{"id":176955,"date":"2024-11-08T12:38:22","date_gmt":"2024-11-08T04:38:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/176955\/"},"modified":"2024-11-08T12:38:24","modified_gmt":"2024-11-08T04:38:24","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a4-%e8%b3%87%e6%ba%90%e4%b8%8d%e8%b6%b3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/176955\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa4 &#8211; \u8cc7\u6e90\u4e0d\u8db3"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a4-%e8%b3%87%e6%ba%90%e4%b8%8d%e8%b6%b3-cmDZjETYEW\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa4 &#8211; \u8cc7\u6e90\u4e0d\u8db3<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u6578\u64da\u5eab\u6642\uff0c\u7d93\u5e38\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u201c\u8cc7\u6e90\u4e0d\u8db3\u201d\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\u3002\u9019\u7a2e\u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u7cfb\u7d71\u8cc7\u6e90\uff08\u5982\u5167\u5b58\u3001CPU\u6216\u78c1\u789f\u7a7a\u9593\uff09\u4e0d\u8db3\u800c\u5c0e\u81f4\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u8b58\u5225\u548c\u4fee\u5fa9\u9019\u4e00\u554f\u984c\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u7ba1\u7406\u5176MySQL\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"%e8%ad%98%e5%88%a5%e8%b3%87%e6%ba%90%e4%b8%8d%e8%b6%b3%e7%9a%84%e5%95%8f%e9%a1%8c-cmDZjETYEW\">\u8b58\u5225\u8cc7\u6e90\u4e0d\u8db3\u7684\u554f\u984c<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u8cc7\u6e90\u4e0d\u8db3\u7684\u932f\u8aa4\u901a\u5e38\u6703\u4ee5\u4ee5\u4e0b\u5e7e\u7a2e\u5f62\u5f0f\u51fa\u73fe\uff1a<\/p>\n<ul>\n<li><code>ERROR 1040 (08004): Too many connections<\/code><\/li>\n<li><code>ERROR 2002 (HY000): Can't connect to local MySQL server through socket<\/code><\/li>\n<li><code>ERROR 1203 (HY000): User 'username' already has max connections<\/code><\/li>\n<\/ul>\n<p>\u9019\u4e9b\u932f\u8aa4\u63d0\u793a\u901a\u5e38\u8868\u660e\u7cfb\u7d71\u7684\u9023\u63a5\u6578\u91cf\u8d85\u904e\u4e86\u8a2d\u5b9a\u7684\u4e0a\u9650\uff0c\u6216\u8005\u7cfb\u7d71\u8cc7\u6e90\u4e0d\u8db3\u4ee5\u652f\u6301\u7576\u524d\u7684\u8acb\u6c42\u3002\u8981\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\uff0c\u9996\u5148\u9700\u8981\u6aa2\u67e5\u7cfb\u7d71\u7684\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"%e6%aa%a2%e6%9f%a5%e7%b3%bb%e7%b5%b1%e8%b3%87%e6%ba%90-cmDZjETYEW\">\u6aa2\u67e5\u7cfb\u7d71\u8cc7\u6e90<\/h2>\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u6aa2\u67e5\u7cfb\u7d71\u7684\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\uff1a<\/p>\n<pre><code>top<\/code><\/pre>\n<p>\u9019\u500b\u547d\u4ee4\u53ef\u4ee5\u986f\u793a\u7576\u524d\u7cfb\u7d71\u7684CPU\u548c\u5167\u5b58\u4f7f\u7528\u60c5\u6cc1\u3002\u82e5\u767c\u73feCPU\u6216\u5167\u5b58\u4f7f\u7528\u7387\u63a5\u8fd1100%\uff0c\u5247\u53ef\u80fd\u9700\u8981\u8003\u616e\u5347\u7d1a\u786c\u9ad4\u6216\u512a\u5316\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n<h2 id=\"%e8%aa%bf%e6%95%b4mysql%e9%85%8d%e7%bd%ae-cmDZjETYEW\">\u8abf\u6574MySQL\u914d\u7f6e<\/h2>\n<p>\u5982\u679c\u78ba\u5b9a\u662fMySQL\u7684\u914d\u7f6e\u554f\u984c\uff0c\u53ef\u4ee5\u901a\u904e\u8abf\u6574\u914d\u7f6e\u6587\u4ef6\u4f86\u89e3\u6c7a\u3002MySQL\u7684\u914d\u7f6e\u6587\u4ef6\u901a\u5e38\u4f4d\u65bc<code>\/etc\/my.cnf<\/code>\u6216<code>\/etc\/mysql\/my.cnf<\/code>\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u914d\u7f6e\u53c3\u6578\uff1a<\/p>\n<ul>\n<li><code>max_connections<\/code>: \u8a2d\u5b9a\u6700\u5927\u9023\u63a5\u6578\uff0c\u9ed8\u8a8d\u70ba151\uff0c\u53ef\u4ee5\u6839\u64da\u9700\u8981\u589e\u52a0\u3002<\/li>\n<li><code>innodb_buffer_pool_size<\/code>: \u8a2d\u5b9aInnoDB\u7de9\u885d\u6c60\u7684\u5927\u5c0f\uff0c\u901a\u5e38\u5efa\u8b70\u8a2d\u7f6e\u70ba\u53ef\u7528\u5167\u5b58\u768470%-80%\u3002<\/li>\n<li><code>table_open_cache<\/code>: \u8a2d\u5b9a\u8868\u7684\u7de9\u5b58\u6578\u91cf\uff0c\u589e\u52a0\u6b64\u503c\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u589e\u52a0\u6700\u5927\u9023\u63a5\u6578\uff0c\u53ef\u4ee5\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u6dfb\u52a0\u6216\u4fee\u6539\u4ee5\u4e0b\u884c\uff1a<\/p>\n<pre><code>[mysqld]\nmax_connections = 300<\/code><\/pre>\n<p>\u4fee\u6539\u5f8c\uff0c\u9700\u91cd\u555fMySQL\u670d\u52d9\u4ee5\u4f7f\u66f4\u6539\u751f\u6548\uff1a<\/p>\n<pre><code>sudo systemctl restart mysql<\/code><\/pre>\n<h2 id=\"%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e5%92%8c%e7%b4%a2%e5%bc%95-cmDZjETYEW\">\u512a\u5316\u67e5\u8a62\u548c\u7d22\u5f15<\/h2>\n<p>\u9664\u4e86\u8abf\u6574\u914d\u7f6e\u5916\uff0c\u512a\u5316\u67e5\u8a62\u548c\u7d22\u5f15\u4e5f\u80fd\u6709\u6548\u6e1b\u5c11\u8cc7\u6e90\u6d88\u8017\u3002\u4f7f\u7528<code>EXPLAIN<\/code>\u547d\u4ee4\u4f86\u5206\u6790\u67e5\u8a62\u6027\u80fd\uff0c\u627e\u51fa\u53ef\u80fd\u7684\u74f6\u9838\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>EXPLAIN SELECT * FROM your_table WHERE your_column = 'value';<\/code><\/pre>\n<p>\u6839\u64da\u5206\u6790\u7d50\u679c\uff0c\u53ef\u4ee5\u8003\u616e\u6dfb\u52a0\u7d22\u5f15\u6216\u91cd\u5beb\u67e5\u8a62\u4ee5\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<h2 id=\"%e7%9b%a3%e6%8e%a7%e5%92%8c%e7%b6%ad%e8%ad%b7-cmDZjETYEW\">\u76e3\u63a7\u548c\u7dad\u8b77<\/h2>\n<p>\u5b9a\u671f\u76e3\u63a7MySQL\u7684\u6027\u80fd\u548c\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u76e3\u63a7\u5de5\u5177\uff0c\u5982<code>MySQL Workbench<\/code>\u6216<code>phpMyAdmin<\/code>\uff0c\u4f86\u8ddf\u8e64\u6578\u64da\u5eab\u7684\u6027\u80fd\u6307\u6a19\uff0c\u53ca\u6642\u767c\u73fe\u554f\u984c\u4e26\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-cmDZjETYEW\">\u7e3d\u7d50<\/h2>\n<p>\u4fee\u5fa9MySQL\u7684\u201c\u8cc7\u6e90\u4e0d\u8db3\u201d\u932f\u8aa4\u9700\u8981\u5f9e\u591a\u65b9\u9762\u5165\u624b\uff0c\u5305\u62ec\u6aa2\u67e5\u7cfb\u7d71\u8cc7\u6e90\u3001\u8abf\u6574MySQL\u914d\u7f6e\u3001\u512a\u5316\u67e5\u8a62\u548c\u7d22\u5f15\uff0c\u4ee5\u53ca\u5b9a\u671f\u76e3\u63a7\u6578\u64da\u5eab\u6027\u80fd\u3002\u901a\u904e\u9019\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8MySQL\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u6b63\u5e38\u904b\u884c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u9019\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa4\uff1a\u8cc7\u6e90\u4e0d\u8db3\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\uff0c\u512a\u5316\u914d\u7f6e\uff0c\u78ba\u4fdd\u7a69\u5b9a\u904b\u884c\u3002<\/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-176955","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176955","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=176955"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176955\/revisions"}],"predecessor-version":[{"id":176956,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176955\/revisions\/176956"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=176955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=176955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=176955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}