{"id":415,"date":"2012-07-01T12:10:51","date_gmt":"2012-07-01T04:10:51","guid":{"rendered":"http:\/\/blog.jianguoyun.com\/?p=415"},"modified":"2012-10-16T15:12:28","modified_gmt":"2012-10-16T07:12:28","slug":"%e9%97%b0%e7%a7%92%e5%af%bc%e8%87%b4%e7%b3%bb%e7%bb%9fcpu%e5%88%a9%e7%94%a8%e7%8e%87%e6%9a%b4%e6%b6%a8","status":"publish","type":"post","link":"https:\/\/blog.jianguoyun.com\/?p=415","title":{"rendered":"\u4e92\u8054\u7f51\u7cfb\u7edf\u91cd\u542f\u65e5"},"content":{"rendered":"<p>\u5317\u4eac\u65f6\u95f4\u4eca\u5929\u65e9\u4e0a7:59:59\uff0c<a href=\"https:\/\/jianguoyun.com\/\" target=\"_blank\">\u575a\u679c\u4e91<\/a>\u7684\u6240\u6709Linux \u64cd\u4f5c\u7cfb\u7edf \uff08CentOS 6.2)\u90fd\u51fa\u73b0CPU\u5229\u7528\u7387\u66b4\u6da8\u7684\u73b0\u8c61\uff0c\u4e3b\u8981\u5f71\u54cd\u7684\u8fdb\u7a0b\u5305\u62ecJava\uff0cMySQL\u7b49\u3002\u76f4\u63a5\u91cd\u542fJava\u548cMySQL\u4e0d\u80fd\u89e3\u51b3\u95ee\u9898\u3002\u540e\u5f97\u77e5\uff0c\u8be5\u73b0\u8c61\u4e0d\u4ec5\u53d1\u751f\u5728\u575a\u679c\u4e91\u7684\u670d\u52a1\u5668\uff0c\u5f88\u591a\u4e92\u8054\u7f51\u516c\u53f8\u7684\u670d\u52a1\u5668\u90fd\u5728\u8fd9\u4e00\u523b\u51fa\u73b0\u4e86\u4e0d\u540c\u7a0b\u5ea6\u7684CPU\u5229\u7528\u7387\u589e\u957f\uff01<\/p>\n<p>\u7ecf\u8fc7\u6211\u4eec\u7d27\u6025\u7684\u5206\u6790\u548c\u8c03\u8bd5\uff0c\u53d1\u73b0\u662f\u56e0\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u5728\u5904\u7406\u95f0\u79d2\u7684\u65f6\u5019\uff0c\u5bfc\u81f4\u90e8\u5206\u8bd5\u56fe\u83b7\u53d6\u5f53\u524d\u7cfb\u7edf\u65f6\u95f4\u7684\u8fdb\u7a0b\u51fa\u73b0Live Lock\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u67d0\u4e2a\u8fdb\u7a0b\/\u7ebf\u7a0b\u5728\u67e5\u8be2\u7cfb\u7edf\u65f6\u95f4\u7684\u65f6\u5019\uff0c\u8fdb\u5165\u4e86\u4e00\u79cd\u7c7b\u4f3c\u6b7b\u5faa\u73af\u7684\u72b6\u6001\uff0cCPU\u5229\u7528\u7387\u5f88\u9ad8\uff0c\u540c\u65f6\u4e0d\u80fd\u5b8c\u6210\u65f6\u95f4\u67e5\u8be2\u3002<\/p>\n<p>\u6211\u4eec\u731c\u6d4bJVM\u548cMySQL\u8bd5\u56fe\u901a\u8fc7CPU\u786c\u4ef6\u6676\u632f\u7684\u6570\u636e\u83b7\u5f97\u5f53\u524d\u7cbe\u786e\u7684\u65f6\u95f4\uff0c\u7531\u4e8e\u95f0\u79d2\u7684\u5173\u7cfb\uff0c\u8fd9\u4e2a\u65f6\u95f4\u548c\u64cd\u4f5c\u7cfb\u7edf\u7ef4\u6301\u7684\u5899\u4e0a\u65f6\u95f4\uff08Wall Time\uff0c\u4e5f\u5c31\u662f\u663e\u793a\u7ed9\u7528\u6237\u770b\u7684\u65f6\u95f4\uff09\u4e0d\u4e00\u81f4\uff0c\u5bfc\u81f4\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<p>\u7cfb\u7edf\u65f6\u95f4\u5bf9\u4e8e\u5404\u79cd\u670d\u52a1\u5668\u7a0b\u5e8f\u5c24\u4e3a\u91cd\u8981\uff0c\u4f8b\u5982\u5728\u575a\u679c\u4e91\u7684\u7cfb\u7edf\u4e2d\uff0c\u5f88\u591a\u8282\u70b9\u90fd\u5b9a\u671f\u6536\u96c6\u548c\u62a5\u544a\u7cfb\u7edf\u72b6\u6001\uff0c\u5982\u679c\u7cfb\u7edf\u65f6\u95f4\u65e0\u6cd5\u83b7\u53d6\uff0c\u53ef\u80fd\u5bfc\u81f4\u90e8\u5206\u8282\u70b9\u88ab\u8bef\u5224\u4e3a\u6545\u969c\uff0c\u81ea\u52a8\u5f15\u8d77\u4e00\u7cfb\u5217\u4e0d\u5fc5\u8981\u7684\u6545\u969c\u6062\u590d\u52a8\u4f5c\u3002<\/p>\n<p>\u901a\u8fc7twitter, \u90ae\u4ef6\u5217\u8868\uff0c\u8bba\u575b\u7b49\u5176\u4ed6\u5a92\u4f53\uff0c\u6211\u4eec\u53d1\u73b0\u5f88\u591a\u4e92\u8054\u7f51\u670d\u52a1\u5546\u90fd\u78b0\u5230\u7c7b\u4f3c\u95ee\u9898\uff0c\u5e76\u4e14\u7ed9\u51fa\u7684\u65b9\u6cd5\u591a\u662f\u91cd\u542f\u670d\u52a1\u5668\u3002\u575a\u679c\u4e91\u56e2\u961f\u620f\u79f0\u8fd9\u662f\u4e92\u8054\u7f51\u5168\u7f51\u7edf\u4e00\u91cd\u542f\u670d\u52a1\u5668\u7684\u65e5\u5b50\u3002<\/p>\n<p>\u4e0e\u5927\u5bb6\u4e00\u6837\uff0c\u6211\u4eec\u9996\u5148\u9009\u62e9\u7684\u65b9\u5f0f\u662f\u6309\u7167\u987a\u5e8f\u91cd\u542f\u6240\u6709\u670d\u52a1\u5668\uff0c\u91cd\u65b0\u542f\u52a8\u670d\u52a1\u5668\u786e\u5b9e\u80fd\u591f\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u4e0d\u8fc7\u8fd9\u4e2a\u8fc7\u7a0b\u8017\u65f6\u957f\uff0c\u800c\u4e14\u5bb9\u6613\u51fa\u9519\u3002<\/p>\n<p>\u5e78\u8fd0\u7684\u662f\uff0c\u8c22\u8c22<a href=\"http:\/\/blog.mozilla.org\/it\/2012\/06\/30\/mysql-and-the-leap-second-high-cpu-and-the-fix\/\">Mozilla\u7684\u4e00\u7bc7blog<\/a>, \u4e5f\u8c22\u8c22Google\u5feb\u901f\u7075\u6d3b\u7684\u5b9e\u65f6\u7d22\u5f15\uff0c\u6211\u4eec\u5728\u91cd\u542f\u670d\u52a1\u5668\u7684\u8fc7\u7a0b\u4e2d\uff0c\u53d1\u73b0\u4e86\u5982\u4e0b\u66f4\u7b80\u5355\u7684\u89e3\u51b3\u529e\u6cd5:<\/p>\n<blockquote><p><code>$ cat files\/bin\/leap-second.sh <\/code><br \/>\n<code># this is a quick-fix to the 6\/30\/12 leap second bug<\/code><\/p>\n<p><code>if [ ! -f \/tmp\/leapsecond_2012_06_30 ]<\/code><br \/>\n<code> then<\/code><br \/>\n<code> \/etc\/init.d\/ntpd stop; date `date +\"%m%d%H%M%C%y.%S\"` &amp;&amp; \/bin\/touch \/tmp\/leapsecond_2012_06_30<\/code><br \/>\n<code>fi<\/code><\/p><\/blockquote>\n<p>\u8fd9\u4e2a\u811a\u672c\u53ea\u662f\u7b80\u5355\u7684\u5f3a\u5236\u91cd\u7f6e\u7cfb\u7edf\u65f6\u95f4\uff0c\u4ece\u800c\u8ba9\u7cfb\u7edf\u4e2d\u6240\u6709\u65f6\u95f4\u56de\u5230\u540c\u6b65\u7684\u72b6\u6001\u3002\u5b8c\u6210\u540e\uff0c\u4f60\u53ef\u4ee5\u786e\u8ba4\u6240\u6709\u670d\u52a1\u7684\u72b6\u6001\u56de\u5230\u6b63\u5e38\uff0c\u7136\u540e\u624b\u52a8\u91cd\u542fntp\u670d\u52a1\u3002\u7c7b\u4f3cmozilla, \u6211\u4eec\u4e5f\u4f7f\u7528puppet\u5c06\u8be5\u811a\u672c\u5728\u6240\u6709\u670d\u52a1\u5668\u4e0a\u6267\u884c\u3002<\/p>\n<p>\u6216\u8bb8\u78b0\u5230\u95ee\u9898\u7684\u7ba1\u7406\u5458\u90fd\u53ef\u4ee5\u7528\u8fd9\u4e2a\u529e\u6cd5\u89e3\u51b3\u3002\u8fd9\u662f\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\u540e\u7684CPU\u5229\u7528\u7387\u53d8\u5316\u3002<\/p>\n<p><a href=\"http:\/\/blog.jianguoyun.com\/wp-content\/uploads\/2012\/07\/Screenshot.png\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-418\" title=\"Screenshot\" src=\"http:\/\/blog.jianguoyun.com\/wp-content\/uploads\/2012\/07\/Screenshot.png\" alt=\"\" width=\"365\" height=\"177\" \/><\/a><\/p>\n<p>\u6700\u540e\uff0c\u5e0c\u671b\u822a\u7a7a\u822a\u5929\uff0c\u533b\u7597\u7b49\u7b49\u91cd\u8981\u7cfb\u7edf\u4e0d\u4f1a\u53d7\u5230\u8fd9\u4e2a\u95ee\u9898\u7684\u5f71\u54cd\u3002\u5728\u8fd9\u4e9b\u9886\u57df\uff0c\u91cd\u542f\u7cfb\u7edf\u5f88\u53ef\u80fd\u4f1a\u9020\u6210\u5de8\u5927\u7684\u4f24\u5bb3\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5317\u4eac\u65f6\u95f4\u4eca\u5929\u65e9\u4e0a7:59:59\uff0c\u575a\u679c\u4e91\u7684\u6240\u6709Linux \u64cd\u4f5c\u7cfb\u7edf \uff08CentOS 6.2)\u90fd\u51fa\u73b0CPU\u5229\u7528\u7387\u66b4 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/posts\/415"}],"collection":[{"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=415"}],"version-history":[{"count":12,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/posts\/415\/revisions"}],"predecessor-version":[{"id":636,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/posts\/415\/revisions\/636"}],"wp:attachment":[{"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}