{"id":21547,"date":"2024-01-02T11:17:23","date_gmt":"2024-01-02T11:17:23","guid":{"rendered":"https:\/\/server.hk\/blog\/21547\/"},"modified":"2024-11-14T10:30:56","modified_gmt":"2024-11-14T02:30:56","slug":"mongodb-glossary-explain-plan","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21547\/","title":{"rendered":"MongoDB \u8a5e\u5f59\u8868 &#8211; \u89e3\u91cb\u8a08\u5283"},"content":{"rendered":"<h1 id=\"mongodb-glossary-explain-plan-vLGbSCQLto\">MongoDB \u8a5e\u5f59\u8868 &#8211; \u89e3\u91cb\u8a08\u5283<\/h1>\n<p>\u5728 MongoDB \u7684\u4e16\u754c\u4e2d\uff0c\u89e3\u91cb\u8a08\u5283\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u5141\u8a31\u958b\u767c\u4eba\u54e1\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u4e86\u89e3\u6578\u64da\u5eab\u5982\u4f55\u57f7\u884c\u7279\u5b9a\u67e5\u8a62\u3002\u901a\u904e\u63d0\u4f9b\u6709\u95dc\u67e5\u8a62\u57f7\u884c\u7684\u8a73\u7d30\u4fe1\u606f\uff0c\u89e3\u91cb\u8a08\u5283\u6709\u52a9\u65bc\u512a\u5316\u67e5\u8a62\u6027\u80fd\u4e26\u6539\u5584\u6574\u9ad4\u6578\u64da\u5eab\u6548\u7387\u3002<\/p>\n<h2 id=\"understanding-the-explain-plan-vLGbSCQLto\">\u7406\u89e3\u89e3\u91cb\u8a08\u5283<\/h2>\n<p>\u7576\u5728 MongoDB \u4e2d\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u6578\u64da\u5eab\u5f15\u64ce\u6703\u751f\u6210\u4e00\u500b\u57f7\u884c\u8a08\u5283\uff0c\u6982\u8ff0\u5b83\u5c07\u63a1\u53d6\u7684\u6b65\u9a5f\u4ee5\u6aa2\u7d22\u6240\u8acb\u6c42\u7684\u6578\u64da\u3002\u89e3\u91cb\u8a08\u5283\u63d0\u4f9b\u4e86\u8a72\u57f7\u884c\u8a08\u5283\u7684\u8a73\u7d30\u5206\u89e3\uff0c\u4f7f\u7528\u6236\u80fd\u5920\u5206\u6790\u548c\u512a\u5316\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<p>\u89e3\u91cb\u8a08\u5283\u5305\u62ec\u5404\u7a2e\u968e\u6bb5\u548c\u6307\u6a19\uff0c\u63d0\u4f9b\u6709\u95dc\u67e5\u8a62\u8655\u7406\u65b9\u5f0f\u7684\u898b\u89e3\u3002\u89e3\u91cb\u8a08\u5283\u7684\u4e00\u4e9b\u95dc\u9375\u7d44\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u57f7\u884c\u968e\u6bb5\uff1a<\/strong>\u89e3\u91cb\u8a08\u5283\u6982\u8ff0\u4e86\u57f7\u884c\u67e5\u8a62\u6240\u6d89\u53ca\u7684\u4e0d\u540c\u968e\u6bb5\uff0c\u4f8b\u5982\u7d22\u5f15\u6383\u63cf\u3001\u6587\u6a94\u67e5\u627e\u3001\u6392\u5e8f\u548c\u805a\u5408\u3002<\/li>\n<li><strong>\u7d22\u5f15\u4f7f\u7528\uff1a<\/strong>\u5b83\u6307\u793a\u67e5\u8a62\u662f\u5426\u4f7f\u7528\u4e86\u4efb\u4f55\u7d22\u5f15\uff0c\u4e26\u63d0\u4f9b\u6709\u95dc\u6240\u4f7f\u7528\u7684\u5177\u9ad4\u7d22\u5f15\u7684\u4fe1\u606f\u3002<\/li>\n<li><strong>\u67e5\u8a62\u512a\u5316\uff1a<\/strong>\u89e3\u91cb\u8a08\u5283\u7a81\u51fa\u986f\u793a\u6578\u64da\u5eab\u5f15\u64ce\u6240\u57f7\u884c\u7684\u4efb\u4f55\u512a\u5316\uff0c\u4f8b\u5982\u7d22\u5f15\u4ea4\u96c6\u6216\u50c5\u7d22\u5f15\u6383\u63cf\u3002<\/li>\n<li><strong>\u7d71\u8a08\u6578\u64da\uff1a<\/strong>\u5b83\u5305\u62ec\u6709\u95dc\u67e5\u8a62\u57f7\u884c\u7684\u7d71\u8a08\u6578\u64da\uff0c\u4f8b\u5982\u6aa2\u67e5\u7684\u6587\u6a94\u6578\u91cf\u3001\u8fd4\u56de\u7684\u6587\u6a94\u6578\u91cf\u548c\u57f7\u884c\u6642\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"using-the-explain-plan-for-query-optimization-vLGbSCQLto\">\u4f7f\u7528\u89e3\u91cb\u8a08\u5283\u9032\u884c\u67e5\u8a62\u512a\u5316<\/h2>\n<p>\u89e3\u91cb\u8a08\u5283\u662f\u512a\u5316 MongoDB \u4e2d\u67e5\u8a62\u6027\u80fd\u7684\u5bf6\u8cb4\u5de5\u5177\u3002\u901a\u904e\u5206\u6790\u57f7\u884c\u8a08\u5283\uff0c\u958b\u767c\u4eba\u54e1\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u4ee5\u8b58\u5225\u6f5b\u5728\u7684\u74f6\u9838\u4e26\u505a\u51fa\u660e\u667a\u7684\u6c7a\u7b56\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u5f9e\u89e3\u91cb\u8a08\u5283\u4e2d\u53ef\u4ee5\u7372\u5f97\u7684\u4e00\u4e9b\u95dc\u9375\u898b\u89e3\uff1a<\/p>\n<ul>\n<li><strong>\u7d22\u5f15\u9078\u64c7\uff1a<\/strong>\u89e3\u91cb\u8a08\u5283\u63ed\u793a\u4e86\u6b63\u5728\u4f7f\u7528\u7684\u7d22\u5f15\u53ca\u5176\u5728\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u65b9\u9762\u7684\u6709\u6548\u6027\u3002\u5982\u679c\u8a08\u5283\u986f\u793a\u67e5\u8a62\u6b63\u5728\u57f7\u884c\u5168\u96c6\u5408\u6383\u63cf\u800c\u4e0d\u662f\u5229\u7528\u7d22\u5f15\uff0c\u5247\u53ef\u80fd\u8868\u660e\u9700\u8981\u9032\u884c\u7d22\u5f15\u512a\u5316\u3002<\/li>\n<li><strong>\u67e5\u8a62\u8907\u96dc\u6027\uff1a<\/strong>\u89e3\u91cb\u8a08\u5283\u6709\u52a9\u65bc\u8b58\u5225\u53ef\u80fd\u5f71\u97ff\u6027\u80fd\u7684\u8907\u96dc\u67e5\u8a62\u3002\u901a\u904e\u5206\u6790\u57f7\u884c\u968e\u6bb5\u548c\u6aa2\u67e5\u7684\u6587\u6a94\u6578\u91cf\uff0c\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\u6216\u8003\u616e\u5176\u4ed6\u65b9\u6cd5\u4ee5\u5be6\u73fe\u6240\u9700\u7d50\u679c\u3002<\/li>\n<li><strong>\u6392\u5e8f\u548c\u805a\u5408\uff1a<\/strong>\u5982\u679c\u67e5\u8a62\u6d89\u53ca\u6392\u5e8f\u6216\u805a\u5408\uff0c\u89e3\u91cb\u8a08\u5283\u63d0\u4f9b\u6709\u95dc\u9019\u4e9b\u64cd\u4f5c\u5982\u4f55\u57f7\u884c\u7684\u898b\u89e3\u3002\u5b83\u6709\u52a9\u65bc\u8b58\u5225\u6f5b\u5728\u7684\u6027\u80fd\u554f\u984c\uff0c\u4e26\u5efa\u8b70\u512a\u5316\u65b9\u6cd5\uff0c\u4f8b\u5982\u6dfb\u52a0\u9069\u7576\u7684\u7d22\u5f15\u6216\u4f7f\u7528\u4e0d\u540c\u7684\u805a\u5408\u7ba1\u9053\u3002<\/li>\n<\/ul>\n<h2 id=\"interpreting-the-explain-plan-output-vLGbSCQLto\">\u89e3\u91cb\u8a08\u5283\u8f38\u51fa\u7684\u89e3\u8b80<\/h2>\n<p>\u89e3\u91cb\u8a08\u5283\u7684\u8f38\u51fa\u7531\u4e00\u500b JSON \u6587\u6a94\u7d44\u6210\uff0c\u53ef\u4ee5\u8f15\u9b06\u89e3\u8b80\u4ee5\u7372\u5f97\u67e5\u8a62\u57f7\u884c\u7684\u898b\u89e3\u3002\u5b83\u5305\u62ec\u5404\u7a2e\u5b57\u6bb5\uff0c\u4f8b\u5982\u300cstage\u300d\u3001\u300cindex\u300d\u3001\u300cexecutionStats\u300d\u548c\u300cwinningPlan\u300d\uff0c\u63d0\u4f9b\u6709\u95dc\u67e5\u8a62\u8a08\u5283\u7684\u8a73\u7d30\u4fe1\u606f\u3002<\/p>\n<p>\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u4f7f\u7528\u89e3\u91cb\u8a08\u5283\u7684\u8f38\u51fa\u4f86\u8b58\u5225\u6539\u9032\u7684\u9818\u57df\uff0c\u4e26\u505a\u51fa\u660e\u667a\u7684\u6c7a\u7b56\u4ee5\u512a\u5316\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h2 id=\"conclusion-vLGbSCQLto\">\u7d50\u8ad6<\/h2>\n<p>\u89e3\u91cb\u8a08\u5283\u662f MongoDB \u751f\u614b\u7cfb\u7d71\u4e2d\u4e00\u500b\u6709\u50f9\u503c\u7684\u5de5\u5177\uff0c\u5e6b\u52a9\u958b\u767c\u4eba\u54e1\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u512a\u5316\u67e5\u8a62\u6027\u80fd\u3002\u901a\u904e\u63d0\u4f9b\u6709\u95dc\u67e5\u8a62\u57f7\u884c\u7684\u8a73\u7d30\u898b\u89e3\uff0c\u5b83\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u8b58\u5225\u74f6\u9838\u3001\u6539\u5584\u7d22\u5f15\u4f7f\u7528\u4e26\u589e\u5f37\u6574\u9ad4\u6578\u64da\u5eab\u6548\u7387\u3002<\/p>\n<p>\u7406\u89e3\u548c\u5229\u7528\u89e3\u91cb\u8a08\u5283\u53ef\u4ee5\u986f\u8457\u4fc3\u9032 MongoDB \u90e8\u7f72\u7684\u6210\u529f\uff0c\u78ba\u4fdd\u6700\u4f73\u6027\u80fd\u548c\u7121\u7e2b\u7684\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n<p>\u6709\u95dc MongoDB \u53ca\u5176\u5982\u4f55\u4f7f\u60a8\u7684\u696d\u52d9\u53d7\u76ca\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u63a2\u7d22 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u5bb6\u5c08\u6ce8\u65bc MongoDB \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\u7684\u9818\u5148 VPS \u8a17\u7ba1\u63d0\u4f9b\u5546\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB \u8a5e\u5f59\u8868 &#038;#82&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21547","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21547","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=21547"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21547\/revisions"}],"predecessor-version":[{"id":23907,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21547\/revisions\/23907"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}