{"id":8902,"date":"2025-04-18T17:02:32","date_gmt":"2025-04-18T09:02:32","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/8902.html"},"modified":"2025-04-18T17:02:32","modified_gmt":"2025-04-18T09:02:32","slug":"mysql-%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%8f%82%e6%95%b0%e8%b0%83%e4%bc%98%ef%bc%9a%e8%bf%9e%e6%8e%a5%e6%b1%a0%e7%ae%a1%e7%90%86%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/8902.html","title":{"rendered":"MySQL \u670d\u52a1\u5668\u53c2\u6570\u8c03\u4f18\uff1a\u8fde\u63a5\u6c60\u7ba1\u7406\u4f18\u5316"},"content":{"rendered":"<p>\u5728 MySQL \u9ad8\u5e76\u53d1\u5e94\u7528\u4e2d&#xff0c;\u6570\u636e\u5e93\u8fde\u63a5\u7ba1\u7406 \u5bf9\u6027\u80fd\u5f71\u54cd\u5de8\u5927\u3002\u5982\u679c\u6bcf\u6b21\u67e5\u8be2\u90fd\u65b0\u5efa\u548c\u9500\u6bc1\u6570\u636e\u5e93\u8fde\u63a5&#xff0c;\u5c06\u5bfc\u81f4 \u8d44\u6e90\u6d88\u8017\u589e\u52a0\u3001\u54cd\u5e94\u65f6\u95f4\u53d8\u957f&#xff0c;\u8fdb\u800c\u5f71\u54cd\u7cfb\u7edf\u541e\u5410\u91cf\u3002\u56e0\u6b64&#xff0c;\u5408\u7406\u7684 \u8fde\u63a5\u6c60\u7ba1\u7406 \u53ef\u4ee5\u6709\u6548\u63d0\u5347 MySQL \u7684\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002\u672c\u7bc7\u6587\u7ae0\u5c06\u4ecb\u7ecd&#xff1a; \u2705 MySQL \u8fde\u63a5\u7ba1\u7406\u7684\u5de5\u4f5c\u539f\u7406 \u2705 \u8fde\u63a5\u6c60\u5173\u952e\u53c2\u6570\u8c03\u4f18&#xff08;max_connections\u3001wait_timeout\u3001thread_cache_size&#xff09; \u2705 \u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u7684\u8fde\u63a5\u6c60\u4f18\u5316\u65b9\u6848&#xff08;\u5982 HikariCP\u3001Druid&#xff09;<\/p>\n<hr \/>\n<h2>1. MySQL \u8fde\u63a5\u7ba1\u7406\u5de5\u4f5c\u539f\u7406<\/h2>\n<h3>1.1 MySQL \u7684\u8fde\u63a5\u673a\u5236<\/h3>\n<p>\u6bcf\u5f53\u5ba2\u6237\u7aef\u8fde\u63a5 MySQL \u670d\u52a1\u5668\u65f6&#xff0c;MySQL \u4f1a\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4&#xff1a;<\/p>\n<li>TCP \u8fde\u63a5\u5efa\u7acb&#xff08;\u4f7f\u7528 3306 \u7aef\u53e3&#xff09;\u3002<\/li>\n<li>\u8eab\u4efd\u9a8c\u8bc1&#xff08;\u9a8c\u8bc1\u7528\u6237\u540d\u3001\u5bc6\u7801\u3001\u6743\u9650&#xff09;\u3002<\/li>\n<li>\u521b\u5efa\u7ebf\u7a0b \u5904\u7406 SQL \u8bed\u53e5\u3002<\/li>\n<li>SQL \u6267\u884c\u5e76\u8fd4\u56de\u7ed3\u679c\u3002<\/li>\n<li>\u8fde\u63a5\u5173\u95ed&#xff0c;\u91ca\u653e\u7ebf\u7a0b\u8d44\u6e90\u3002<\/li>\n<p>&#x1f4cc; \u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>\u5982\u679c\u6bcf\u6b21\u67e5\u8be2\u90fd\u521b\u5efa\u65b0\u8fde\u63a5&#xff0c;\u5c06\u5bfc\u81f4 CPU\u3001\u5185\u5b58\u5f00\u9500\u589e\u52a0&#xff0c;\u5f71\u54cd\u541e\u5410\u91cf\u3002<\/li>\n<li>\u9ad8\u5e76\u53d1\u65f6&#xff0c;\u5927\u91cf\u7ebf\u7a0b\u521b\u5efa\/\u9500\u6bc1 \u4f1a\u5bfc\u81f4 \u7ebf\u7a0b\u5207\u6362\u5f00\u9500\u8fc7\u9ad8\u3002<\/li>\n<\/ul>\n<h3>1.2 \u8fde\u63a5\u6c60\u7684\u4f5c\u7528<\/h3>\n<p>\u6570\u636e\u5e93 \u8fde\u63a5\u6c60&#xff08;Connection Pool&#xff09; \u901a\u8fc7 \u590d\u7528\u6570\u636e\u5e93\u8fde\u63a5&#xff0c;\u51cf\u5c11\u8fde\u63a5\u5efa\u7acb\u548c\u9500\u6bc1\u7684\u5f00\u9500&#xff0c;\u4ece\u800c\u63d0\u5347\u6027\u80fd\u3002\u8fde\u63a5\u6c60\u7684\u4f18\u52bf&#xff1a; \u2705 \u51cf\u5c11\u8fde\u63a5\u521b\u5efa\u7684\u5f00\u9500&#xff08;\u907f\u514d\u9891\u7e41\u5efa\u7acb TCP \u8fde\u63a5&#xff09;\u3002<\/p>\n<p>\u2705 \u63d0\u9ad8\u5e76\u53d1\u6027\u80fd&#xff08;\u591a\u4e2a\u7ebf\u7a0b\u590d\u7528\u8fde\u63a5&#xff0c;\u51cf\u5c11\u7ebf\u7a0b\u5207\u6362&#xff09;\u3002<\/p>\n<p>\u2705 \u63a7\u5236\u6570\u636e\u5e93\u8d1f\u8f7d&#xff08;\u907f\u514d\u8d85\u8fc7 MySQL max_connections&#xff09;\u3002<\/p>\n<hr \/>\n<h2>2. MySQL \u8fde\u63a5\u7ba1\u7406\u53c2\u6570\u8c03\u4f18<\/h2>\n<h3>2.1 \u8bbe\u7f6e\u6700\u5927\u8fde\u63a5\u6570&#xff08;max_connections&#xff09;<\/h3>\n<h4>\u67e5\u770b\u5f53\u524d\u6700\u5927\u8fde\u63a5\u6570<\/h4>\n<p><span class=\"token keyword\">SHOW<\/span> VARIABLES <span class=\"token operator\">LIKE<\/span> <span class=\"token string\">&#039;max_connections&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u793a\u4f8b\u8f93\u51fa&#xff1a;<\/p>\n<p>&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;&#043;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> Variable_name   <span class=\"token operator\">|<\/span> Value <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;&#043;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> max_connections <span class=\"token operator\">|<\/span> <span class=\"token number\">151<\/span>   <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;&#043;&#8212;&#8212;-&#043;<\/p>\n<p>&#x1f4cc; \u9ed8\u8ba4\u503c 151&#xff0c;\u610f\u5473\u7740 MySQL \u6700\u591a\u5141\u8bb8 151 \u4e2a\u5e76\u53d1\u8fde\u63a5\u3002<\/p>\n<h4>\u8c03\u6574 max_connections<\/h4>\n<p><span class=\"token keyword\">SET<\/span> <span class=\"token keyword\">GLOBAL<\/span> max_connections <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">500<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#x1f4cc; \u6301\u4e45\u5316\u914d\u7f6e&#xff08;my.cnf&#xff09;&#xff1a;<\/p>\n<p><span class=\"token punctuation\">[<\/span>mysqld<span class=\"token punctuation\">]<\/span><br \/>\nmax_connections <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">500<\/span><\/p>\n<p>\u63a8\u8350\u503c&#xff1a;<\/p>\n<table>\n<tr>\u670d\u52a1\u5668\u5185\u5b58max_connections<\/tr>\n<tbody>\n<tr>\n<td>4GB<\/td>\n<td>200 &#8211; 400<\/td>\n<\/tr>\n<tr>\n<td>8GB<\/td>\n<td>400 &#8211; 800<\/td>\n<\/tr>\n<tr>\n<td>16GB<\/td>\n<td>800 &#8211; 1500<\/td>\n<\/tr>\n<tr>\n<td>32GB<\/td>\n<td>1500 &#8211; 3000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&#x1f4cc; \u4f18\u5316\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>\u8fc7\u9ad8\u7684 max_connections \u53ef\u80fd\u5bfc\u81f4\u5185\u5b58\u5360\u7528\u8fc7\u5927&#xff0c;\u5efa\u8bae\u914d\u5408 thread_cache_size \u8c03\u4f18\u3002<\/li>\n<li>\u5408\u7406\u8bbe\u7f6e\u8fde\u63a5\u6c60\u5927\u5c0f&#xff0c;\u907f\u514d\u6570\u636e\u5e93\u538b\u529b\u8fc7\u5927\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>2.2 \u8fde\u63a5\u8d85\u65f6\u7ba1\u7406&#xff08;wait_timeout &amp; interactive_timeout&#xff09;<\/h3>\n<h4>\u67e5\u770b\u5f53\u524d\u8fde\u63a5\u8d85\u65f6\u65f6\u95f4<\/h4>\n<p><span class=\"token keyword\">SHOW<\/span> VARIABLES <span class=\"token operator\">LIKE<\/span> <span class=\"token string\">&#039;wait_timeout&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">SHOW<\/span> VARIABLES <span class=\"token operator\">LIKE<\/span> <span class=\"token string\">&#039;interactive_timeout&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u793a\u4f8b\u8f93\u51fa&#xff1a;<\/p>\n<p>&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> Variable_name     <span class=\"token operator\">|<\/span> Value <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> wait_timeout      <span class=\"token operator\">|<\/span> <span class=\"token number\">28800<\/span> <span class=\"token operator\">|<\/span><br \/>\n<span class=\"token operator\">|<\/span> interactive_timeout <span class=\"token operator\">|<\/span> <span class=\"token number\">28800<\/span> <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;-&#043;<\/p>\n<p>&#x1f4cc; \u9ed8\u8ba4\u503c 28800 \u79d2&#xff08;8 \u5c0f\u65f6&#xff09;&#xff0c;\u610f\u5473\u7740 \u7a7a\u95f2\u8fde\u63a5 8 \u5c0f\u65f6\u4e0d\u64cd\u4f5c\u624d\u4f1a\u88ab\u65ad\u5f00\u3002<\/p>\n<h4>\u8c03\u6574 wait_timeout&#xff0c;\u907f\u514d\u7a7a\u95f2\u8fde\u63a5\u5360\u7528\u8d44\u6e90<\/h4>\n<p><span class=\"token keyword\">SET<\/span> <span class=\"token keyword\">GLOBAL<\/span> wait_timeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">600<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">SET<\/span> <span class=\"token keyword\">GLOBAL<\/span> interactive_timeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">600<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#x1f4cc; \u6301\u4e45\u5316\u914d\u7f6e&#xff08;my.cnf&#xff09;&#xff1a;<\/p>\n<p><span class=\"token punctuation\">[<\/span>mysqld<span class=\"token punctuation\">]<\/span><br \/>\nwait_timeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">600<\/span><br \/>\ninteractive_timeout <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">600<\/span><\/p>\n<p>&#x1f4cc; \u4f18\u5316\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>\u751f\u4ea7\u73af\u5883\u5efa\u8bae\u7f29\u77ed wait_timeout&#xff08;\u5982 600 \u79d2&#xff0c;\u907f\u514d\u957f\u671f\u7a7a\u95f2\u8fde\u63a5\u5360\u7528\u8d44\u6e90&#xff09;\u3002<\/li>\n<li>\u957f\u8fde\u63a5\u5e94\u7528\u53ef\u9002\u5f53\u8c03\u5927 wait_timeout&#xff0c;\u51cf\u5c11\u8fde\u63a5\u91cd\u5efa\u5f00\u9500\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>2.3 \u7ebf\u7a0b\u7f13\u5b58&#xff08;thread_cache_size&#xff09;<\/h3>\n<h4>\u67e5\u770b\u5f53\u524d\u7ebf\u7a0b\u7f13\u5b58<\/h4>\n<p><span class=\"token keyword\">SHOW<\/span> VARIABLES <span class=\"token operator\">LIKE<\/span> <span class=\"token string\">&#039;thread_cache_size&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u793a\u4f8b\u8f93\u51fa&#xff1a;<\/p>\n<p>&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> Variable_name     <span class=\"token operator\">|<\/span> Value <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;-&#043;<br \/>\n<span class=\"token operator\">|<\/span> thread_cache_size <span class=\"token operator\">|<\/span> <span class=\"token number\">8<\/span>     <span class=\"token operator\">|<\/span><br \/>\n&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;-&#043;<\/p>\n<p>&#x1f4cc; thread_cache_size \u4f5c\u7528&#xff1a;<\/p>\n<ul>\n<li>\u7f13\u5b58\u7ebf\u7a0b&#xff0c;\u907f\u514d\u6bcf\u6b21\u65b0\u8fde\u63a5\u90fd\u521b\u5efa\u7ebf\u7a0b&#xff0c;\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li>\u5982\u679c Threads_created \u5f88\u9ad8&#xff0c;\u8bf4\u660e MySQL \u9891\u7e41\u521b\u5efa\u65b0\u7ebf\u7a0b&#xff0c;\u9700\u8981\u589e\u5927 thread_cache_size\u3002<\/li>\n<\/ul>\n<h4>\u8c03\u6574 thread_cache_size<\/h4>\n<p><span class=\"token keyword\">SET<\/span> <span class=\"token keyword\">GLOBAL<\/span> thread_cache_size <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">50<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#x1f4cc; \u6301\u4e45\u5316\u914d\u7f6e&#xff08;my.cnf&#xff09;&#xff1a;<\/p>\n<p><span class=\"token punctuation\">[<\/span>mysqld<span class=\"token punctuation\">]<\/span><br \/>\nthread_cache_size <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">50<\/span><\/p>\n<p>&#x1f4cc; \u4f18\u5316\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>thread_cache_size \u8bbe\u4e3a max_connections \u7684 10% \u5de6\u53f3&#xff0c;\u63d0\u9ad8\u8fde\u63a5\u590d\u7528\u7387\u3002<\/li>\n<li>\u51cf\u5c11 Threads_created \u9891\u7387&#xff0c;\u63d0\u9ad8\u5e76\u53d1\u67e5\u8be2\u80fd\u529b\u3002<\/li>\n<\/ul>\n<hr \/>\n<h2>3. \u8fde\u63a5\u6c60\u4f18\u5316\u65b9\u6848&#xff08;\u5e94\u7528\u5c42&#xff09;<\/h2>\n<p>MySQL \u81ea\u5e26\u7684\u8fde\u63a5\u7ba1\u7406\u65b9\u5f0f\u8f83\u4e3a\u7b80\u5355&#xff0c;\u751f\u4ea7\u73af\u5883\u4e2d\u901a\u5e38\u4f7f\u7528 \u6570\u636e\u5e93\u8fde\u63a5\u6c60&#xff08;\u5982 HikariCP\u3001Druid&#xff09;\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h3>3.1 \u4f7f\u7528 HikariCP&#xff08;Java \u8fde\u63a5\u6c60&#xff09;<\/h3>\n<p>HikariCP \u662f \u9ad8\u6027\u80fd\u6570\u636e\u5e93\u8fde\u63a5\u6c60&#xff0c;\u76f8\u6bd4\u4f20\u7edf C3P0 \u6216 DBCP&#xff0c;\u5b83\u66f4\u5feb\u3001\u66f4\u7a33\u5b9a\u3002<\/p>\n<h4>\u914d\u7f6e HikariCP<\/h4>\n<p>spring.datasource.hikari.maximum-pool-size<span class=\"token operator\">&#061;<\/span><span class=\"token number\">50<\/span>  <span class=\"token comment\"># \u8fde\u63a5\u6c60\u6700\u5927\u8fde\u63a5\u6570<\/span><br \/>\nspring.datasource.hikari.minimum-idle<span class=\"token operator\">&#061;<\/span><span class=\"token number\">10<\/span>  <span class=\"token comment\"># \u6700\u5c0f\u7a7a\u95f2\u8fde\u63a5\u6570<\/span><br \/>\nspring.datasource.hikari.idle-timeout<span class=\"token operator\">&#061;<\/span><span class=\"token number\">600000<\/span>  <span class=\"token comment\"># \u7a7a\u95f2\u8fde\u63a5\u8d85\u65f6&#xff08;10\u5206\u949f&#xff09;<\/span><br \/>\nspring.datasource.hikari.connection-timeout<span class=\"token operator\">&#061;<\/span><span class=\"token number\">30000<\/span>  <span class=\"token comment\"># \u8fde\u63a5\u8d85\u65f6&#xff08;30\u79d2&#xff09;<\/span><\/p>\n<p>&#x1f4cc; \u4f18\u5316\u70b9&#xff1a;<\/p>\n<ul>\n<li>maximum-pool-size \u8bbe\u7f6e\u5408\u7406&#xff0c;\u907f\u514d\u5360\u7528\u8fc7\u591a\u6570\u636e\u5e93\u8fde\u63a5\u3002<\/li>\n<li>idle-timeout \u8bbe\u7f6e\u8f83\u77ed&#xff0c;\u907f\u514d\u7a7a\u95f2\u8fde\u63a5\u6d6a\u8d39\u8d44\u6e90\u3002<\/li>\n<li>connection-timeout \u4e0d\u5b9c\u8fc7\u957f&#xff0c;\u9632\u6b62\u8fde\u63a5\u963b\u585e\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>3.2 \u4f7f\u7528 Druid&#xff08;\u963f\u91cc\u5df4\u5df4\u5f00\u6e90\u8fde\u63a5\u6c60&#xff09;<\/h3>\n<p>Druid \u662f \u963f\u91cc\u5df4\u5df4\u5f00\u6e90\u7684\u6570\u636e\u5e93\u8fde\u63a5\u6c60&#xff0c;\u652f\u6301 SQL \u76d1\u63a7\u3002<\/p>\n<h4>Druid \u914d\u7f6e<\/h4>\n<p>spring.datasource.druid.max-active<span class=\"token operator\">&#061;<\/span><span class=\"token number\">50<\/span>  <span class=\"token comment\"># \u6700\u5927\u8fde\u63a5\u6570<\/span><br \/>\nspring.datasource.druid.min-idle<span class=\"token operator\">&#061;<\/span><span class=\"token number\">10<\/span>  <span class=\"token comment\"># \u6700\u5c0f\u7a7a\u95f2\u8fde\u63a5\u6570<\/span><br \/>\nspring.datasource.druid.max-wait<span class=\"token operator\">&#061;<\/span><span class=\"token number\">5000<\/span>  <span class=\"token comment\"># \u8fde\u63a5\u7b49\u5f85\u65f6\u95f4<\/span><br \/>\nspring.datasource.druid.time-between-eviction-runs-millis<span class=\"token operator\">&#061;<\/span><span class=\"token number\">60000<\/span>  <span class=\"token comment\"># \u6e05\u7406\u7a7a\u95f2\u8fde\u63a5\u95f4\u9694<\/span><\/p>\n<p>&#x1f4cc; Druid \u9002\u7528\u4e8e&#xff1a;<\/p>\n<ul>\n<li>\u652f\u6301 SQL \u76d1\u63a7&#xff0c;\u53ef\u5206\u6790\u6162\u67e5\u8be2\u3002<\/li>\n<li>\u66f4\u7075\u6d3b\u7684\u8fde\u63a5\u7ba1\u7406&#xff0c;\u9002\u7528\u4e8e\u9ad8\u5e76\u53d1\u7cfb\u7edf\u3002<\/li>\n<\/ul>\n<hr \/>\n<h2>4. \u7ed3\u8bba<\/h2>\n<p>\u2705 \u5408\u7406\u8bbe\u7f6e max_connections&#xff0c;\u907f\u514d MySQL \u8d1f\u8f7d\u8fc7\u9ad8\u3002<\/p>\n<p>\u2705 \u8c03\u6574 wait_timeout&#xff0c;\u51cf\u5c11\u7a7a\u95f2\u8fde\u63a5\u5360\u7528\u8d44\u6e90\u3002<\/p>\n<p>\u2705 \u4f7f\u7528 thread_cache_size 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