{"id":1399,"date":"2008-09-25T10:18:35","date_gmt":"2008-09-25T10:18:35","guid":{"rendered":"http:\/\/www.icocean.com\/blog\/?p=1399"},"modified":"1970-01-01T07:00:00","modified_gmt":"1970-01-01T07:00:00","slug":"apache%E4%B8%ADkeepalive%E9%85%8D%E7%BD%AE%E7%9A%84%E5%90%88%E7%90%86%E4%BD%BF%E7%94%A8","status":"publish","type":"post","link":"https:\/\/www.icocean.com\/blog\/?p=1399","title":{"rendered":"Apache \u4e2d KeepAlive \u914d\u7f6e\u7684\u5408\u7406\u4f7f\u7528"},"content":{"rendered":"

Leftleg's Blog 2007\u5e7409\u670826\u65e5<\/p>\n

\u3000\u3000\u5728 Apache \u670d\u52a1\u5668\u4e2d\uff0cKeepAlive \u662f\u4e00\u4e2a\u5e03\u5c14\u503c\uff0cOn \u4ee3\u8868\u6253\u5f00\uff0cOff \u4ee3\u8868\u5173\u95ed\uff0c\u8fd9\u4e2a\u6307\u4ee4\u5728\u5176\u4ed6\u4f17\u591a\u7684 HTTPD \u670d\u52a1\u5668\u4e2d\u90fd\u662f\u5b58\u5728\u7684\u3002<\/p>\n

\u3000\u3000KeepAlive \u914d\u7f6e\u6307\u4ee4\u51b3\u5b9a\u5f53\u5904\u7406\u5b8c\u7528\u6237\u53d1\u8d77\u7684 HTTP \u8bf7\u6c42\u540e\u662f\u5426\u7acb\u5373\u5173\u95ed TCP \u8fde\u63a5\uff0c\u5982\u679c KeepAlive \u8bbe\u7f6e\u4e3aOn\uff0c\u90a3\u4e48\u7528\u6237\u5b8c\u6210\u4e00\u6b21\u8bbf\u95ee\u540e\uff0c\u4e0d\u4f1a\u7acb\u5373\u65ad\u5f00\u8fde\u63a5\uff0c\u5982\u679c\u8fd8\u6709\u8bf7\u6c42\uff0c\u90a3\u4e48\u4f1a\u7ee7\u7eed\u5728\u8fd9\u4e00\u6b21 TCP \u8fde\u63a5\u4e2d\u5b8c\u6210\uff0c\u800c\u4e0d\u7528\u91cd\u590d\u5efa\u7acb\u65b0\u7684 TCP \u8fde\u63a5\u548c\u5173\u95edTCP \u8fde\u63a5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7528\u6237\u8bbf\u95ee\u901f\u5ea6\u3002<\/p>\n

\u3000\u3000\u90a3\u4e48\u6211\u4eec\u8003\u86513\u79cd\u60c5\u51b5\uff1a
\u3000\u30001\u3002\u7528\u6237\u6d4f\u89c8\u4e00\u4e2a\u7f51\u9875\u65f6\uff0c\u9664\u4e86\u7f51\u9875\u672c\u8eab\u5916\uff0c\u8fd8\u5f15\u7528\u4e86\u591a\u4e2a javascript \u6587\u4ef6\uff0c\u591a\u4e2a css \u6587\u4ef6\uff0c\u591a\u4e2a\u56fe\u7247\u6587\u4ef6\uff0c\u5e76\u4e14\u8fd9\u4e9b\u6587\u4ef6\u90fd\u5728\u540c\u4e00\u4e2a HTTP \u670d\u52a1\u5668\u4e0a\u3002
\u3000\u30002\u3002\u7528\u6237\u6d4f\u89c8\u4e00\u4e2a\u7f51\u9875\u65f6\uff0c\u9664\u4e86\u7f51\u9875\u672c\u8eab\u5916\uff0c\u8fd8\u5f15\u7528\u4e00\u4e2a javascript \u6587\u4ef6\uff0c\u4e00\u4e2a\u56fe\u7247\u6587\u4ef6\u3002
\u3000\u30003\u3002\u7528\u6237\u6d4f\u89c8\u7684\u662f\u4e00\u4e2a\u52a8\u6001\u7f51\u9875\uff0c\u7531\u7a0b\u5e8f\u5373\u65f6\u751f\u6210\u5185\u5bb9\uff0c\u5e76\u4e14\u4e0d\u5f15\u7528\u5176\u4ed6\u5185\u5bb9\u3002<\/p>\n

\u3000\u3000\u5bf9\u4e8e\u4e0a\u97623\u4e2d\u60c5\u51b5\uff0c\u6211\u8ba4\u4e3a\uff1a1 \u6700\u9002\u5408\u6253\u5f00 KeepAlive \uff0c2 \u968f\u610f\uff0c3 \u6700\u9002\u5408\u5173\u95ed KeepAlive<\/p>\n

\u3000\u3000\u4e0b\u9762\u6211\u6765\u5206\u6790\u4e00\u4e0b\u539f\u56e0\u3002<\/p>\n

\u3000\u3000\u5728 Apache \u4e2d\uff0c\u6253\u5f00\u548c\u5173\u95ed KeepAlive \u529f\u80fd\uff0c\u670d\u52a1\u5668\u7aef\u4f1a\u6709\u4ec0\u4e48\u5f02\u540c\u5462\uff1f<\/p>\n

\u3000\u3000\u5148\u770b\u770b\u7406\u8bba\u5206\u6790\u3002<\/p>\n

\u3000\u3000\u6253\u5f00 KeepAlive \u540e\uff0c\u610f\u5473\u7740\u6bcf\u6b21\u7528\u6237\u5b8c\u6210\u5168\u90e8\u8bbf\u95ee\u540e\uff0c\u90fd\u8981\u4fdd\u6301\u4e00\u5b9a\u65f6\u95f4\u540e\u624d\u5173\u95ed\u4f1a\u5173\u95ed TCP \u8fde\u63a5\uff0c\u90a3\u4e48\u5728\u5173\u95ed\u8fde\u63a5\u4e4b\u524d\uff0c\u5fc5\u7136\u4f1a\u6709\u4e00\u4e2aApache \u8fdb\u7a0b\u5bf9\u5e94\u4e8e\u8be5\u7528\u6237\u800c\u4e0d\u80fd\u5904\u7406\u5176\u4ed6\u7528\u6237\uff0c\u5047\u8bbe KeepAlive \u7684\u8d85\u65f6\u65f6\u95f4\u4e3a 10 \u79d2\u79cd\uff0c\u670d\u52a1\u5668\u6bcf\u79d2\u5904\u7406 50\u4e2a\u72ec\u7acb\u7528\u6237\u8bbf\u95ee\uff0c\u90a3\u4e48\u7cfb\u7edf\u4e2d Apache \u7684\u603b\u8fdb\u7a0b\u6570\u5c31\u662f 10 * 50 \uff1d 500 \u4e2a\uff0c\u5982\u679c\u4e00\u4e2a\u8fdb\u7a0b\u5360\u7528 4M \u5185\u5b58\uff0c\u90a3\u4e48\u603b\u5171\u4f1a\u6d88\u8017 2G\u5185\u5b58\uff0c\u6240\u4ee5\u53ef\u4ee5\u770b\u51fa\uff0c\u5728\u8fd9\u79cd\u914d\u7f6e\u4e2d\uff0c\u76f8\u5f53\u6d88\u8017\u5185\u5b58\uff0c\u4f46\u597d\u5904\u662f\u7cfb\u7edf\u53ea\u5904\u7406\u4e86 50\u6b21 TCP \u7684\u63e1\u624b\u548c\u5173\u95ed\u64cd\u4f5c\u3002<\/p>\n

\u3000\u3000\u5982\u679c\u5173\u95ed KeepAlive\uff0c\u5982\u679c\u8fd8\u662f\u6bcf\u79d250\u4e2a\u7528\u6237\u8bbf\u95ee\uff0c\u5982\u679c\u7528\u6237\u6bcf\u6b21\u8fde\u7eed\u7684\u8bf7\u6c42\u6570\u4e3a3\u4e2a\uff0c\u90a3\u4e48 Apache \u7684\u603b\u8fdb\u7a0b\u6570\u5c31\u662f 50 * 3= 150 \u4e2a\uff0c\u5982\u679c\u8fd8\u662f\u6bcf\u4e2a\u8fdb\u7a0b\u5360\u7528 4M \u5185\u5b58\uff0c\u90a3\u4e48\u603b\u7684\u5185\u5b58\u6d88\u8017\u4e3a 600M\uff0c\u8fd9\u79cd\u914d\u7f6e\u80fd\u8282\u7701\u5927\u91cf\u5185\u5b58\uff0c\u4f46\u662f\uff0c\u7cfb\u7edf\u5904\u7406\u4e86 150 \u6b21 TCP\u7684\u63e1\u624b\u548c\u5173\u95ed\u7684\u64cd\u4f5c\uff0c\u56e0\u6b64\u53c8\u4f1a\u591a\u6d88\u8017\u4e00\u4e9b CPU \u8d44\u6e90\u3002<\/p>\n

\u3000\u3000\u5728\u770b\u770b\u5b9e\u8df5\u7684\u89c2\u5bdf\u3002<\/p>\n

\u3000\u3000\u6211\u5728\u4e00\u7ec4\u5927\u91cf\u5904\u7406\u52a8\u6001\u7f51\u9875\u5185\u5bb9\u7684\u670d\u52a1\u5668\u4e2d\uff0c\u8d77\u521d\u6253\u5f00 KeepAlive\u529f\u80fd\uff0c\u7ecf\u5e38\u89c2\u5bdf\u5230\u7528\u6237\u8bbf\u95ee\u91cf\u5927\u65f6Apache\u8fdb\u7a0b\u6570\u4e5f\u975e\u5e38\u591a\uff0c\u7cfb\u7edf\u9891\u7e41\u4f7f\u7528\u4ea4\u6362\u5185\u5b58\uff0c\u7cfb\u7edf\u4e0d\u7a33\u5b9a\uff0c\u6709\u65f6\u8d1f\u8f7d\u4f1a\u51fa\u73b0\u8f83\u5927\u6ce2\u52a8\u3002\u5173\u95ed\u4e86 KeepAlive\u529f\u80fd\u540e\uff0c\u770b\u5230\u660e\u663e\u7684\u53d8\u5316\u662f\uff1a Apache \u7684\u8fdb\u7a0b\u6570\u51cf\u5c11\u4e86\uff0c\u7a7a\u95f2\u5185\u5b58\u589e\u52a0\u4e86\uff0c\u7528\u4e8e\u6587\u4ef6\u7cfb\u7edfCache\u7684\u5185\u5b58\u4e5f\u589e\u52a0\u4e86\uff0cCPU\u7684\u5f00\u9500\u589e\u52a0\u4e86\uff0c\u4f46\u662f\u670d\u52a1\u66f4\u7a33\u5b9a\u4e86\uff0c\u7cfb\u7edf\u8d1f\u8f7d\u4e5f\u6bd4\u8f83\u7a33\u5b9a\uff0c\u5f88\u5c11\u6709\u8d1f\u8f7d\u5927\u8303\u56f4\u6ce2\u52a8\u7684\u60c5\u51b5\uff0c\u8d1f\u8f7d\u6709\u4e00\u5b9a\u7a0b\u5ea6\u7684\u964d\u4f4e\uff1b\u53d8\u5316\u4e0d\u660e\u663e\u7684\u662f\uff1a\u8bbf\u95ee\u91cf\u8f83\u5c11\u7684\u65f6\u5019\uff0c\u7cfb\u7edf\u5e73\u5747\u8d1f\u8f7d\u6ca1\u6709\u660e\u663e\u53d8\u5316\u3002<\/p>\n

\u3000\u3000\u603b\u7ed3\u4e00\u4e0b\uff1a
\u3000\u3000\u5728\u5185\u5b58\u975e\u5e38\u5145\u8db3\u7684\u670d\u52a1\u5668\u4e0a\uff0c\u4e0d\u7ba1\u662f\u5426\u5173\u95ed KeepAlive \u529f\u80fd\uff0c\u670d\u52a1\u5668\u6027\u80fd\u4e0d\u4f1a\u6709\u660e\u663e\u53d8\u5316\uff1b
\u3000\u3000\u5982\u679c\u670d\u52a1\u5668\u5185\u5b58\u8f83\u5c11\uff0c\u6216\u8005\u670d\u52a1\u5668\u6709\u975e\u5e38\u5927\u91cf\u7684\u6587\u4ef6\u7cfb\u7edf\u8bbf\u95ee\u65f6\uff0c\u6216\u8005\u4e3b\u8981\u5904\u7406\u52a8\u6001\u7f51\u9875\u670d\u52a1\uff0c\u5173\u95ed KeepAlive \u540e\u53ef\u4ee5\u8282\u7701\u5f88\u591a\u5185\u5b58\uff0c\u800c\u8282\u7701\u51fa\u6765\u7684\u5185\u5b58\u7528\u4e8e\u6587\u4ef6\u7cfb\u7edfCache\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6587\u4ef6\u7cfb\u7edf\u8bbf\u95ee\u7684\u6027\u80fd\uff0c\u5e76\u4e14\u7cfb\u7edf\u4f1a\u66f4\u52a0\u7a33\u5b9a\u3002<\/p>\n

\u3000\u3000\u8865\u51451\uff1a
\u3000\u3000\u5173\u4e8e\u662f\u5426\u5e94\u8be5\u5173\u95ed KeepAlive \u9009\u9879\uff0c\u6211\u89c9\u5f97\u53ef\u4ee5\u57fa\u4e8e\u4e0b\u9762\u7684\u4e00\u4e2a\u516c\u5f0f\u6765\u5224\u65ad\u3002<\/p>\n

\u3000\u3000\u5728\u7406\u60f3\u7684\u7f51\u7edc\u8fde\u63a5\u72b6\u51b5\u4e0b\uff0c\u7cfb\u7edf\u7684 Apache \u8fdb\u7a0b\u6570\u548c\u5185\u5b58\u4f7f\u7528\u53ef\u4ee5\u7528\u5982\u4e0b\u516c\u5f0f\u8868\u8fbe\uff1a
HttpdProcessNumber = KeepAliveTimeout * TotalRequestPerSecond \/ Average(KeepAliveRequests)
HttpdUsedMemory = HttpdProcessNumber * MemoryPerHttpdProcess<\/p>\n

\u3000\u3000\u6362\u6210\u4e2d\u6587\uff1a
\u603bApache\u8fdb\u7a0b\u6570 = KeepAliveTimeout * \u6bcf\u79d2\u79cdHTTP\u8bf7\u6c42\u6570 \/ \u5e73\u5747KeepAlive\u8bf7\u6c42
Apache\u5360\u7528\u5185\u5b58 = \u603bApache\u8fdb\u7a0b\u6570 * \u5e73\u5747\u6bcf\u8fdb\u7a0b\u5360\u7528\u5185\u5b58\u6570<\/p>\n

\u3000\u3000\u9700\u8981\u7279\u522b\u8bf4\u660e\u7684\u662f\uff1a
\u3000\u3000[\u5e73\u5747KeepAlive\u8bf7\u6c42] \u6570\uff0c\u662f\u6307\u6bcf\u4e2a\u7528\u6237\u8fde\u63a5\u4e0a\u670d\u52a1\u5668\u540e\uff0c\u6301\u7eed\u53d1\u51fa\u7684 HTTP \u8bf7\u6c42\u6570\u3002\u5f53 KeepAliveTimeout \u7b49 0\u6216\u8005 KeepAlive \u5173\u95ed\u65f6\uff0cKeepAliveTimeout \u4e0d\u53c2\u4e0e\u4e58\u7684\u8fd0\u7b97\u4ece\u4e0a\u9762\u7684\u516c\u5f0f\u770b\uff0c\u5982\u679c [\u6bcf\u79d2\u7528\u6237\u8bf7\u6c42]\u591a\uff0c[KeepAliveTimeout] \u7684\u503c\u5927\uff0c[\u5e73\u5747KeepAlive\u8bf7\u6c42] \u7684\u503c\u5c0f\uff0c\u90fd\u4f1a\u9020\u6210 [Apache\u8fdb\u7a0b\u6570] \u591a\u548c [\u5185\u5b58]\u591a\uff0c\u4f46\u662f\u5f53 [\u5e73\u5747KeepAlive\u8bf7\u6c42] \u7684\u503c\u8d8a\u5927\u65f6\uff0c[Apache\u8fdb\u7a0b\u6570] \u548c [\u5185\u5b58] \u90fd\u662f\u8d8b\u5411\u4e8e\u51cf\u5c11\u7684\u3002<\/p>\n

\u3000\u3000\u57fa\u4e8e\u4e0a\u9762\u7684\u516c\u5f0f\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u63a8\u7b97\u51fa\u5f53 \u5e73\u5747KeepAlive\u8bf7\u6c42 <= KeepAliveTimeout \u65f6\uff0c\u5173\u95ed KeepAlive \u9009\u9879\u662f\u5212\u7b97\u7684\uff0c\u5426\u5219\u5c31\u53ef\u4ee5\u8003\u8651\u6253\u5f00\u3002\n\n     \u8865\u51452:  KeepAlive \u8be5\u53c2\u6570\u63a7\u5236Apache\u662f\u5426\u5141\u8bb8\u5728\u4e00\u4e2a\u8fde\u63a5\u4e2d\u6709\u591a\u4e2a\u8bf7\u6c42\uff0c\u9ed8\u8ba4\u6253\u5f00\u3002\u4f46\u5bf9\u4e8e\u5927\u591a\u6570\u8bba\u575b\u7c7b\u578b\u7ad9\u70b9\u6765\u8bf4\uff0c\u901a\u5e38\u8bbe\u7f6e\u4e3aoff\u4ee5\u5173\u95ed\u8be5\u652f\u6301\u3002 \n\n     \u8865\u51453:  \u5982\u679c\u670d\u52a1\u5668\u524d\u8dd1\u6709\u5e94\u7528squid\u670d\u52a1\uff0c\u6216\u8005\u5176\u5b83\u4e03\u5c42\u8bbe\u5907,KeepAlive On \u8bbe\u5b9a\u8981\u5f00\u542f\u6301\u7eed\u957f\u8fde\u63a5\n\n\u5b9e\u9645\u5728 \u524d\u7aef\u6709 squid \u7684\u60c5\u51b5\u4e0b, KeepAlive \u5f88\u5173\u952e\u3002\u8bb0\u5f97 On<\/p>\n","protected":false},"excerpt":{"rendered":"

Leftleg's Blog 2007\u5e7409\u670826\u65e5 \u3000\u3000\u5728 Apache \u670d\u52a1\u5668\u4e2d\uff0cKeepAliv […]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[638,1938],"class_list":["post-1399","post","type-post","status-publish","format-standard","hentry","category-lamp","tag-apache","tag-keepalive","category-24-id","post-seq-1","post-parity-odd","meta-position-corners","fix"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1399","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1399"}],"version-history":[{"count":0,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1399\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1399"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1399"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}