{"id":295,"date":"2026-02-24T20:06:06","date_gmt":"2026-02-24T12:06:06","guid":{"rendered":"https:\/\/cloverdayssss.top\/?p=295"},"modified":"2026-04-12T16:48:04","modified_gmt":"2026-04-12T08:48:04","slug":"%e8%a7%a3%e5%86%b3%e5%ad%90%e7%ab%99%e7%bd%91%e7%9b%98%e4%b8%8b%e8%bd%bd%e6%97%b6%e4%b8%bb%e7%ab%99%e5%8d%a1%e6%ad%bb%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/cloverdayssss.top\/index.php\/2026\/02\/24\/%e8%a7%a3%e5%86%b3%e5%ad%90%e7%ab%99%e7%bd%91%e7%9b%98%e4%b8%8b%e8%bd%bd%e6%97%b6%e4%b8%bb%e7%ab%99%e5%8d%a1%e6%ad%bb%e7%9a%84%e9%97%ae%e9%a2%98\/","title":{"rendered":"\u89e3\u51b3\u5b50\u7ad9\u7f51\u76d8\u4e0b\u8f7d\u65f6\u4e3b\u7ad9\u5361\u6b7b\u7684\u95ee\u9898"},"content":{"rendered":"<blockquote><p>\n  \u7701\u6d41\uff1a\u51cf\u5c11\u4e86mysql\u7684\u6700\u5927\u5e76\u53d1\u91cf\uff0c\u51cf\u8f7b\u4e86\u8fd9\u90e8\u5206\u5bfc\u81f4\u7684\u670d\u52a1\u5668\u8d1f\u62c5\uff0c\u6839\u672c\u95ee\u9898\u8c8c\u4f3c\u5e76\u6ca1\u6709\u89e3\u51b3\uff08\uff08\uff08\u3002\u81f3\u5c11\u73b0\u5728\u4e0d\u5361\u4e86\u3002\n<\/p><\/blockquote>\n<p>\u200b          \u6d4b\u8bd5\u7f51\u76d8\u7684\u65f6\u5019\u51fa\u73b0\u4e86\u4e00\u70b9\u6bd4\u8f83\u5947\u602a\u7684\u95ee\u9898\uff08\uff0c\u4ece\u7f51\u76d8\u4e0b\u8f7d\u6587\u4ef6\u65f6\u670d\u52a1\u5668\u8d1f\u8f7d\u4e00\u5ea6\u4f1a\u98d9\u5347\u5230100%\u5361\u7684\u6211\u5565\u4e5f\u6253\u4e0d\u5f00\uff0c\u8fde\u9762\u677f\u90fd\u52a8\u4e0d\u4e86\u3002\u4f46\u662f\u76f4\u63a5\u4ece\u670d\u52a1\u5668\u4e0a\u4e0b\u8f7d\u7f51\u7ad9\u5907\u4efd\u6587\u4ef6\u65f6\u5374\u53c8\u51e0\u4e4e\u4e0d\u63d0\u5347\u8d1f\u8f7d\u3002<\/p>\n<p>\u200b         \u770b\u770b\u4e3a\u4ec0\u4e48\u4e0b\u4e2a\u4e1c\u897f\u8d1f\u8f7d\u4f1a\u8fd9\u4e48\u5927\u3002\u7528\u963f\u91cc\u4e91\u8fdc\u7a0b\u8fde\u63a5\u4e00\u4e0b\u670d\u52a1\u5668\uff0c\u770b\u4e00\u4e0b\u57fa\u672c\u60c5\u51b5\uff1a<\/p>\n<ul>\n<li><code>top<\/code> \u547d\u4ee4\u663e\u793a\u8d1f\u8f7d\u5e73\u5747\u503c\uff08load average\uff09\u6301\u7eed\u8d85\u8fc7 10\uff0c\u800c CPU \u7a7a\u95f2\u7387\u9ad8\u8fbe 99%\uff1b<\/li>\n<li><code>vmstat<\/code> \u8f93\u51fa\u4e2d <code>wa<\/code>\uff08I\/O \u7b49\u5f85\uff09\u4e00\u5ea6\u8d85\u8fc7 50%\uff0c<code>b<\/code> \u5217\u51fa\u73b0\u5927\u91cf\u4e0d\u53ef\u4e2d\u65ad\u7761\u7720\u8fdb\u7a0b\uff1b<\/li>\n<li><code>free -h<\/code> \u663e\u793a\u7269\u7406\u5185\u5b58\u5c1a\u6709 1.5GB \u7a7a\u95f2\uff0c\u4f46 swap \u4f7f\u7528\u91cf\u5374\u9ad8\u8fbe 500MB \u4ee5\u4e0a\uff1b<\/li>\n<li>\u7f51\u7ad9\u540e\u53f0\u64cd\u4f5c\u65f6\u9891\u7e41\u51fa\u73b0 502\/504 \u9519\u8bef\uff0c\u7f51\u76d8\u6587\u4ef6\u4f20\u8f93\u65f6\u54cd\u5e94\u53d8\u6162\u3002<\/li>\n<\/ul>\n<p>\u200b       \u770b\u6765\u8d1f\u8f7d\u9ad8\u65f6 CPU \u5927\u90e8\u5206\u65f6\u95f4\u7a7a\u95f2\uff0c\u4f46 I\/O \u7b49\u5f85\u663e\u8457\uff0c\u4e14\u5b58\u5728\u5927\u91cf D \u72b6\u6001\uff08\u4e0d\u53ef\u4e2d\u65ad\u7761\u7720\uff09\u8fdb\u7a0b\uff0c\u8fd9\u901a\u5e38\u610f\u5473\u7740\u8fdb\u7a0b\u5728\u7b49\u5f85\u78c1\u76d8 I\/O \u5b8c\u6210\u3002\u540c\u65f6\uff0cswap \u7684\u6301\u7eed\u8bfb\u5199\uff08<code>si<\/code>\/<code>so<\/code> \u5217\uff09\u8fdb\u4e00\u6b65\u5370\u8bc1\u4e86\u5185\u5b58\u4e0e\u78c1\u76d8\u4e4b\u95f4\u7684\u4ea4\u6362\u6d3b\u52a8\u9891\u7e41\u3002<\/p>\n<p>\u200b        \u4e0d\u5bf9\uff01\u5185\u5b58\u8fd8\u52691.5G\u7684\u7a7a\u95f2\uff0c\u6ca1\u4e8b\u8c03\u7528\u78c1\u76d8\u5e72\u561b\uff0c\u6ca1\u6709\u8fd9\u4e2a\u5fc5\u8981\u3002\u4f7f\u7528 <code>ps aux | awk '$8==\"D\" {print}'<\/code> \u67e5\u770b D \u72b6\u6001\u8fdb\u7a0b\uff0c\u53d1\u73b0\u4e3b\u8981\u4e3a php-fpm \u548c mysqld\u3002\u8fdb\u4e00\u6b65\u901a\u8fc7 <code>\/proc\/*\/status<\/code> \u68c0\u67e5\u5404\u8fdb\u7a0b\u7684 swap \u5360\u7528\uff0c\u53d1\u73b0 <strong>mysqld \u5360\u7528\u4e86\u7ea6 270MB swap<\/strong>\uff0c\u5b9d\u5854\u9762\u677f\u548c\u5b9d\u5854\u5b9a\u65f6\u4efb\u52a1 \u7b49\u4e5f\u5360\u7528\u4e86\u4e00\u5b9a\u91cf\u7684 swap\u3002\u8fd9\u8bf4\u660e\u867d\u7136\u7269\u7406\u5185\u5b58\u5c1a\u6709\u5bcc\u4f59\uff0c\u4f46\u90e8\u5206\u8fdb\u7a0b\u7684\u5185\u5b58\u9875\u88ab\u4ea4\u6362\u5230\u4e86\u78c1\u76d8\uff0c\u5bfc\u81f4\u8bbf\u95ee\u8fd9\u4e9b\u5185\u5b58\u65f6\u89e6\u53d1\u78c1\u76d8 I\/O\u3002<\/p>\n<p>\u200b        \u67e5\u770b\u76f8\u5173\u914d\u7f6e\uff0c\u53d1\u73b0MySQL \u914d\u7f6e\u4e2d <code>innodb_buffer_pool_size<\/code> \u4ec5\u4e3a 128MB\uff0c\u8fd9\u8bf4\u660e\u5e76\u4e0d\u662fmysql\u4e3b\u52a8\u5360\u7528\u5bfc\u81f4swap\u3002\u7136\u800c<code>swappiness<\/code> \u503c\u4e3a\u9ed8\u8ba4\u7684 60\uff0c\u5bfc\u81f4\u5185\u6838\u503e\u5411\u4e8e\u5c06\u4e0d\u5e38\u8bbf\u95ee\u7684\u5185\u5b58\u9875 swap out \u4ee5\u817e\u51fa\u7a7a\u95f4\u7ed9\u6587\u4ef6\u7f13\u5b58\uff0c\u5373\u4f7f\u7269\u7406\u5185\u5b58\u8fd8\u6709\u7a7a\u95f2\u3002\u5c06\u8be5\u503c\u8bbe\u7f6e\u4e3a10\uff0c\u518d\u6b21\u8fdb\u884c\u8d1f\u8f7d\u6d4b\u8bd5\uff0c\u6548\u679c\u4e0d\u660e\u663e\uff0c\u4ecd\u7136\u8fbe\u523095%\u4ee5\u4e0a\u3002<\/p>\n<p>\u200b        \u4e3a\u4e86\u5f3a\u5236\u5220\u9664swap\u4e2d\u6b8b\u7559\u7684\u6570\u636e\uff0c\u6267\u884c <code>sudo swapoff -a &amp;&amp; sudo swapon -a<\/code>\u5c06\u670d\u52a1\u91cd\u542f\u3002\u4e4b\u540e\u67e5\u770b\u72b6\u6001\uff0c\u5728\u521a\u521a\u91cd\u542f\u65f6\u786e\u5b9e\u5f52\u96f6\u4e86\uff0c\u4f46\u5728\u4e00\u5206\u949f\u540eswap\u5360\u7528\u91cd\u65b0\u6765\u5230500MB\u3002\u6574\u4e2a\u8fc7\u7a0b\u4e2d\u5185\u5b58\u5360\u7528\u4fdd\u6301\u572815%\u4ee5\u4e0b\uff0c\u7edd\u5bf9\u5145\u8db3\u3002<\/p>\n<p>\u200b        \u8fd9\u5c31\u5947\u602a\u4e86\uff0cswap \u4e3a\u4ec0\u4e48\u4f1a\u8fc5\u901f\u91cd\u65b0\u586b\u6ee1\uff1f\u8bf4\u660e\u7cfb\u7edf\u786e\u5b9e\u5728\u4e3b\u52a8\u5c06\u5185\u5b58\u9875\u6362\u51fa\uff0c\u800c\u4e0d\u662f\u5386\u53f2\u6b8b\u7559\u3002\u518d\u6b21\u68c0\u67e5\u8fdb\u7a0b swap \u5360\u7528\uff0c\u53d1\u73b0 <strong>mysqld \u4ecd\u7136\u662f\u5934\u53f7\u5927\u6237<\/strong>\uff0c\u5360\u636e\u4e86 270MB \u5de6\u53f3\u3002\u770b\u6765\u95ee\u9898\u53c8\u56de\u5230 MySQL \u8eab\u4e0a\u3002\u65e2\u7136 <code>innodb_buffer_pool_size<\/code> \u53ea\u6709 128MB\uff0c\u90a3 MySQL \u8fd8\u80fd\u4ece\u54ea\u91cc\u5403\u6389\u8fd9\u4e48\u591a\u5185\u5b58\uff1f\u770b\u770b\u5176\u4ed6\u53c2\u6570\u3002<\/p>\n<pre><code class=\"language-sql line-numbers\">SHOW VARIABLES LIKE 'max_connections';\nSHOW VARIABLES LIKE 'sort_buffer_size';\nSHOW VARIABLES LIKE 'join_buffer_size';\nSHOW VARIABLES LIKE 'tmp_table_size';\n<\/code><\/pre>\n<ul>\n<li><code>max_connections = 500<\/code><strong>\uff08\uff1f\uff09<\/strong><\/li>\n<li><code>sort_buffer_size = 786432<\/code><\/li>\n<li><code>join_buffer_size = 262144<\/code><\/li>\n<li><code>tmp_table_size = 33554432<\/code><\/li>\n<\/ul>\n<h5>\u95ee\u9898\u51fa\u73b0\u4e86\u3002\u6bcf\u4e2a\u8fde\u63a5\u867d\u7136\u5b9e\u9645\u4f7f\u7528\u7684\u4e0d\u591a\uff0c\u4f46 MySQL \u4f1a\u4e3a <strong>\u6700\u591a 500 \u4e2a\u5e76\u53d1\u8fde\u63a5<\/strong> \u9884\u7559\u7f13\u51b2\u533a\u3002\u7c97\u7565\u4f30\u7b97\uff0c\u4ec5 per-thread \u5185\u5b58\u5c31\u53ef\u80fd\u8fbe\u5230 500 * (768K+256K) \u2248 500MB\uff0c\u518d\u52a0\u4e0a <code>innodb_buffer_pool<\/code>\u3001\u4e34\u65f6\u8868\u7b49\uff0c\u603b\u5185\u5b58\u8f7b\u677e\u8d85\u8fc7 1.8GB\u3002\u867d\u7136\u5b9e\u9645\u6d3b\u8dc3\u8fde\u63a5\u5f88\u5c11\uff08<code>Max_used_connections<\/code> \u53ea\u6709 19\uff09\uff0c\u4f46 MySQL \u7684\u5185\u5b58\u5206\u914d\u673a\u5236\u4ecd\u7136\u4f1a\u5bfc\u81f4\u5185\u5b58\u538b\u529b\uff0c\u5185\u6838\u4e0d\u5f97\u4e0d\u628a\u90e8\u5206\u9875\u9762\u6362\u51fa\u5230 swap\u3002\u800c\u8fd9\u53f0 1.8GB \u5185\u5b58\u7684\u5c0f\u670d\u52a1\u5668\u6839\u672c\u625b\u4e0d\u4f4f 500 \u4e2a\u8fde\u63a5\u7684\u5185\u5b58\u9884\u7559\u3002\u96be\u602a swap \u603b\u662f\u586b\u6ee1\u3002<\/h5>\n<p>\u6539\u6587\u4ef6\uff1a<\/p>\n<p><code>sudo vim \/etc\/my.cnf<\/code>\uff0c\u5c06 <code>max_connections<\/code> \u4ece 500 \u6539\u4e3a 100\uff0c\u540c\u65f6\u9002\u5f53\u8c03\u5c0f per-thread \u7f13\u51b2\u533a\uff1a<\/p>\n<pre><code class=\"language-ini line-numbers\">max_connections = 100\nsort_buffer_size = 256K\njoin_buffer_size = 128K\nread_buffer_size = 128K\nread_rnd_buffer_size = 256K\n<\/code><\/pre>\n<p>\u91cd\u542f MySQL\uff1a<\/p>\n<pre><code class=\"language-bash line-numbers\">sudo systemctl restart mysqld\n<\/code><\/pre>\n<p>\u200b        \u91cd\u542f\u540e\u518d\u6b21\u89c2\u5bdf \u4f7f\u7528<code>free -h<\/code>\u67e5\u770bswap \u5360\u7528\uff0cmysqld \u7684 swap \u4ece <strong>270MB \u9010\u6e10\u964d\u5230 128MB<\/strong>\uff0c\u5176\u4ed6\u8fdb\u7a0b\u7684 swap \u4e5f\u9646\u7eed\u51cf\u5c11\u3002\u518d\u6267\u884c\u4e00\u6b21 <code>sudo swapoff -a &amp;&amp; sudo swapon -a<\/code> \u5f7b\u5e95\u6e05\u7a7a\uff0c\u8fd9\u6b21 swap \u518d\u4e5f\u6ca1\u6709\u53cd\u5f39\u2014\u2014<strong>\u4e00\u76f4\u7a33\u7a33\u5730\u505c\u5728 0<\/strong>\u3002\u8d1f\u8f7d\u4e5f\u5f7b\u5e95\u6062\u590d\u6b63\u5e38.<\/p>\n<p>\u200b        \u91cd\u65b0\u5c1d\u8bd5\u7528\u5916\u94fe\u4e0b\u8f7d\u7f51\u76d8\u6587\u4ef6\uff0cswap\u5f00\u59cb\u4e0a\u5347\uff0cCPU\u5360\u7528\u4e00\u5ea6\u8fbe\u523080%\uff0c\u4f46\u6574\u4e2a\u8fc7\u7a0b\u4e2d\u8d1f\u8f7d\u6700\u9ad8\u4e5f\u624d60%\u3002\u6682\u505c\u4e0b\u8f7d\u540e\uff0c\u8d1f\u8f7d\u6162\u6162\u56de\u523011\uff0cswap\u56de\u5230110Mb\u540e\u57fa\u672c\u4e0d\u52a8\uff0c\u5c5e\u4e8eLinux \u5185\u5b58\u7ba1\u7406\u5728\u538b\u529b\u4e0b\u7684\u5178\u578b\u8868\u73b0\u3002<\/p>\n<p>\u200b         \u5230\u6b64\u7b97\u662f\uff08\uff1f\uff09\u89e3\u51b3\u4e86\u95ee\u9898\uff0c\u9488\u4e0d\u6233\u554a\u9488\u4e0d\u6233\ud83e\udd70\ud83e\udd70\ud83e\udd70<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7701\u6d41\uff1a\u51cf\u5c11\u4e86mysql\u7684\u6700\u5927\u5e76\u53d1\u91cf\uff0c\u51cf\u8f7b\u4e86\u8fd9\u90e8\u5206\u5bfc\u81f4\u7684\u670d\u52a1\u5668\u8d1f\u62c5\uff0c\u6839\u672c\u95ee\u9898\u8c8c\u4f3c\u5e76\u6ca1\u6709\u89e3\u51b3\uff08\uff08\uff08\u3002\u81f3\u5c11\u73b0\u5728\u4e0d\u5361\u4e86\u3002 \u200b \u6d4b\u8bd5\u7f51\u76d8\u7684\u65f6 &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[13,8],"class_list":["post-295","post","type-post","status-publish","format-standard","hentry","category-7","tag-13","tag-8"],"_links":{"self":[{"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/posts\/295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/comments?post=295"}],"version-history":[{"count":3,"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/posts\/295\/revisions"}],"predecessor-version":[{"id":299,"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/posts\/295\/revisions\/299"}],"wp:attachment":[{"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/media?parent=295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/categories?post=295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cloverdayssss.top\/index.php\/wp-json\/wp\/v2\/tags?post=295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}