{"id":1161,"date":"2021-03-16T09:48:01","date_gmt":"2021-03-16T01:48:01","guid":{"rendered":"http:\/\/www.rain1024.com\/?p=1161"},"modified":"2023-08-07T20:57:23","modified_gmt":"2023-08-07T12:57:23","slug":"mysql%e6%9f%a5%e8%af%a2%e7%bc%93%e5%ad%98%e4%b8%8einnodb%e5%bc%95%e6%93%8e%e7%9a%84%e8%87%aa%e9%80%82%e5%ba%94%e5%93%88%e5%b8%8c%e7%b4%a2%e5%bc%95","status":"publish","type":"post","link":"http:\/\/rain1024.com\/index.php\/2021\/03\/16\/mysql%e6%9f%a5%e8%af%a2%e7%bc%93%e5%ad%98%e4%b8%8einnodb%e5%bc%95%e6%93%8e%e7%9a%84%e8%87%aa%e9%80%82%e5%ba%94%e5%93%88%e5%b8%8c%e7%b4%a2%e5%bc%95\/","title":{"rendered":"MySQL\u67e5\u8be2\u7f13\u5b58\u4e0eInnodb\u5f15\u64ce\u7684\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15"},"content":{"rendered":"<p>MySQL\u67e5\u8be2\u7f13\u5b58\u4e0eInnodb\u5f15\u64ce\u7684\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15<\/p>\n<h3>\u67e5\u8be2\u7f13\u5b58<\/h3>\n<h4>\u6267\u884c\u8fc7\u7a0b<\/h4>\n<p>MySQL\u4e0e\u5f15\u64ce\u4e4b\u95f4\u66f4\u50cf\u662f\u4e24\u5957\u4f53\u7cfb\uff0c\u76f8\u4e92\u4e4b\u95f4\u534f\u540c\u63d0\u4f9b\u66f4\u597d\u7684\u6570\u636e\u670d\u52a1\uff0c\u67e5\u8be2\u7f13\u5b58\u662fMySQL\u57288.0\u7248\u672c\u4e4b\u524d\u63d0\u4f9b\u7684\u4e00\u4e2a\u7279\u6027\uff0c\u5f53\u5ba2\u6237\u7aef\u4e0e\u6570\u636e\u5e93\u8fde\u63a5\u5b8c\u6bd5\uff0c\u9700\u8981\u6267\u884c\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u67e5\u8be2\u7f13\u5b58\u5c31\u4f1a\u53d1\u6325\u4f5c\u7528\uff0cMySQL\u4f1a\u5c06\u67e5\u8be2\u8bed\u53e5\u8fdb\u884c\u5bf9\u6bd4\uff0c\u5982\u679c\u4e4b\u524d\u6267\u884c\u8fc7\u8be5\u8bed\u53e5\uff0c\u6267\u884c\u8bed\u53e5\u548c\u6267\u884c\u7ed3\u679c\u4f1a\u4ee5\u952e\u503c\u5bf9\u7684\u5f62\u5f0f\u88ab\u76f4\u63a5\u7f13\u5b58\u5230\u5185\u5b58\u91cc\uff0c\u56e0\u4e3a\u4f7f\u7528\u67e5\u8be2\u8bed\u53e5\u4f5c\u4e3akey\uff0cMySQL\u53ef\u4ee5\u7528\u8bed\u53e5\u6765\u67e5\u8be2\u5bf9\u5e94\u7684key\uff0c\u5728\u7f13\u5b58\u4e2d\u627e\u5230\u7684\u8bdd\uff0c\u5c31\u53ef\u4ee5\u5c06key\u5bf9\u5e94value\u7684\u503c\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\uff0c\u5c11\u53bb\u4e86\u540e\u6765\u518d\u901a\u8fc7\u5206\u6790\u5668\uff0c\u4f18\u5316\u5668\uff0c\u6267\u884c\u5668\uff0c\u5f15\u64ce\u7b49\u5404\u4e2a\u9636\u6bb5\u590d\u6742\u7684\u5904\u7406\u3002<\/p>\n<h4>\u503c\u5f97\u5e9f\u5f03<\/h4>\n<p>\u901a\u8fc7\u4e0a\u9762\u7684\u6267\u884c\u8fc7\u7a0b\u5c31\u80fd\u770b\u51fa\u4e00\u4e9b\u95ee\u9898\uff0c\u9996\u5148\u7f13\u5b58\u8bed\u53e5\u7684\u201c\u8303\u56f4\u201d\u592a\u5927\u4e86\uff0c\u56e0\u4e3a\u4e0d\u540c\u7684\u8bed\u53e5\u53ef\u80fd\u4f1a\u6d89\u53ca\u5f88\u591a\u590d\u6742\u590d\u5408\u67e5\u8be2\uff0c\u7b80\u5355\u7c97\u66b4\u7684\u7f13\u5b58\u8d77\u6765\u7684\u540e\u679c\u662f\uff0c\u6bcf\u5f53\u6709\u5bf9\u8868\u7684\u66f4\u65b0\uff0c\u8fd9\u4e2a\u8868\u4e0a\u6240\u6709\u7684\u67e5\u8be2\u7f13\u5b58\u90fd\u4f1a\u88ab\u6e05\u7a7a\uff0c\u5982\u679c\u662f\u9891\u7e41\u66f4\u65b0\u7684\u6570\u636e\u8868\uff0c\u67e5\u8be2\u7f13\u5b58\u7684\u5931\u6548\u4e5f\u4f1a\u7279\u522b\u9891\u7e41\uff0c\u8fd9\u65f6\u57fa\u672c\u6ca1\u6709\u4f7f\u7528\u7684\u610f\u4e49\u4e86\uff0c\u67e5\u8be2\u7f13\u5b58\u7684\u610f\u4e49\u66f4\u591a\u662f\u9488\u5bf9\u4e00\u4e9b\u56fa\u5b9a\u5185\u5bb9\u7684\u8868\uff0c\u6216\u8005\u662f\u9759\u6001\u8868\uff0c\u4f8b\u5982\u5b57\u5178\u8868\u6216\u8005\u914d\u7f6e\u8868\uff0c\u4f46\u8fd9\u6837\u53c8\u6709\u4e86\u65b0\u7684\u95ee\u9898\uff0c\u65e2\u7136\u5df2\u7ecf\u662f\u56fa\u5b9a\u7684\u6570\u636e\uff0c\u90a3\u6211\u4eec\u76f4\u63a5\u4f7f\u7528\u5176\u4ed6\u7f13\u5b58\u6570\u636e\u5e93\u591a\u597d\uff0c\u67e5\u8be2\u6548\u7387\u5feb\uff0c\u4e5f\u4e0d\u7528\u62c5\u5fc3\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u95ee\u9898\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u8981\u5728MySQL\u4e2d\u5f00\u542f\u8fd9\u4e2a\u6709\u4e9b\u9e21\u808b\u7684\u529f\u80fd\u5462\uff0c\u6240\u4ee5\u67e5\u8be2\u7f13\u5b58\u7684\u529f\u80fd\u88ab\u5927\u5927\u5c40\u9650\uff0c\u539f\u672c\u7684\u521d\u8877\u662f\u597d\u7684\uff0c\u4f46\u5230\u4e86\u5177\u4f53\u573a\u666f\u4e2d\uff0c\u5e76\u6ca1\u6709\u8fbe\u5230\u9884\u671f\u7684\u6548\u679c\u3002<\/p>\n<h3>\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15\uff08Adaptive Hash Index\uff09<\/h3>\n<h4>\u7d22\u5f15\u6761\u4ef6<\/h4>\n<p>\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15\u662fInnodb\u7684\u5173\u952e\u7279\u6027\u4e4b\u4e00\uff0c\u5176\u4ed6\u7279\u6027\u8fd8\u6709\u8bf8\u5982\uff1a<\/p>\n<ul>\n<li>\u63d2\u5165\u7f13\u5b58<\/li>\n<li>\u4e24\u6b21\u5199<\/li>\n<li>\u5f02\u6b65IO<\/li>\n<li>\u5237\u65b0\u90bb\u63a5\u9875<\/li>\n<\/ul>\n<p>\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15\u4f4d\u4e8einnodb\u7684\u7f13\u5b58\u6c60\u4e2d\uff0c\u5c5e\u4e8e\u5355\u72ec\u7684\u4e00\u5757\u5b58\u50a8\u7a7a\u95f4\uff0c\u4e0d\u53d7LRU\u5185\u5b58\u6dd8\u6c70\u673a\u5236\u5f71\u54cd\uff0c\u4e4b\u6240\u4ee5\u5c06\u67e5\u8be2\u7f13\u5b58\u548c\u54c8\u5e0c\u7d22\u5f15\u653e\u4e00\u8d77\u8bf4\uff0c\u56e0\u4e3a\u4ed6\u4eec\u7684\u539f\u7406\u90fd\u662f\u4e00\u6837\u7684\uff0c\u6839\u636e\u6761\u4ef6\u5efa\u7acb\u6307\u5b9a\u7684\u952e\u503c\u5bf9\uff0c\u4e0b\u6b21\u67e5\u8be2\u53ef\u4ee5\u901a\u8fc7\u952e\u503c\u5bf9\u6765\u76f4\u63a5\u83b7\u53d6\u7ed3\u679c\uff0c\u4f46\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15\u505a\u7684\u66f4\u52a0\u7ec6\u81f4\uff0c\u8003\u8651\u5230\u7684\u573a\u666f\u4e5f\u5f88\u591a\uff0cinnodb\u5f15\u64ce\u5bf9\u76d1\u63a7\u5bf9\u8868\u4e0a\u5404\u7d22\u5f15\u9875\u7684\u67e5\u8be2\uff0c\u5982\u679c\u89c2\u5bdf\u5230\u5efa\u7acb\u54c8\u5e0c\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\uff0c\u5219\u5efa\u7acb\u54c8\u5e0c\u7d22\u5f15\uff0c\u7d22\u5f15\u7684\u5efa\u7acb\u662f\u901a\u8fc7\u6784\u5efa\u7f13\u5b58\u6c60\u91ccB+\u6811\u9875\u6765\u7684\uff0c\u4e0d\u5bf9\u6574\u5f20\u8868\u6784\u5efa\u7d22\u5f15\uff0c\u6240\u4ee5\u901f\u5ea6\u5f88\u5feb\u3002\u6784\u5efa\u9700\u8981\u8fbe\u5230\u4e00\u5b9a\u7684\u6761\u4ef6\uff1a<\/p>\n<ul>\n<li>\u901a\u8fc7\u4e00\u79cd\u56fa\u5b9a\u6a21\u5f0f\u7684\u67e5\u8be2\u8bed\u53e5\u8bbf\u95ee\u8be5\u9875100\u6b21<\/li>\n<li>\u9875\u901a\u8fc7\u56fa\u5b9a\u6a21\u5f0f\u8bbf\u95ee\u4e86N\u6b21\uff0c\u5176\u4e2dN=\u9875\u4e2d\u8bb0\u5f55*1\/16<\/li>\n<\/ul>\n<p>\u8bbf\u95ee\u6a21\u5f0f\u53ef\u4ee5\u662f where a=xxx\uff0c\u54c8\u5e0c\u7d22\u5f15\u53ea\u80fd\u7528\u6765\u641c\u7d22\u7b49\u503c\u7684\u67e5\u8be2\uff0c\u5bf9\u4e8e\u5176\u4ed6\u8303\u56f4\u67e5\u8be2\u662f\u4e0d\u53ef\u4ee5\u4f7f\u7528\u7684\uff0c\u5b98\u65b9\u6587\u6863\u663e\u793a\uff0c\u542f\u52a8\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15\uff0c\u8bfb\u53d6\u548c\u5199\u5165\u901f\u5ea6\u53ef\u4ee5\u63d0\u9ad82\u500d\uff0c\u8f85\u52a9\u7d22\u5f15\u7684\u8fde\u63a5\u64cd\u4f5c\u6027\u80fd\u53ef\u4ee5\u63d0\u9ad85\u500d\uff0c\u4e4b\u6240\u4ee5\u6210\u4e3a\u81ea\u9002\u5e94\uff0c\u5c31\u662f\u6574\u4e2a\u8fc7\u7a0b\u65e0\u9700\u4eba\u4e3a\u5e72\u9884\u8c03\u6574\uff0c\u5b8c\u5168\u7531\u6570\u636e\u5e93\u81ea\u8eab\u6765\u4f18\u5316\u3002\u8fd8\u4ee5\u4e3a\u901a\u8fc7\u547d\u4ee4 show engine innodb status\u6765\u67e5\u8be2\u5f53\u524d\u54c8\u5e0c\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u51b5\u3002<\/p>\n<h4>\u7d22\u5f15\u4f18\u52bf<\/h4>\n<p>\u8bf4\u5b8c\u8fd9\u4e9b\u53ef\u4ee5\u5206\u6790\u4e00\u4e0b\u4e3a\u4ec0\u4e48\u81ea\u9002\u5e94\u54c8\u5e0c\u7d22\u5f15\u8981\u6bd4\u67e5\u8be2\u7f13\u5b58\u597d\uff0c\u9996\u5148\u5b83\u7ec6\u7c92\u5ea6\u5316\u63a7\u5236\u6570\u636e\u7684\u7f13\u5b58\uff0c\u800c\u4e0d\u662f\u4e00\u6b65\u5230\u4f4d\uff0c\u53ea\u6709\u6ee1\u8db3\u6761\u4ef6\u624d\u53ef\u4ee5\u52a0\u7d22\u5f15\u7f13\u5b58\uff0c\u5b83\u7684\u4f7f\u7528\u8303\u56f4\u4e5f\u6709\u9650\uff0c\u53ea\u80fd\u5728\u7b49\u503c\u67e5\u8be2\u6761\u4ef6\u4f7f\u7528\uff0c\u4e5f\u80fd\u8fdb\u4e00\u6b65\u7f29\u5c0f\u7f13\u5b58\u533a\u95f4\uff0c\u6700\u91cd\u8981\u7684\u662f\uff0c\u5b83\u7f13\u5b58\u7684\u5e76\u4e0d\u662f\u6570\u636e\u5185\u5bb9\uff0c\u800c\u662f\u7d22\u5f15\u9875\uff0c\u8fd9\u6837\u5c31\u4e0d\u9700\u8981\u8003\u8651\u6570\u636e\u66f4\u65b0\u7684\u95ee\u9898\uff0c\u7d22\u5f15\u9875\u7684\u66f4\u65b0\uff0c\u5408\u5e76\u90fd\u6709\u63d2\u5165\u7f13\u5b58\u8fd9\u4e9b\u7279\u6027\u6765\u5b9e\u73b0\uff0c\u54c8\u5e0c\u7d22\u5f15\u53ea\u8981\u80fd\u4fdd\u8bc1\u5feb\u901f\u94fe\u63a5\u5230\u6240\u8981\u8bbf\u95ee\u7684\u7d22\u5f15\u9875\u5373\u53ef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4e0e\u5f15\u64ce\u4e4b\u95f4\u66f4\u50cf\u662f\u4e24\u5957\u4f53\u7cfb\uff0c\u76f8\u4e92\u4e4b\u95f4\u534f\u540c\u63d0\u4f9b\u66f4\u597d\u7684\u6570\u636e\u670d\u52a1\uff0c\u67e5\u8be2\u7f13\u5b58\u662fMySQL\u57288.0\u7248\u672c\u4e4b\u524d\u63d0\u4f9b\u7684\u4e00\u4e2a\u7279\u6027\uff0c\u5f53\u5ba2\u6237\u7aef\u4e0e\u6570\u636e\u5e93\u8fde\u63a5\u5b8c\u6bd5\uff0c\u9700\u8981\u6267\u884c\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u67e5\u8be2\u7f13\u5b58\u5c31\u4f1a\u53d1\u6325\u4f5c\u7528\uff0cMySQL\u4f1a\u5c06\u67e5\u8be2\u8bed\u53e5\u8fdb\u884c\u5bf9\u6bd4\uff0c\u5982\u679c\u4e4b\u524d\u6267\u884c\u8fc7\u8be5\u8bed\u53e5\uff0c\u6267\u884c\u8bed\u53e5\u548c\u6267\u884c\u7ed3\u679c\u4f1a\u4ee5\u952e\u503c\u5bf9\u7684\u5f62\u5f0f\u88ab\u76f4\u63a5\u7f13\u5b58\u5230\u5185\u5b58\u91cc\uff0c\u56e0\u4e3a\u4f7f\u7528\u67e5\u8be2\u8bed\u53e5\u4f5c\u4e3akey\uff0cMySQL\u53ef\u4ee5\u7528\u8bed\u53e5\u6765\u67e5\u8be2\u5bf9\u5e94\u7684key\uff0c\u5728\u7f13\u5b58\u4e2d\u627e\u5230\u7684\u8bdd\uff0c\u5c31\u53ef\u4ee5\u5c06key\u5bf9\u5e94value\u7684\u503c\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\uff0c\u5c11\u53bb\u4e86\u540e\u6765\u518d\u901a\u8fc7\u5206\u6790\u5668\uff0c\u4f18\u5316\u5668\uff0c\u6267\u884c\u5668\uff0c\u5f15\u64ce\u7b49\u5404\u4e2a\u9636\u6bb5\u590d\u6742\u7684\u5904\u7406\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-1161","post","type-post","status-publish","format-standard","hentry","category-mysql"],"_links":{"self":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/comments?post=1161"}],"version-history":[{"count":1,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1161\/revisions"}],"predecessor-version":[{"id":1337,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1161\/revisions\/1337"}],"wp:attachment":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/media?parent=1161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/categories?post=1161"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/tags?post=1161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}