728\u6d77\u91cf\u6570\u636e\u4e0b\u7684\u68c0\u7d22\u4f18\u52bf\u3002<\/p>\n

\u5b98\u65b9\u7f51\u7ad9<\/a><\/p>\n

\u5411\u91cf\u68c0\u7d22\u529f\u80fd\u6982\u8ff0<\/h2>\n

PolarDB \u5411\u91cf\u68c0\u7d22\u57fa\u4e8e PostgreSQL \u751f\u6001\uff0c\u652f\u6301\u591a\u79cd\u5411\u91cf\u76f8\u4f3c\u5ea6\u7b97\u6cd5\uff08\u5982\u6b27\u6c0f\u8ddd\u79bb\u3001\u4f59\u5f26\u76f8\u4f3c\u5ea6\uff09\u4ee5\u53ca\u7d22\u5f15\u7c7b\u578b\uff08IVFFlat\u3001HNSW\uff09\u3002\u901a\u8fc7\u5c06\u975e\u7ed3\u6784\u5316\u6570\u636e\u8f6c\u5316\u4e3a\u9ad8\u7ef4\u5411\u91cf\uff0c\u7528\u6237\u53ef\u4ee5\u5728\u6beb\u79d2\u7ea7\u5185\u5b8c\u6210\u8fd1\u4f3c\u6700\u8fd1\u90bb\u641c\u7d22\u3002\u8be5\u529f\u80fd\u65e0\u9700\u989d\u5916\u90e8\u7f72\u4e13\u7528\u5411\u91cf\u6570\u636e\u5e93\uff0c\u964d\u4f4e\u4e86\u8fd0\u7ef4\u590d\u6742\u5ea6\u3002<\/p>\n

\u6027\u80fd\u8c03\u4f18\u6838\u5fc3\u7b56\u7565<\/h2>\n

\u7d22\u5f15\u53c2\u6570\u4f18\u5316<\/h3>\n
    \n
  • IVFFlat \u7d22\u5f15<\/strong>\uff1a\u8c03\u6574 lists \u53c2\u6570\uff08\u5efa\u8bae\u4e3a sqrt(\u6570\u636e\u91cf) \u7684 1-2 \u500d\uff09\uff0c\u5e73\u8861\u53ec\u56de\u7387\u4e0e\u67e5\u8be2\u901f\u5ea6\u3002<\/li>\n
  • HNSW \u7d22\u5f15<\/strong>\uff1a\u589e\u5927 ef_construction\uff08\u6784\u5efa\u65f6\u7cbe\u5ea6\uff09\u548c M\uff08\u8fde\u63a5\u6570\uff09\uff0c\u53ef\u63d0\u5347\u68c0\u7d22\u7cbe\u5ea6\u4f46\u4f1a\u589e\u52a0\u5185\u5b58\u5f00\u9500\u3002<\/li>\n<\/ul>\n

    \u67e5\u8be2\u53c2\u6570\u914d\u7f6e<\/h3>\n
      \n
    • \u8bbe\u7f6e\u5408\u9002\u7684 ef_search \u503c\uff08HNSW \u7d22\u5f15\uff09\uff0c\u63a7\u5236\u641c\u7d22\u8303\u56f4\uff0c\u5efa\u8bae\u4ece 100 \u5f00\u59cb\u8c03\u4f18\u3002<\/li>\n
    • \u4f7f\u7528 approximate= \u53c2\u6570\u52a8\u6001\u8c03\u6574\u7cbe\u5ea6\u8981\u6c42\uff0c\u9002\u5e94\u4e0d\u540c\u4e1a\u52a1\u573a\u666f\u3002<\/li>\n<\/ul>\n

      \u786c\u4ef6\u4e0e\u90e8\u7f72\u8c03\u4f18<\/h3>\n
        \n
      • \u4e3a PolarDB \u96c6\u7fa4\u914d\u7f6e\u8db3\u591f\u7684\u5185\u5b58\uff08\u5411\u91cf\u6570\u636e\u5e38\u9a7b\u5185\u5b58\u53ef\u5927\u5e45\u63d0\u5347\u6027\u80fd\uff09\u3002<\/li>\n
      • \u9009\u62e9\u9ad8 IOPS \u7684\u4e91\u76d8\uff08\u5982 ESSD\uff09\uff0c\u51cf\u5c11\u5411\u91cf\u8bfb\u53d6\u65f6\u7684\u78c1\u76d8\u5ef6\u8fdf\u3002<\/li>\n
      • \u5229\u7528 PolarDB \u7684\u8bfb\u5199\u5206\u79bb\u529f\u80fd\uff0c\u5c06\u5411\u91cf\u68c0\u7d22\u8d1f\u8f7d\u5206\u914d\u81f3\u53ea\u8bfb\u8282\u70b9\u3002<\/li>\n<\/ul>\n

        \u5178\u578b\u5e94\u7528\u573a\u666f<\/h2>\n

        PolarDB \u5411\u91cf\u68c0\u7d22\u5df2\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7535\u5546\u76f8\u4f3c\u5546\u54c1\u641c\u7d22\u3001\u667a\u80fd\u5ba2\u670d\u8bed\u4e49\u5339\u914d\u3001\u89c6\u9891\u5185\u5bb9\u63a8\u8350\u7b49\u573a\u666f\u3002\u4f8b\u5982\uff0c\u7535\u5546\u5e73\u53f0\u53ef\u5c06\u5546\u54c1\u56fe\u7247\u7279\u5f81\u5411\u91cf\u5316\u540e\u5b58\u50a8\u5728 PolarDB \u4e2d\uff0c\u901a\u8fc7\u5411\u91cf\u68c0\u7d22\u5b9e\u73b0\u201c\u4ee5\u56fe\u641c\u56fe\u201d\u529f\u80fd\uff0c\u54cd\u5e94\u65f6\u95f4\u4f4e\u4e8e 50 \u6beb\u79d2\u3002\u5728\u91d1\u878d\u9886\u57df\uff0c\u673a\u6784\u5229\u7528\u5411\u91cf\u68c0\u7d22\u8fdb\u884c\u53cd\u6b3a\u8bc8\u6837\u672c\u5339\u914d\uff0c\u663e\u8457\u63d0\u5347\u5b9e\u65f6\u98ce\u63a7\u6548\u7387\u3002<\/p>\n

        \u4f7f\u7528\u5efa\u8bae\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h2>\n

        \u6570\u636e\u9884\u5904\u7406<\/h3>\n

        \u6e05\u6d17\u548c\u5f52\u4e00\u5316\u5411\u91cf\u6570\u636e\uff0c\u907f\u514d\u566a\u58f0\u5f71\u54cd\u68c0\u7d22\u51c6\u786e\u6027\u3002\u5efa\u8bae\u4f7f\u7528\u4e3b\u6d41\u7684 embedding \u6a21\u578b\uff08\u5982 OpenAI\u3001Bert\uff09\u751f\u6210 256-512 \u7ef4\u5411\u91cf\u3002<\/p>\n

        \u76d1\u63a7\u4e0e\u8fed\u4ee3<\/h3>\n

        \u5229\u7528 PolarDB \u7684\u6162\u67e5\u8be2\u65e5\u5fd7\u548c\u6027\u80fd\u76d1\u63a7\u9762\u677f\uff0c\u5b9a\u671f\u5206\u6790\u68c0\u7d22\u8017\u65f6\u3002\u901a\u8fc7 A\/B \u6d4b\u8bd5\u5bf9\u6bd4\u4e0d\u540c\u7d22\u5f15\u53c2\u6570\u5bf9\u4e1a\u52a1\u6307\u6807\uff08\u5982\u70b9\u51fb\u7387\uff09\u7684\u5f71\u54cd\uff0c\u6301\u7eed\u4f18\u5316\u914d\u7f6e\u3002<\/p>\n

        \u901a\u8fc7\u4e0a\u8ff0\u8c03\u4f18\u624b\u6bb5\uff0c\u4f01\u4e1a\u53ef\u4ee5\u5145\u5206\u91ca\u653e PolarDB \u5411\u91cf\u68c0\u7d22\u7684\u6f5c\u529b\uff0c\u5728\u4fdd\u8bc1\u9ad8\u7cbe\u5ea6\u7684\u540c\u65f6\u5b9e\u73b0\u6781\u4f4e\u5ef6\u8fdf\u7684\u5728\u7ebf\u670d\u52a1\u3002\u5982\u9700\u83b7\u53d6\u6700\u65b0\u7248\u672c\u7684\u8c03\u4f18\u6587\u6863\u548c\u6848\u4f8b\uff0c\u8bf7\u8bbf\u95ee\u963f\u91cc\u4e91\u5b98\u65b9\u5e2e\u52a9\u4e2d\u5fc3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

        \u5728\u4eba\u5de5\u667a\u80fd\u4e0e\u5927\u6a21\u578b\u5e94\u7528\u5feb\u901f\u666e\u53ca\u7684\u80cc\u666f\u4e0b\uff0c\u5411\u91cf\u68c0\u7d22\u5df2\u6210\u4e3a\u652f\u6491\u56fe\u50cf\u8bc6\u522b\u3001\u81ea\u7136\u8bed\u8a00\u5904\u7406\u3001\u63a8\u8350\u7cfb\u7edf\u7b49\u573a\u666f\u7684\u6838\u5fc3\u6280\u672f\u3002\u963f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[26751,26749,10183,9441,26750],"class_list":["post-23804","post","type-post","status-publish","format-standard","hentry","category-4","tag-hnsw","tag-polardb","tag-10183","tag-9441","tag-26750"],"_links":{"self":[{"href":"https:\/\/ab123.xyz\/index.php?rest_route=\/wp\/v2\/posts\/23804","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ab123.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ab123.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ab123.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ab123.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=23804"}],"version-history":[{"count":1,"href":"https:\/\/ab123.xyz\/index.php?rest_route=\/wp\/v2\/posts\/23804\/revisions"}],"predecessor-version":[{"id":23805,"href":"https:\/\/ab123.xyz\/index.php?rest_route=\/wp\/v2\/posts\/23804\/revisions\/23805"}],"wp:attachment":[{"href":"https:\/\/ab123.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=23804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ab123.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=23804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ab123.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=23804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}