{"id":5350,"date":"2026-02-07T12:09:22","date_gmt":"2026-02-07T03:09:22","guid":{"rendered":"https:\/\/eternalsphere.net\/echoes\/?p=5350"},"modified":"2026-06-06T05:39:22","modified_gmt":"2026-06-05T20:39:22","slug":"s5ilesheg4bi305","status":"publish","type":"post","link":"https:\/\/eternalsphere.net\/echoes\/index.php\/2026\/02\/07\/s5ilesheg4bi305\/","title":{"rendered":"\u4e00\u6b21\u670d\u52a1\u5668\u78c1\u76d8 I\/O \u74f6\u9888\u7684\u6392\u67e5\u8bb0\u5f55"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u95ee\u9898\u80cc\u666f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e00\u53f0\u957f\u671f\u7a33\u5b9a\u8fd0\u884c\u7684 Linux \u670d\u52a1\u5668\u4e0a\uff0c\u8fd1\u671f\u89c2\u5bdf\u5230\u4ee5\u4e0b\u73b0\u8c61\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7cfb\u7edf\u54cd\u5e94\u53d8\u6162\uff0c\u4f46\u672a\u51fa\u73b0\u5d29\u6e83\u6216 OOM<\/li>\n\n\n\n<li>CPU \u4f7f\u7528\u7387\u5e76\u4e0d\u9ad8\uff0c\u4f46 <code>iowait<\/code> \u660e\u663e\u5347\u9ad8<\/li>\n\n\n\n<li>\u5185\u5b58\u5145\u8db3\uff0c\u65e0 Swap<\/li>\n\n\n\n<li>\u505c\u6b62\u90e8\u5206\u9ad8 CPU \u8d1f\u8f7d\u670d\u52a1\u540e\uff0c\u95ee\u9898\u4ecd\u7136\u5b58\u5728<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u521d\u6b65\u5224\u65ad\uff1a<strong>\u74f6\u9888\u4e0d\u5728 CPU \u548c\u5185\u5b58\uff0c\u800c\u53ef\u80fd\u5728\u78c1\u76d8 I\/O<\/strong>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u7b2c\u4e00\u6b65\uff1a\u6574\u4f53\u8d1f\u8f7d\u5224\u65ad\uff08top\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7 <code>top<\/code> \u89c2\u5bdf\u7cfb\u7edf\u6574\u4f53\u72b6\u6001\uff0c\u53d1\u73b0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>%id<\/code>\uff08CPU idle\uff09\u4ecd\u7136\u8f83\u9ad8<\/li>\n\n\n\n<li><code>%wa<\/code>\uff08I\/O wait\uff09\u5728 20%\uff5e40% \u533a\u95f4\u6ce2\u52a8<\/li>\n\n\n\n<li>\u591a\u4e2a\u8fdb\u7a0b\u5904\u4e8e <code>D<\/code>\uff08\u4e0d\u53ef\u4e2d\u65ad I\/O\uff09\u72b6\u6001<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u7c7b\u7279\u5f81\u901a\u5e38\u610f\u5473\u7740\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">CPU \u6709\u7a7a\u95f2\uff0c\u4f46\u8fdb\u7a0b\u5728\u7b49\u5f85\u78c1\u76d8 I\/O \u5b8c\u6210\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\u9700\u8981\u8fdb\u5165\u78c1\u76d8\u5c42\u9762\u5206\u6790\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u7b2c\u4e8c\u6b65\uff1a\u78c1\u76d8\u5c42\u5206\u6790\uff08iostat\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>iostat -xz 1\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u70b9\u5173\u6ce8\u4ee5\u4e0b\u6307\u6807\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>%util<\/code><\/li>\n\n\n\n<li><code>await<\/code><\/li>\n\n\n\n<li><code>r\/s<\/code>\u3001<code>w\/s<\/code><\/li>\n\n\n\n<li><code>rkB\/s<\/code>\u3001<code>wkB\/s<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5173\u952e\u89c2\u6d4b\u7ed3\u679c<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>%util<\/code> \u957f\u65f6\u95f4\u7ef4\u6301\u5728 <strong>90%\uff5e99%<\/strong><\/li>\n\n\n\n<li><code>await<\/code>\uff08\u8bfb\/\u5199\u7b49\u5f85\uff09\u5728 <strong>10\u201340 ms<\/strong> \u533a\u95f4<\/li>\n\n\n\n<li>\u541e\u5410\u91cf\u4ec5\u4e3a <strong>\u51e0\u767e KB\/s \uff5e \u51e0 MB\/s<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8bf4\u660e\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u78c1\u76d8\u5e76\u975e\u88ab\u201c\u5927\u6d41\u91cf\u8bfb\u5199\u201d\u538b\u6ee1\uff0c\u800c\u662f\u88ab <strong>\u9ad8\u9891\u5c0f\u5757 I\/O\uff08IOPS\uff09<\/strong> \u6253\u6ee1\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u6570\u636e\u5e93 + \u5143\u6570\u636e\u5bc6\u96c6\u578b\u8d1f\u8f7d\u7684\u5178\u578b\u7279\u5f81\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u7b2c\u4e09\u6b65\uff1a\u8fdb\u7a0b\u7ea7\u5b9a\u4f4d\uff08iotop\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>iotop -oPa\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u5de5\u5177\u53ef\u4ee5\u5b9e\u65f6\u5c55\u793a <strong>\u54ea\u4e9b\u8fdb\u7a0b\u5728\u8fdb\u884c\u78c1\u76d8\u8bfb\u5199<\/strong>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u89c2\u5bdf\u5230\u7684\u4e3b\u8981 I\/O \u6765\u6e90<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5173\u7cfb\u578b\u6570\u636e\u5e93\u8fdb\u7a0b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u540c\u65f6\u5b58\u5728\u6301\u7eed\u8bfb\u4e0e\u5199<\/li>\n\n\n\n<li>\u5355\u6b21\u5199\u5165\u4e0d\u5927\uff0c\u4f46\u9891\u7387\u6781\u9ad8<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6587\u6863\u578b\u6570\u636e\u5e93\u8fdb\u7a0b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5199\u5165\u91cf\u8f83\u5c0f\uff0c\u4f46\u5199\u64cd\u4f5c\u5bf9\u78c1\u76d8\u5ef6\u8fdf\u654f\u611f<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5e94\u7528\u5c42\u8fdb\u7a0b\uff08Java \/ Node \u7b49\uff09<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5c11\u91cf\u3001\u6301\u7eed\u7684\u5c0f\u5199\u5165<\/li>\n\n\n\n<li>\u5355\u4e2a\u8fdb\u7a0b\u5f71\u54cd\u6709\u9650\uff0c\u4f46\u53e0\u52a0\u540e\u4f1a\u589e\u52a0\u961f\u5217\u538b\u529b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Web \u5c42\u8fdb\u7a0b\uff08PHP-FPM\uff09<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u81ea\u8eab I\/O \u5f88\u4f4e<\/li>\n\n\n\n<li>\u4e3b\u8981\u4f5c\u7528\u662f\u89e6\u53d1\u6570\u636e\u5e93\u64cd\u4f5c<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u7cfb\u7edf\u7ea7\u8fdb\u7a0b\uff08\u65e5\u5fd7\u3001\u5bb9\u5668\u8fd0\u884c\u65f6\u7b49\uff09\u5747\u5904\u4e8e\u6b63\u5e38\u566a\u97f3\u6c34\u5e73\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u8d1f\u8f7d\u6a21\u5f0f\u5206\u6790<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7efc\u5408 <code>top<\/code>\u3001<code>iostat<\/code>\u3001<code>iotop<\/code> \u7684\u7ed3\u679c\uff0c\u53ef\u4ee5\u5f97\u5230\u5b8c\u6574\u56e0\u679c\u94fe\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u5e94\u7528\u8bf7\u6c42\n   \u2193\n\u6570\u636e\u5e93\u67e5\u8be2 \/ \u4e8b\u52a1\n   \u2193\n\u9891\u7e41\u5c0f\u5757\u540c\u6b65\u5199\uff08redo \/ journal\uff09\n   \u2193\n\u6587\u4ef6\u7cfb\u7edf\u65e5\u5fd7\u5c42\n   \u2193\n\u7269\u7406\u78c1\u76d8 I\/O \u961f\u5217\u6253\u6ee1\n   \u2193\nCPU iowait \u4e0a\u5347\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u4e00\u4e2a<strong>\u6559\u79d1\u4e66\u7ea7\u7684\u78c1\u76d8 I\/O \u74f6\u9888\u6848\u4f8b<\/strong>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u53ef\u80fd\u7684\u76f4\u63a5\u8bf1\u56e0\uff1a\u6587\u4ef6\u540c\u6b65\u884c\u4e3a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fdb\u4e00\u6b65\u7ed3\u5408\u4e1a\u52a1\u573a\u666f\uff0c\u53d1\u73b0\u4e00\u4e2a\u9ad8\u5ea6\u76f8\u5173\u7684\u53ef\u80fd\u6027\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u7528\u6237\u6b63\u5728\u8fdb\u884c\u6587\u4ef6\u540c\u6b65\u64cd\u4f5c\uff08\u5982\u79c1\u6709\u4e91\u5ba2\u6237\u7aef\u540c\u6b65\uff09<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u7c7b\u540c\u6b65\u5177\u6709\u4ee5\u4e0b\u7279\u5f81\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u91cf\u5c0f\u6587\u4ef6<\/li>\n\n\n\n<li>\u9ad8\u9891\u5143\u6570\u636e\u66f4\u65b0<\/li>\n\n\n\n<li>\u6570\u636e\u5e93\u8868\uff08\u5982 file cache\u3001activity\u3001lock \u8868\uff09\u88ab\u9891\u7e41\u5199\u5165<\/li>\n\n\n\n<li>\u541e\u5410\u91cf\u4e0d\u9ad8\uff0c\u4f46 IOPS \u4e0e fsync \u538b\u529b\u6781\u5927<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u8868\u73b0\u5f62\u5f0f\u4e0e\u5f53\u524d\u76d1\u63a7\u6570\u636e\u5b8c\u5168\u4e00\u81f4\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e03\u3001\u662f\u5426\u5c5e\u4e8e\u5f02\u5e38\u72b6\u6001\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ed3\u8bba\u662f\uff1a<strong>\u4e0d\u662f\u5f02\u5e38\uff0c\u800c\u662f\u786c\u4ef6\u80fd\u529b\u8fb9\u754c\u7684\u4f53\u73b0<\/strong>\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7cfb\u7edf\u4e0d\u4f1a\u7acb\u5373\u5d29\u6e83<\/li>\n\n\n\n<li>\u4e0d\u4f1a\u89e6\u53d1 OOM<\/li>\n\n\n\n<li>\u4e0d\u4f1a\u9020\u6210\u6570\u636e\u635f\u574f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u5728\u8be5\u72b6\u6001\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u54cd\u5e94\u5ef6\u8fdf\u4f1a\u4e0a\u5347<\/li>\n\n\n\n<li>\u4e0d\u9002\u5408\u7ee7\u7eed\u589e\u52a0\u5199\u5bc6\u96c6\u578b\u670d\u52a1<\/li>\n\n\n\n<li>\u4e0d\u9002\u5408\u8fdb\u884c\u6279\u91cf\u626b\u63cf\u3001\u7d22\u5f15\u6216\u7ef4\u62a4\u64cd\u4f5c<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516b\u3001\u53ef\u884c\u7684\u5e94\u5bf9\u7b56\u7565\uff08\u4e0d\u5347\u7ea7\u786c\u4ef6\u524d\u63d0\u4e0b\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u77ed\u671f\uff08\u6b62\u8840\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b49\u5f85\u540c\u6b65\u7c7b\u4efb\u52a1\u81ea\u7136\u7ed3\u675f<\/li>\n\n\n\n<li>\u907f\u514d\u5e76\u53d1\u6267\u884c\u6570\u636e\u5e93\u7ef4\u62a4\u4efb\u52a1<\/li>\n\n\n\n<li>\u63a7\u5236\u65e5\u5fd7\u7ea7\u522b\uff0c\u907f\u514d debug \u5199\u76d8<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e2d\u671f\uff08\u7f13\u89e3\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51cf\u5c11\u6570\u636e\u5e93\u4e0d\u5fc5\u8981\u7684\u540c\u6b65\u5199<\/li>\n\n\n\n<li>\u5408\u7406\u89c4\u5212\u6587\u4ef6\u540c\u6b65\u884c\u4e3a\uff08\u907f\u514d\u9891\u7e41\u5168\u91cf\u626b\u63cf\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u957f\u671f\uff08\u6839\u6cbb\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5347\u7ea7\u78c1\u76d8\u6027\u80fd\uff08SSD \/ NVMe\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8be5\u6848\u4f8b\u4e2d\uff0c<strong>\u78c1\u76d8\u662f\u552f\u4e00\u660e\u786e\u7684\u6027\u80fd\u5929\u82b1\u677f<\/strong>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e5d\u3001\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6b21\u6392\u67e5\u7684\u5173\u952e\u4ef7\u503c\u4e0d\u5728\u4e8e\u201c\u53d1\u73b0\u95ee\u9898\u201d\uff0c\u800c\u5728\u4e8e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6ca1\u6709\u51ed\u611f\u89c9\u4e0b\u7ed3\u8bba<\/li>\n\n\n\n<li>\u6309\u5c42\u6b21\u9010\u6b65\u7f29\u5c0f\u8303\u56f4<\/li>\n\n\n\n<li>\u4f7f\u7528\u4e86\u6b63\u786e\u7684\u5de5\u5177<\/li>\n\n\n\n<li>\u5f97\u5230\u4e86\u53ef\u9a8c\u8bc1\u3001\u53ef\u590d\u73b0\u7684\u5224\u65ad<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>top \u2192 iostat \u2192 iotop<\/strong> \u7684\u7ec4\u5408\uff0c\u662f\u6392\u67e5 Linux I\/O \u6027\u80fd\u95ee\u9898\u7684\u7a33\u5b9a\u8def\u5f84\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53 CPU \u4e0e\u5185\u5b58\u770b\u4f3c\u5145\u8db3\uff0c\u5374\u51fa\u73b0\u7cfb\u7edf\u201c\u5361\u987f\u201d\u65f6\uff0c\u78c1\u76d8 I\/O \u5f80\u5f80\u624d\u662f\u771f\u6b63\u7684\u74f6\u9888\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\uff08\u5168\u6587\u5df2\u8131\u654f\uff0c\u4fa7\u91cd\u5de5\u7a0b\u5206\u6790\u65b9\u6cd5\uff0c\u4e0d\u6d89\u53ca\u5177\u4f53\u4e1a\u52a1\u7ec6\u8282\uff09<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u95ee\u9898\u80cc\u666f \u5728\u4e00\u53f0\u957f\u671f\u7a33\u5b9a\u8fd0\u884c\u7684 Linux \u670d\u52a1\u5668\u4e0a\uff0c\u8fd1\u671f\u89c2\u5bdf\u5230\u4ee5\u4e0b\u73b0\u8c61\uff1a \u521d\u6b65\u5224\u65ad\uff1a\u74f6\u9888\u4e0d\u5728 CPU 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