{"id":75804,"date":"2024-10-16T01:22:20","date_gmt":"2024-10-15T17:22:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75804\/"},"modified":"2024-10-16T01:22:20","modified_gmt":"2024-10-15T17:22:20","slug":"mysql-%e6%9f%a5%e8%a9%a2%e9%ab%98%e9%80%9f%e7%b7%a9%e8%a1%9dhave_query_cache%e4%b8%8d%e5%be%97%e4%b8%8d%e7%9c%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75804\/","title":{"rendered":"MySQL \u67e5\u8a62\u9ad8\u901f\u7de9\u885dhave_query_cache\u4e0d\u5f97\u4e0d\u770b"},"content":{"rendered":"<h1 id=\"mysql-%e6%9f%a5%e8%a9%a2%e9%ab%98%e9%80%9f%e7%b7%a9%e8%a1%9d-have_query_cache-%e4%b8%8d%e5%be%97%e4%b8%8d%e7%9c%8b-abuIjnjsZn\">MySQL \u67e5\u8a62\u9ad8\u901f\u7de9\u885d have_query_cache \u4e0d\u5f97\u4e0d\u770b<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002MySQL \u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u512a\u5316\u67e5\u8a62\u6027\u80fd\u7684\u529f\u80fd\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f\u67e5\u8a62\u7de9\u5b58\uff08Query Cache\uff09\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u7684\u67e5\u8a62\u7de9\u885d\u529f\u80fd\uff0c\u7279\u5225\u662f <code>have_query_cache<\/code> \u8b8a\u6578\u7684\u610f\u7fa9\u53ca\u5176\u914d\u7f6e\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%9f%a5%e8%a9%a2%e7%b7%a9%e5%ad%98%ef%bc%9f-abuIjnjsZn\">\u4ec0\u9ebc\u662f\u67e5\u8a62\u7de9\u5b58\uff1f<\/h2>\n<p>\u67e5\u8a62\u7de9\u5b58\u662f\u4e00\u7a2e\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u6280\u8853\u3002\u7576\u4e00\u500b\u67e5\u8a62\u88ab\u57f7\u884c\u6642\uff0cMySQL \u6703\u5c07\u8a72\u67e5\u8a62\u7684\u7d50\u679c\u5b58\u5132\u5728\u7de9\u5b58\u4e2d\u3002\u7576\u76f8\u540c\u7684\u67e5\u8a62\u518d\u6b21\u88ab\u57f7\u884c\u6642\uff0cMySQL \u53ef\u4ee5\u76f4\u63a5\u5f9e\u7de9\u5b58\u4e2d\u8fd4\u56de\u7d50\u679c\uff0c\u800c\u7121\u9700\u91cd\u65b0\u57f7\u884c\u67e5\u8a62\uff0c\u9019\u6a23\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002<\/p>\n<h2 id=\"have_query_cache-%e8%ae%8a%e6%95%b8%e7%9a%84%e6%84%8f%e7%be%a9-abuIjnjsZn\">have_query_cache \u8b8a\u6578\u7684\u610f\u7fa9<\/h2>\n<p><code>have_query_cache<\/code> \u662f\u4e00\u500b\u7cfb\u7d71\u8b8a\u6578\uff0c\u7528\u65bc\u6307\u793a MySQL \u662f\u5426\u652f\u6301\u67e5\u8a62\u7de9\u5b58\u3002\u9019\u500b\u8b8a\u6578\u7684\u503c\u53ef\u4ee5\u662f\u4ee5\u4e0b\u5e7e\u7a2e\uff1a<\/p>\n<ul>\n<li><code>YES<\/code>\uff1a\u8868\u793a\u652f\u6301\u67e5\u8a62\u7de9\u5b58\u3002<\/li>\n<li><code>NO<\/code>\uff1a\u8868\u793a\u4e0d\u652f\u6301\u67e5\u8a62\u7de9\u5b58\u3002<\/li>\n<li><code>DISABLED<\/code>\uff1a\u8868\u793a\u67e5\u8a62\u7de9\u5b58\u5df2\u88ab\u7981\u7528\u3002<\/li>\n<\/ul>\n<p>\u8981\u6aa2\u67e5 <code>have_query_cache<\/code> \u7684\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\uff1a<\/p>\n<pre><code>SHOW VARIABLES LIKE 'have_query_cache';<\/code><\/pre>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%95%9f%e7%94%a8%e6%9f%a5%e8%a9%a2%e7%b7%a9%e5%ad%98-abuIjnjsZn\">\u5982\u4f55\u555f\u7528\u67e5\u8a62\u7de9\u5b58<\/h2>\n<p>\u5982\u679c <code>have_query_cache<\/code> \u7684\u503c\u70ba <code>YES<\/code>\uff0c\u5247\u53ef\u4ee5\u9032\u4e00\u6b65\u914d\u7f6e\u67e5\u8a62\u7de9\u5b58\u3002\u4ee5\u4e0b\u662f\u555f\u7528\u67e5\u8a62\u7de9\u5b58\u7684\u6b65\u9a5f\uff1a<\/p>\n<ol>\n<li>\u7de8\u8f2f MySQL \u914d\u7f6e\u6587\u4ef6\uff08\u901a\u5e38\u662f <code>my.cnf<\/code> \u6216 <code>my.ini<\/code>\uff09\u3002<\/li>\n<li>\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u6dfb\u52a0\u6216\u4fee\u6539\u4ee5\u4e0b\u53c3\u6578\uff1a<\/li>\n<pre><code>[mysqld]\nquery_cache_type = 1\nquery_cache_size = 1048576<\/code><\/pre>\n<li>\u91cd\u555f MySQL \u670d\u52d9\u4ee5\u4f7f\u66f4\u6539\u751f\u6548\u3002<\/li>\n<\/ol>\n<p>\u5728\u4e0a\u8ff0\u914d\u7f6e\u4e2d\uff0c<code>query_cache_type<\/code> \u8a2d\u7f6e\u70ba <code>1<\/code> \u8868\u793a\u555f\u7528\u67e5\u8a62\u7de9\u5b58\uff0c\u800c <code>query_cache_size<\/code> \u5247\u8a2d\u7f6e\u4e86\u7de9\u5b58\u7684\u5927\u5c0f\uff08\u4ee5\u5b57\u7bc0\u70ba\u55ae\u4f4d\uff09\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e7%b7%a9%e5%ad%98%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-abuIjnjsZn\">\u67e5\u8a62\u7de9\u5b58\u7684\u512a\u7f3a\u9ede<\/h2>\n<p>\u96d6\u7136\u67e5\u8a62\u7de9\u5b58\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u4e5f\u6709\u5176\u7f3a\u9ede\uff1a<\/p>\n<h3 id=\"%e5%84%aa%e9%bb%9e-abuIjnjsZn\">\u512a\u9ede<\/h3>\n<ul>\n<li>\u6e1b\u5c11\u67e5\u8a62\u57f7\u884c\u6642\u9593\uff0c\u7279\u5225\u662f\u5c0d\u65bc\u91cd\u8907\u67e5\u8a62\u3002<\/li>\n<li>\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u8ca0\u8f09\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-abuIjnjsZn\">\u7f3a\u9ede<\/h3>\n<ul>\n<li>\u5728\u9ad8\u983b\u7387\u7684\u5beb\u5165\u64cd\u4f5c\u4e2d\uff0c\u67e5\u8a62\u7de9\u5b58\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u70ba\u6bcf\u6b21\u5beb\u5165\u90fd\u9700\u8981\u66f4\u65b0\u7de9\u5b58\u3002<\/li>\n<li>\u5c0d\u65bc\u67d0\u4e9b\u985e\u578b\u7684\u67e5\u8a62\uff08\u5982\u4f7f\u7528 <code>JOIN<\/code> \u7684\u67e5\u8a62\uff09\uff0c\u67e5\u8a62\u7de9\u5b58\u7684\u6548\u679c\u53ef\u80fd\u4e0d\u660e\u986f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-abuIjnjsZn\">\u7d50\u8ad6<\/h2>\n<p>MySQL \u7684\u67e5\u8a62\u7de9\u5b58\u529f\u80fd\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u4e86\u89e3 <code>have_query_cache<\/code> \u8b8a\u6578\u7684\u610f\u7fa9\u53ca\u5176\u914d\u7f6e\u65b9\u6cd5\uff0c\u5c0d\u65bc\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6839\u64da\u5177\u9ad4\u7684\u696d\u52d9\u9700\u6c42\u548c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u5408\u7406\u914d\u7f6e\u67e5\u8a62\u7de9\u5b58\uff0c\u53ef\u4ee5\u9054\u5230\u6700\u4f73\u7684\u6027\u80fd\u6548\u679c\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 MySQL \u67e5\u8a62\u9ad8\u901f\u7de9\u885d\u7684 have_query_cache \u53c3\u6578\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\uff0c\u512a\u5316\u67e5\u8a62\u6548\u7387\uff0c\u5fc5\u770b\u6307\u5357\uff01<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-75804","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75804","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=75804"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75804\/revisions"}],"predecessor-version":[{"id":75805,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75804\/revisions\/75805"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}