{"id":6505,"date":"2024-08-29T20:21:10","date_gmt":"2024-08-29T12:21:10","guid":{"rendered":"https:\/\/t.n-years.com\/?p=6505"},"modified":"2024-08-29T20:21:10","modified_gmt":"2024-08-29T12:21:10","slug":"innodb%e5%ad%98%e5%82%a8%e5%bc%95%e6%93%8e%e7%b4%a2%e5%bc%95%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"https:\/\/t.n-years.com\/?p=6505","title":{"rendered":"InnoDB\u5b58\u50a8\u5f15\u64ce\u7d22\u5f15\u4ecb\u7ecd"},"content":{"rendered":"<blockquote>\n<p>\u975e\u539f\u521b\u3001ChatGPT \u95ee\u7b54\u751f\u6210<\/p>\n<\/blockquote>\n<p>InnoDB \u662f MySQL \u9ed8\u8ba4\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u4e5f\u662f\u76ee\u524d\u6700\u5e38\u7528\u7684\u5b58\u50a8\u5f15\u64ce\u4e4b\u4e00\u3002\u5bf9\u4e8e\u540e\u7aef\u5de5\u7a0b\u5e08\u6765\u8bf4\uff0c\u638c\u63e1 InnoDB \u7684\u5b58\u50a8\u548c\u7d22\u5f15\u673a\u5236\u662f\u4f18\u5316\u6570\u636e\u5e93\u6027\u80fd\u7684\u5173\u952e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6838\u5fc3\u77e5\u8bc6\u70b9\uff1a<\/p>\n<h3>1. <strong>\u805a\u7c07\u7d22\u5f15\uff08Clustered Index\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: InnoDB \u4e2d\uff0c\u6bcf\u5f20\u8868\u7684\u4e3b\u952e\u5c31\u662f\u805a\u7c07\u7d22\u5f15\uff0c\u6570\u636e\u884c\u5b9e\u9645\u5b58\u50a8\u5728\u4e3b\u952e\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u4e0a\u3002<\/li>\n<li><strong>\u7279\u6027<\/strong>: \u6570\u636e\u6839\u636e\u4e3b\u952e\u7684\u987a\u5e8f\u5b58\u50a8\uff0c\u51cf\u5c11\u4e86\u6570\u636e\u548c\u7d22\u5f15\u4e4b\u95f4\u7684\u7a7a\u95f4\u6d6a\u8d39\uff0c\u67e5\u8be2\u901f\u5ea6\u66f4\u5feb\u3002<\/li>\n<li><strong>\u5f71\u54cd<\/strong>: \u975e\u4e3b\u952e\u7d22\u5f15\uff08\u8f85\u52a9\u7d22\u5f15\uff09\u5b58\u50a8\u7684\u662f\u4e3b\u952e\u503c\uff0c\u56e0\u6b64\u5728\u67e5\u8be2\u65f6\u53ef\u80fd\u4f1a\u4ea7\u751f\u4e8c\u6b21\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<h3>2. <strong>\u8f85\u52a9\u7d22\u5f15\uff08Secondary Index\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u8f85\u52a9\u7d22\u5f15\u6307\u7684\u662f\u975e\u4e3b\u952e\u7d22\u5f15\uff0c\u5728\u53f6\u5b50\u8282\u70b9\u4e2d\u5b58\u50a8\u7684\u662f\u7d22\u5f15\u5217\u7684\u503c\u548c\u5bf9\u5e94\u884c\u7684\u4e3b\u952e\u503c\u3002<\/li>\n<li><strong>\u4f7f\u7528\u573a\u666f<\/strong>: \u7528\u4e8e\u52a0\u901f\u975e\u4e3b\u952e\u5217\u7684\u67e5\u8be2\uff0c\u7279\u522b\u662f\u6d89\u53ca WHERE \u5b50\u53e5\u7684\u67e5\u8be2\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u8651<\/strong>: \u8f85\u52a9\u7d22\u5f15\u8fc7\u591a\u4f1a\u589e\u52a0\u5b58\u50a8\u7a7a\u95f4\u7684\u5360\u7528\uff0c\u5e76\u4e14\u4f1a\u5f71\u54cd INSERT\u3001UPDATE\u3001DELETE \u64cd\u4f5c\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h3>3. <strong>B+ \u6811\u7d22\u5f15<\/strong><\/h3>\n<ul>\n<li><strong>\u7ed3\u6784<\/strong>: InnoDB \u7d22\u5f15\u4f7f\u7528 B+ \u6811\u7ed3\u6784\uff0c\u5176\u4e2d\u6bcf\u4e2a\u8282\u70b9\u5b58\u50a8\u7684\u662f\u7d22\u5f15\u952e\u503c\u53ca\u5176\u5bf9\u5e94\u7684\u6570\u636e\u9875\u3002<\/li>\n<li><strong>\u4f18\u70b9<\/strong>: B+ \u6811\u53ef\u4ee5\u4fdd\u6301\u6570\u636e\u7684\u987a\u5e8f\uff0c\u4e14\u80fd\u591f\u9ad8\u6548\u5730\u8fdb\u884c\u8303\u56f4\u67e5\u8be2\u3002<\/li>\n<li><strong>\u4f18\u5316<\/strong>: \u9009\u62e9\u5408\u9002\u7684\u5217\u4f5c\u4e3a\u7d22\u5f15\u53ef\u4ee5\u51cf\u5c11\u6811\u7684\u9ad8\u5ea6\uff0c\u8fdb\u800c\u51cf\u5c11\u78c1\u76d8 I\/O \u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h3>4. <strong>\u8986\u76d6\u7d22\u5f15\uff08Covering Index\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u5982\u679c\u4e00\u4e2a\u7d22\u5f15\u5305\u542b\u4e86\u6240\u6709\u67e5\u8be2\u9700\u8981\u7684\u5b57\u6bb5\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7d22\u5f15\u88ab\u79f0\u4e3a\u8986\u76d6\u7d22\u5f15\u3002<\/li>\n<li><strong>\u597d\u5904<\/strong>: \u8986\u76d6\u7d22\u5f15\u53ef\u4ee5\u907f\u514d\u56de\u8868\u64cd\u4f5c\uff0c\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\u3002<\/li>\n<li><strong>\u793a\u4f8b<\/strong>: \u5bf9 <code>SELECT<\/code> \u67e5\u8be2\u6d89\u53ca\u7684\u591a\u4e2a\u5b57\u6bb5\u521b\u5efa\u7ec4\u5408\u7d22\u5f15\u3002<\/li>\n<\/ul>\n<h3>5. <strong>\u524d\u7f00\u7d22\u5f15\uff08Prefix Index\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u5728\u957f\u6587\u672c\u5b57\u6bb5\u4e0a\u521b\u5efa\u7d22\u5f15\u65f6\uff0c\u53ef\u4ee5\u53ea\u4f7f\u7528\u5b57\u6bb5\u7684\u524d\u7f00\u6765\u521b\u5efa\u7d22\u5f15\u3002<\/li>\n<li><strong>\u573a\u666f<\/strong>: \u9002\u7528\u4e8e\u957f\u5b57\u7b26\u4e32\u5b57\u6bb5\uff0c\u6bd4\u5982 URL \u6216\u8005\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u3002<\/li>\n<li><strong>\u9650\u5236<\/strong>: \u524d\u7f00\u7d22\u5f15\u65e0\u6cd5\u7528\u4e8e ORDER BY \u64cd\u4f5c\uff0c\u4e14\u5176\u9009\u62e9\u6027\u8f83\u5dee\u3002<\/li>\n<\/ul>\n<h3>6. <strong>\u552f\u4e00\u7d22\u5f15\uff08Unique Index\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u552f\u4e00\u7d22\u5f15\u8981\u6c42\u7d22\u5f15\u5217\u7684\u503c\u5fc5\u987b\u552f\u4e00\u3002<\/li>\n<li><strong>\u7528\u9014<\/strong>: \u9632\u6b62\u91cd\u590d\u6570\u636e\u7684\u63d2\u5165\uff0c\u4e14\u53ef\u4ee5\u52a0\u5feb\u7b49\u503c\u67e5\u8be2\u7684\u901f\u5ea6\u3002<\/li>\n<li><strong>\u6ce8\u610f<\/strong>: \u552f\u4e00\u7d22\u5f15\u4e0d\u5141\u8bb8\u5728\u5176\u4e2d\u5b58\u50a8\u591a\u4e2a NULL \u503c\u3002<\/li>\n<\/ul>\n<h3>7. <strong>\u5168\u6587\u7d22\u5f15\uff08Full-Text Index\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: \u5168\u6587\u7d22\u5f15\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u6587\u672c\u6570\u636e\u4e2d\u7684\u5173\u952e\u8bcd\uff0c\u9002\u7528\u4e8e <code>MATCH AGAINST<\/code> \u67e5\u8be2\u3002<\/li>\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>: \u9002\u7528\u4e8e\u957f\u6587\u672c\u5b57\u6bb5\u7684\u641c\u7d22\uff0c\u6bd4\u5982\u535a\u5ba2\u5185\u5bb9\u6216\u4ea7\u54c1\u63cf\u8ff0\u3002<\/li>\n<li><strong>\u5c40\u9650\u6027<\/strong>: \u4e0d\u652f\u6301\u6240\u6709\u6570\u636e\u7c7b\u578b\uff0c\u5e76\u4e14\u5728\u6d77\u91cf\u6570\u636e\u4e2d\u6027\u80fd\u53ef\u80fd\u4e0d\u5982\u4e13\u95e8\u7684\u641c\u7d22\u5f15\u64ce\u3002<\/li>\n<\/ul>\n<h3>8. <strong>\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15\uff08Adaptive Hash Index, AHI\uff09<\/strong><\/h3>\n<ul>\n<li><strong>\u5b9a\u4e49<\/strong>: InnoDB \u4f1a\u81ea\u52a8\u76d1\u63a7 B+ \u6811\u7684\u4f7f\u7528\u60c5\u51b5\uff0c\u5e76\u5728\u70ed\u70b9\u533a\u57df\u521b\u5efa\u54c8\u5e0c\u7d22\u5f15\u3002<\/li>\n<li><strong>\u597d\u5904<\/strong>: \u53ef\u4ee5\u52a0\u901f\u67d0\u4e9b\u70ed\u70b9\u6570\u636e\u7684\u67e5\u8be2\uff0c\u800c\u4e0d\u9700\u8981\u624b\u52a8\u521b\u5efa\u989d\u5916\u7d22\u5f15\u3002<\/li>\n<li><strong>\u63a7\u5236<\/strong>: \u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u53c2\u6570 <code>innodb_adaptive_hash_index<\/code> \u6765\u542f\u7528\u6216\u7981\u7528 AHI\u3002<\/li>\n<\/ul>\n<h3>9. <strong>\u7d22\u5f15\u4f18\u5316<\/strong><\/h3>\n<ul>\n<li><strong>\u7ec4\u5408\u7d22\u5f15<\/strong>: \u4e3a\u591a\u5217\u67e5\u8be2\u521b\u5efa\u7ec4\u5408\u7d22\u5f15\uff0c\u53ef\u4ee5\u51cf\u5c11\u5355\u72ec\u5217\u7d22\u5f15\u5e26\u6765\u7684\u6027\u80fd\u5f00\u9500\u3002<\/li>\n<li><strong>\u907f\u514d\u5197\u4f59\u7d22\u5f15<\/strong>: \u4e0d\u8981\u4e3a\u540c\u4e00\u5217\u521b\u5efa\u591a\u4e2a\u529f\u80fd\u76f8\u4f3c\u7684\u7d22\u5f15\uff0c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u7ef4\u62a4\u5f00\u9500\u3002<\/li>\n<li><strong>\u76d1\u63a7\u4e0e\u5206\u6790<\/strong>: \u4f7f\u7528 <code>EXPLAIN<\/code> \u547d\u4ee4\u5206\u6790\u67e5\u8be2\u6267\u884c\u8ba1\u5212\uff0c\u4e86\u89e3\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\u5e76\u8fdb\u884c\u4f18\u5316\u3002<\/li>\n<\/ul>\n<h3>10. <strong>\u9501\u673a\u5236<\/strong><\/h3>\n<ul>\n<li><strong>\u884c\u7ea7\u9501<\/strong>: InnoDB \u4f7f\u7528\u884c\u7ea7\u9501\u6765\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\uff0c\u4f46\u9501\u51b2\u7a81\u4ecd\u7136\u53ef\u80fd\u5f71\u54cd\u7d22\u5f15\u7684\u6548\u7387\u3002<\/li>\n<li><strong>\u9501\u5347\u7ea7<\/strong>: \u5982\u679c\u884c\u7ea7\u9501\u5347\u7ea7\u4e3a\u8868\u7ea7\u9501\uff0c\u53ef\u80fd\u5bfc\u81f4\u5927\u8303\u56f4\u7684\u6027\u80fd\u95ee\u9898\uff0c\u5c24\u5176\u662f\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e2d\u3002<\/li>\n<\/ul>\n<h3>\u7ed3\u8bba<\/h3>\n<p>\u638c\u63e1 InnoDB \u7684\u7d22\u5f15\u673a\u5236\u80fd\u591f\u6709\u6548\u5730\u63d0\u5347\u6570\u636e\u5e93\u7684\u8bfb\u5199\u6027\u80fd\u3002\u719f\u6089\u4e0d\u540c\u7d22\u5f15\u7684\u7279\u70b9\u53ca\u5176\u9002\u7528\u573a\u666f\uff0c\u5bf9\u4e8e\u8bbe\u8ba1\u9ad8\u6548\u7684\u6570\u636e\u8868\u7ed3\u6784\u81f3\u5173\u91cd\u8981\u3002\u5b9a\u671f\u8fdb\u884c\u7d22\u5f15\u4f18\u5316\u548c\u67e5\u8be2\u5206\u6790\u4e5f\u662f\u4fdd\u6301\u6570\u636e\u5e93\u6027\u80fd\u7684\u826f\u597d\u4e60\u60ef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u975e\u539f\u521b\u3001ChatGPT \u95ee\u7b54\u751f\u6210 InnoDB \u662f MySQL \u9ed8\u8ba4\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u4e5f\u662f\u76ee\u524d\u6700\u5e38\u7528\u7684\u5b58\u50a8\u5f15\u64ce\u4e4b\u4e00\u3002&#8230; <\/p>\n<div class=\"read-more navbutton\"><a href=\"https:\/\/t.n-years.com\/?p=6505\">\u9605\u8bfb\u66f4\u591a<i class=\"fa fa-angle-double-right\"><\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[123],"tags":[152,126,108],"class_list":["post-6505","post","type-post","status-publish","format-standard","hentry","category-123","tag-innodb","tag-mysql","tag-108"],"_links":{"self":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/6505","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6505"}],"version-history":[{"count":1,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/6505\/revisions"}],"predecessor-version":[{"id":6506,"href":"https:\/\/t.n-years.com\/index.php?rest_route=\/wp\/v2\/posts\/6505\/revisions\/6506"}],"wp:attachment":[{"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/t.n-years.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}