{"id":2338,"date":"2015-08-25T17:02:07","date_gmt":"2015-08-25T09:02:07","guid":{"rendered":"http:\/\/www.chenlianfu.com\/?p=2338"},"modified":"2015-08-25T17:02:07","modified_gmt":"2015-08-25T09:02:07","slug":"%e7%a3%81%e7%9b%98io%e6%a3%80%e6%b5%8b%e5%b7%a5%e5%85%b7-iostat-%e7%9a%84%e7%ae%80%e5%8d%95%e4%bd%bf%e7%94%a8%e8%af%b4%e6%98%8e","status":"publish","type":"post","link":"http:\/\/www.chenlianfu.com\/?p=2338","title":{"rendered":"\u78c1\u76d8IO\u68c0\u6d4b\u5de5\u5177 iostat \u7684\u7b80\u5355\u4f7f\u7528\u8bf4\u660e"},"content":{"rendered":"<h1>1. iostat \u7684\u5e38\u7528\u4f8b\u5b50\u548c\u5e38\u7528\u53c2\u6570<\/h1>\n<p>iostat \u7684\u5e38\u7528\u4f8b\u5b50\uff1a<\/p>\n<pre>\r\n$ iostat -c -d 1 10\r\n$ iostat -c -x -m 1 10\r\n$ iostat -c -x \/dev\/sda \/dev\/sdb 1 10\r\n\u4e0a\u4e2a\u547d\u4ee4\u8868\u793a\u5bf9 \/dev\/sda \u548c \/dev\/sdb \u4e24\u4e2a\u78c1\u76d8\u8fdb\u884c I\/O \u7edf\u8ba1\uff0c\u6bcf\u79d2\u7edf\u8ba1\u4e00\u6b21\uff0c\u5171\u7edf\u8ba110\u6b21\u3002\r\n<\/pre>\n<p>iostat \u7684\u5e38\u7528\u53c2\u6570\uff1a<\/p>\n<pre>\r\n-c\r\n    \u663e\u793a CPU \u7684\u4f7f\u7528\u60c5\u51b5\r\n-d\r\n    \u663e\u793a\u8bbe\u5907\u7684\u4f7f\u7528\u60c5\u51b5\r\n-x\r\n    \u663e\u793a\u6269\u5c55\u7edf\u8ba1\u6570\u636e\u3002\u82e5\u8bbe\u7f6e\u4e86 -x \u53c2\u6570\uff0c\u5219 -d \u53c2\u6570\u5931\u6548\r\n-k\r\n    \u4f7f\u7528 Kb \u4f5c\u4e3a\u5355\u4f4d\r\n-m\r\n    \u4f7f\u7528 Mb \u4f5c\u4e3a\u5355\u4f4d\r\n<\/pre>\n<h1>2. iostat \u4f7f\u7528\u6ce8\u610f\u4e8b\u9879<\/h1>\n<p>1. \u9700\u8981\u8fdb\u884c\u591a\u6b21\u7edf\u8ba1\uff0c\u591a\u6b21\u7edf\u8ba1\u7684\u7ed3\u679c\u662f\u5b9e\u65f6\u7684\u7ed3\u679c\u3002<\/p>\n<p>2. \u4f7f\u7528 -c \u53c2\u6570\u80fd\u5f97\u5230 CPU \u7684\u4f7f\u7528\u7edf\u8ba1\u3002 %iowait \u8868\u793a\u7cfb\u7edf\u6709 I\/O request \u7684 CPU \u7a7a\u95f2\u65f6\u95f4\u3002<\/p>\n<p>3. \u4f7f\u7528 -d \u53c2\u6570\uff0c\u5176\u7edf\u8ba1\u7ed3\u679c\u4e2d tps\uff08the number of transfers per second\uff09 \u8868\u793a\u8bbe\u5907\u6bcf\u79d2\u7684\u4f20\u8f93\u6b21\u6570\u3002<\/p>\n<p>4. \u4f7f\u7528 -x \u53c2\u6570\uff0c %util \u8868\u793a\u78c1\u76d8\u4f7f\u7528\u7387\uff0c\u5373\u5904\u7406 I\/O request \u7684\u65f6\u95f4\u7684\u6bd4\u7387\u3002\u8be5\u503c\u63a5\u8fd1 100%\uff0c\u8868\u660e I\/O \u6210\u4e86\u74f6\u9888\u3002\u82e5\u6b64\u65f6 CPU \u7684\u4f7f\u7528\u7387\u6bd4\u9884\u671f\u4f4e\uff0c\u5219\u8868\u793a\u78c1\u76d8\u6027\u80fd\u4e0d\u591f\uff0c\u5bfc\u81f4 CPU \u4e0d\u80fd\u5145\u5206\u5229\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. iostat \u7684\u5e38\u7528\u4f8b\u5b50\u548c\u5e38\u7528\u53c2\u6570 iostat \u7684\u5e38\u7528\u4f8b\u5b50\uff1a $ ios &hellip; <a href=\"http:\/\/www.chenlianfu.com\/?p=2338\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[10],"_links":{"self":[{"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/posts\/2338"}],"collection":[{"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2338"}],"version-history":[{"count":1,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/posts\/2338\/revisions"}],"predecessor-version":[{"id":2339,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/posts\/2338\/revisions\/2339"}],"wp:attachment":[{"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2338"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}