{"id":395,"date":"2012-03-14T12:09:08","date_gmt":"2012-03-14T12:09:08","guid":{"rendered":""},"modified":"2013-02-07T12:10:28","modified_gmt":"2013-02-07T04:10:28","slug":"apache-%e7%9a%84prefork-mpm%e5%92%8cworker-mpm","status":"publish","type":"post","link":"https:\/\/dingxuan.info\/wp\/?p=395","title":{"rendered":"Apache \u7684prefork MPM\u548cworker MPM"},"content":{"rendered":"<p>\u672c\u6587\u7ed9\u51fa\u4e86\u4e00\u4e9b\u5177\u4f53\u8bbe\u7f6e\u6570\u503c\u3002\u4f46\u6ca1\u6709\u8003\u8651\u786c\u4ef6\u60c5\u51b5\u3002\u6240\u4ee5\u5177\u4f53\u6570\u503c\u4e0d\u591f\u4e25\u8c28\uff0c\u4ec5\u4f9b\u53c2\u8003\u5404\u9879\u8bbe\u7f6e\u542b\u4e49\u3002<br \/>\u53e6\u4e00\u7bc7\u6587\u7ae0\u4e2d\uff0c\u7ed9\u51fa\u4e86\u4e00\u4e2a\u8bbe\u7f6e\u7b97\u6cd5\u3002\u8ba1\u7b97\u51fa\u6765\u7684\u6570\u503c\u8fdc\u8fdc\u5c0f\u4e8e\u672c\u6587\u7684\u5efa\u8bae\u3002<br \/>\u89c1\uff1a<a href=\"http:\/\/dingxuan.info\/blog\/post\/tuning-Apache-Prefork-MPM.php\">http:\/\/dingxuan.info\/blog\/post\/tuning-Apache-Prefork-MPM.php<\/a><br \/><br \/>Apache\u4f7f\u7528\u54ea\u79cdMPM\u5728\u5728\u5b89\u88c5\u7684\u65f6\u5019\u53ef\u4ee5\u7528<br \/>&#8211;with-mpm=&#123;beos&#124;worker&#124;prefork&#124;mpmt_os2&#124;perchild&#124;leader&#124;threadpool&#125;<br \/>\u5b89\u88c5\u4e4b\u540e\u53ef\u4ee5\u7528httpd -l\u547d\u4ee4\u770b\u5230\u3002<br \/>MPM\u7684\u8fdb\u7a0b\u6a21\u5757\u6709\u6709\u5f88\u591a\u79cd( \u89c1Apache\u5b98\u65b9\u6587\u6863\uff1a<a href=\"http:\/\/httpd.apache.org\/docs-2.0\/mod\/\">http:\/\/httpd.apache.org\/docs-2.0\/mod\/<\/a>)\u3002<br \/>\u4eca\u5929\u6211\u4e3b\u8981\u662f\u6bd4\u8f83\u4e00\u4e0bprefork MPM\u548cworker MPM<!--more--><br \/>httpd.conf\u7684prefork\u7684\u914d\u7f6e\u53c2\u6570\uff1a<br \/># prefork MPM<br \/># StartServers: number of server processes to start<br \/># MinSpareServers: minimum number of server processes which are kept spare<br \/># MaxSpareServers: maximum number of server processes which are kept spare<br \/># MaxClients: maximum number of server processes allowed to start<br \/># MaxRequestsPerChild: maximum number of requests a server process serves<br \/><br \/>StartServers&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;35<br \/>MinSpareServers&nbsp;&nbsp;&nbsp;&nbsp; 80<br \/>MaxSpareServers&nbsp;&nbsp;&nbsp;&nbsp; 100<br \/>ServerLimit&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1000<br \/>MaxClients&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;150<br \/>MaxRequestsPerChild&nbsp;&nbsp;0<br \/>\n<br \/>prefork\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff0c\u63a7\u5236\u8fdb\u7a0b\u5728\u6700\u521d\u5efa\u7acb\u201cStartServers\u201d\u4e2a\u5b50\u8fdb\u7a0b\u540e\uff0c\u4e3a\u4e86\u6ee1\u8db3MinSpareServers\u8bbe\u7f6e\u7684\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u8fdb\u7a0b\uff0c<br \/>\u7b49\u5f85\u4e00\u79d2\u949f\uff0c\u7ee7\u7eed\u521b\u5efa\u4e24\u4e2a\uff0c\u518d\u7b49\u5f85\u4e00\u79d2\u949f\uff0c\u7ee7\u7eed\u521b\u5efa\u56db\u4e2a\u2026\u2026\u5982\u6b64\u6309\u6307\u6570\u7ea7\u589e\u52a0\u521b\u5efa\u7684\u8fdb\u7a0b\u6570\uff0c\u6700\u591a\u8fbe\u5230\u6bcf\u79d232\u4e2a\uff0c<br \/>\u76f4\u5230\u6ee1\u8db3MinSpareServers\u8bbe\u7f6e\u7684\u503c\u4e3a\u6b62\u3002\u8fd9\u5c31\u662f\u9884\u6d3e\u751f\uff08prefork\uff09\u7684\u7531\u6765\u3002\u8fd9\u79cd\u6a21\u5f0f\u53ef\u4ee5\u4e0d\u5fc5\u5728\u8bf7\u6c42\u5230\u6765\u65f6\u518d\u4ea7\u751f\u65b0\u7684\u8fdb\u7a0b\uff0c<br \/>\u4ece\u800c\u51cf\u5c0f\u4e86\u7cfb\u7edf\u5f00\u9500\u4ee5\u589e\u52a0\u6027\u80fd\u3002<br \/>MaxSpareServers\u8bbe\u7f6e\u4e86\u6700\u5927\u7684\u7a7a\u95f2\u8fdb\u7a0b\u6570\uff0c\u5982\u679c\u7a7a\u95f2\u8fdb\u7a0b\u6570\u5927\u4e8e\u8fd9\u4e2a\u503c\uff0cApache\u4f1a\u81ea\u52a8kill\u6389\u4e00\u4e9b\u591a\u4f59\u8fdb\u7a0b\u3002\u8fd9\u4e2a\u503c\u4e0d\u8981\u8bbe\u5f97\u8fc7\u5927\uff0c<br \/>\u4f46\u5982\u679c\u8bbe\u7684\u503c\u6bd4MinSpareServers\u5c0f\uff0cApache\u4f1a\u81ea\u52a8\u628a\u5176\u8c03\u6574\u4e3aMinSpareServers+1\u3002\u5982\u679c\u7ad9\u70b9\u8d1f\u8f7d\u8f83\u5927\uff0c<br \/>\u53ef\u8003\u8651\u540c\u65f6\u52a0\u5927MinSpareServers\u548cMaxSpareServers\u3002<br \/>MaxRequestsPerChild\u8bbe\u7f6e\u7684\u662f\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u53ef\u5904\u7406\u7684\u8bf7\u6c42\u6570\u3002\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u5728\u5904\u7406\u4e86\u201cMaxRequestsPerChild\u201d\u4e2a\u8bf7\u6c42\u540e\u5c06\u81ea\u52a8\u9500\u6bc1\u3002<br \/>&nbsp;&nbsp;0\u610f\u5473\u7740\u65e0\u9650\uff0c\u5373\u5b50\u8fdb\u7a0b\u6c38\u4e0d\u9500\u6bc1\u3002\u867d\u7136\u7f3a\u7701\u8bbe\u4e3a0\u53ef\u4ee5\u4f7f\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u5904\u7406\u66f4\u591a\u7684\u8bf7\u6c42\uff0c\u4f46\u5982\u679c\u8bbe\u6210\u975e\u96f6\u503c\u4e5f\u6709\u4e24\u70b9\u91cd\u8981\u7684\u597d\u5904\uff1a<br \/>\u25c6 \u53ef\u9632\u6b62\u610f\u5916\u7684\u5185\u5b58\u6cc4\u6f0f\uff1b<br \/>\u25c6 \u5728\u670d\u52a1\u5668\u8d1f\u8f7d\u4e0b\u964d\u7684\u65f6\u4faf\u4f1a\u81ea\u52a8\u51cf\u5c11\u5b50\u8fdb\u7a0b\u6570\u3002<br \/>\u56e0\u6b64\uff0c\u53ef\u6839\u636e\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\u6765\u8c03\u6574\u8fd9\u4e2a\u503c\u3002\u5927\u5bb6\u53ef\u4ee5\u6d4b\u8bd5\u4e00\u4e0b\u5408\u9002\u7684\u503c\u3002<br \/>MaxClients\u662f\u8fd9\u4e9b\u6307\u4ee4\u4e2d\u6700\u4e3a\u91cd\u8981\u7684\u4e00\u4e2a\uff0c\u8bbe\u5b9a\u7684\u662fApache\u53ef\u4ee5\u540c\u65f6\u5904\u7406\u7684\u8bf7\u6c42\uff0c\u662f\u5bf9Apache\u6027\u80fd\u5f71\u54cd\u6700\u5927\u7684\u53c2\u6570\u3002<br \/>\u5176\u7f3a\u7701\u503c150\u662f\u8fdc\u8fdc\u4e0d\u591f\u7684\uff0c\u5982\u679c\u8bf7\u6c42\u603b\u6570\u5df2\u8fbe\u5230\u8fd9\u4e2a\u503c\uff08\u53ef\u901a\u8fc7ps -ef&#124;grep http&#124;wc -l\u5bdf\u770b\uff09\uff0c\u90a3\u4e48\u540e\u9762\u7684\u8bf7\u6c42\u5c31\u8981\u6392\u961f\uff0c<br \/>\u76f4\u5230\u67d0\u4e2a\u5df2\u5904\u7406\u8bf7\u6c42\u5b8c\u6bd5\u3002\u8fd9\u5c31\u662f\u7cfb\u7edf\u8d44\u6e90\u8fd8\u5269\u4e0b\u5f88\u591a\u800cHTTP\u8bbf\u95ee\u5374\u5f88\u6162\u7684\u4e3b\u8981\u539f\u56e0\u3002\u7cfb\u7edf\u7ba1\u7406\u5458\u53ef\u4ee5\u6839\u636e\u786c\u4ef6\u914d\u7f6e\u548c\u8d1f\u8f7d\u60c5\u51b5\u6765\u52a8\u6001\u8c03\u6574\u8fd9\u4e2a\u503c\u3002<br \/>\u867d\u7136\u7406\u8bba\u4e0a\u8fd9\u4e2a\u503c\u8d8a\u5927\uff0c\u53ef\u4ee5\u5904\u7406\u7684\u8bf7\u6c42\u5c31\u8d8a\u591a\u3002\u4f46\u662f\u4e5f\u4e0d\u662f\u8d8a\u5927\u8d8a\u597d\uff0c\u592a\u5927\u8d44\u6e90\u6d88\u8017\u5b8c\u4e86\u4e5f\u662f\u5f71\u54cd\u6027\u529f\u80fd\u3002<br \/>ServerLimit\u7684\u6700\u5927\u503c\u662f20000\uff0c\u5bf9\u4e8e\u5927\u591a\u6570\u7ad9\u70b9\u5df2\u7ecf\u8db3\u591f\u3002\u5982\u679c\u4e00\u5b9a\u8981\u518d\u52a0\u5927\u8fd9\u4e2a\u6570\u503c\uff0c\u5bf9\u4f4d\u4e8e\u6e90\u4ee3\u7801\u6811\u4e0bserver\/mpm\/prefork\/prefork.c\u4e2d\u4ee5\u4e0b\u4e24\u884c\u505a\u76f8\u5e94\u4fee\u6539\u5373\u53ef\uff1a<br \/>define DEFAULT_SERVER_LIMIT 256 <br \/>define MAX_SERVER_LIMIT 20000<br \/><br \/>httpd.conf\u7684worker\u7684\u914d\u7f6e\u53c2\u6570\uff1a<br \/># worker MPM<br \/># StartServers: initial number of server processes to start<br \/># MaxClients: maximum number of simultaneous client connections<br \/># MinSpareThreads: minimum number of worker threads which are kept spare<br \/># MaxSpareThreads: maximum number of worker threads which are kept spare<br \/># ThreadsPerChild: constant number of worker threads in each server process<br \/># MaxRequestsPerChild: maximum number of requests a server process serves<br \/><br \/>StartServers&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2<br \/>MaxClients&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 150<br \/>MinSpareThreads&nbsp;&nbsp;&nbsp;&nbsp; 25<br \/>MaxSpareThreads&nbsp;&nbsp;&nbsp;&nbsp; 75 <br \/>ThreadsPerChild&nbsp;&nbsp;&nbsp;&nbsp; 25<br \/>MaxRequestsPerChild&nbsp;&nbsp;0<br \/>\n<br \/>worker\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff0c\u7531\u4e3b\u63a7\u5236\u8fdb\u7a0b\u751f\u6210\u201cStartServers\u201d\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u4e2d\u5305\u542b\u56fa\u5b9a\u7684ThreadsPerChild\u7ebf\u7a0b\u6570\uff0c\u5404\u4e2a\u7ebf\u7a0b\u72ec\u7acb\u5730\u5904\u7406\u8bf7\u6c42\u3002<br \/>\u540c\u6837\uff0c\u4e3a\u4e86\u4e0d\u5728\u8bf7\u6c42\u5230\u6765\u65f6\u518d\u751f\u6210\u7ebf\u7a0b\uff0cMinSpareThreads\u548cMaxSpareThreads\u8bbe\u7f6e\u4e86\u6700\u5c11\u548c\u6700\u591a\u7684\u7a7a\u95f2\u7ebf\u7a0b\u6570\uff1b\u800cMaxClients\u8bbe\u7f6e\u4e86\u6240\u6709\u5b50\u8fdb\u7a0b\u4e2d\u7684\u7ebf\u7a0b\u603b\u6570\u3002<br \/>\u5982\u679c\u73b0\u6709\u5b50\u8fdb\u7a0b\u4e2d\u7684\u7ebf\u7a0b\u603b\u6570\u4e0d\u80fd\u6ee1\u8db3\u8d1f\u8f7d\uff0c\u63a7\u5236\u8fdb\u7a0b\u5c06\u6d3e\u751f\u65b0\u7684\u5b50\u8fdb\u7a0b\u3002<br \/>MinSpareThreads\u548cMaxSpareThreads\u7684\u6700\u5927\u7f3a\u7701\u503c\u5206\u522b\u662f75\u548c250\u3002\u8fd9\u4e24\u4e2a\u53c2\u6570\u5bf9Apache\u7684\u6027\u80fd\u5f71\u54cd\u5e76\u4e0d\u5927\uff0c\u53ef\u4ee5\u6309\u7167\u5b9e\u9645\u60c5\u51b5\u76f8\u5e94\u8c03\u8282\u3002<br \/>ThreadsPerChild\u662fworker MPM\u4e2d\u4e0e\u6027\u80fd\u76f8\u5173\u6700\u5bc6\u5207\u7684\u6307\u4ee4\u3002ThreadsPerChild\u7684\u6700\u5927\u7f3a\u7701\u503c\u662f64\uff0c\u5982\u679c\u8d1f\u8f7d\u8f83\u5927\uff0c64\u4e5f\u662f\u4e0d\u591f\u7684\u3002<br \/>\u8fd9\u65f6\u8981\u663e\u5f0f\u4f7f\u7528ThreadLimit\u6307\u4ee4\uff0c\u5b83\u7684\u6700\u5927\u7f3a\u7701\u503c\u662f20000\u3002\u4e0a\u8ff0\u4e24\u4e2a\u503c\u4f4d\u4e8e\u6e90\u7801\u6811server\/mpm\/worker\/worker.c\u4e2d\u7684\u4ee5\u4e0b\u4e24\u884c\uff1a<br \/>define DEFAULT_THREAD_LIMIT 64 <br \/>define MAX_THREAD_LIMIT 20000<br \/>\u8fd9\u4e24\u884c\u5bf9\u5e94\u7740ThreadsPerChild\u548cThreadLimit\u7684\u9650\u5236\u6570\u3002\u6700\u597d\u5728configure\u4e4b\u524d\u5c31\u628a64\u6539\u6210\u6240\u5e0c\u671b\u7684\u503c\u3002\u6ce8\u610f\uff0c\u4e0d\u8981\u628a\u8fd9\u4e24\u4e2a\u503c\u8bbe\u5f97\u592a\u9ad8\uff0c<br \/>\u8d85\u8fc7\u7cfb\u7edf\u7684\u5904\u7406\u80fd\u529b\uff0c\u4ece\u800c\u56e0Apache\u4e0d\u8d77\u52a8\u4f7f\u7cfb\u7edf\u5f88\u4e0d\u7a33\u5b9a\u3002<br \/>Worker\u6a21\u5f0f\u4e0b\u6240\u80fd\u540c\u65f6\u5904\u7406\u7684\u8bf7\u6c42\u603b\u6570\u662f\u7531\u5b50\u8fdb\u7a0b\u603b\u6570\u4e58\u4ee5ThreadsPerChild\u503c\u51b3\u5b9a\u7684\uff0c\u5e94\u8be5\u5927\u4e8e\u7b49\u4e8eMaxClients\u3002\u5982\u679c\u8d1f\u8f7d\u5f88\u5927\uff0c\u73b0\u6709\u7684\u5b50\u8fdb\u7a0b\u6570\u4e0d\u80fd\u6ee1\u8db3\u65f6\uff0c<br \/>\u63a7\u5236\u8fdb\u7a0b\u4f1a\u6d3e\u751f\u65b0\u7684\u5b50\u8fdb\u7a0b\u3002\u9ed8\u8ba4\u6700\u5927\u7684\u5b50\u8fdb\u7a0b\u603b\u6570\u662f16\uff0c\u52a0\u5927\u65f6\u4e5f\u9700\u8981\u663e\u5f0f\u58f0\u660eServerLimit\uff08\u6700\u5927\u503c\u662f20000\uff09\u3002<br \/>\u8fd9\u4e24\u4e2a\u503c\u4f4d\u4e8e\u6e90\u7801\u6811server\/mpm\/worker\/worker.c\u4e2d\u7684\u4ee5\u4e0b\u4e24\u884c\uff1a<br \/>define DEFAULT_SERVER_LIMIT 16 <br \/>define MAX_SERVER_LIMIT 20000<br \/>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u663e\u5f0f\u58f0\u660e\u4e86ServerLimit\uff0c\u90a3\u4e48\u5b83\u4e58\u4ee5ThreadsPerChild\u7684\u503c\u5fc5\u987b\u5927\u4e8e\u7b49\u4e8eMaxClients\uff0c\u800c\u4e14MaxClients\u5fc5\u987b\u662fThreadsPerChild\u7684\u6574\u6570\u500d\uff0c<br \/>\u5426\u5219Apache\u5c06\u4f1a\u81ea\u52a8\u8c03\u8282\u5230\u4e00\u4e2a\u76f8\u5e94\u503c\uff08\u53ef\u80fd\u662f\u4e2a\u975e\u671f\u671b\u503c\uff09\u3002<br \/><br \/><br \/>2010-10-19 13:25:47<br \/><a href=\"http:\/\/1353337.blog.51cto.com\/1343337\/407556\">http:\/\/1353337.blog.51cto.com\/1343337\/407556<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u7ed9\u51fa\u4e86\u4e00\u4e9b\u5177\u4f53\u8bbe\u7f6e\u6570\u503c\u3002\u4f46\u6ca1\u6709\u8003\u8651\u786c\u4ef6\u60c5\u51b5\u3002\u6240\u4ee5\u5177\u4f53\u6570\u503c\u4e0d\u591f\u4e25\u8c28\uff0c\u4ec5\u4f9b\u53c2\u8003\u5404\u9879\u8bbe\u7f6e\u542b\u4e49\u3002\u53e6\u4e00\u7bc7\u6587\u7ae0\u4e2d\uff0c\u7ed9\u51fa &hellip; <a href=\"https:\/\/dingxuan.info\/wp\/?p=395\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">Apache \u7684prefork MPM\u548cworker MPM<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[93,104,103,105],"class_list":["post-395","post","type-post","status-publish","format-standard","hentry","category-network","tag-apache","tag-mpm","tag-prefork","tag-worker"],"_links":{"self":[{"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=\/wp\/v2\/posts\/395","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=395"}],"version-history":[{"count":0,"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=\/wp\/v2\/posts\/395\/revisions"}],"wp:attachment":[{"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dingxuan.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}