{"id":434445,"date":"2021-04-18T17:49:03","date_gmt":"2021-04-18T09:49:03","guid":{"rendered":"http:\/\/4563.org\/?p=434445"},"modified":"2021-04-18T17:49:03","modified_gmt":"2021-04-18T09:49:03","slug":"apache-httpd-%e5%bc%95%e5%8f%91%e7%9a%84%e4%b8%a2%e5%8c%85%e9%97%ae%e9%a2%98%e6%b1%82%e8%a7%a3","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=434445","title":{"rendered":"Apache httpd \u5f15\u53d1\u7684\u4e22\u5305\u95ee\u9898\u6c42\u89e3"},"content":{"rendered":"
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Apache httpd \u5f15\u53d1\u7684\u4e22\u5305\u95ee\u9898\u6c42\u89e3 <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/i> 7<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u6628\u5929\u5de1\u68c0\u7684\u65f6\u5019\u770b apache \u76d1\u63a7\u89c6\u56fe(open-falcon)\u53d1\u73b0\u67d0\u53f0 apache \u7684\u7f51\u5361\u6d41\u91cf\u548c\u8fde\u63a5\u6570\u4ece\u524d\u5929\u665a\u4e0a\u7a81\u7136\u964d\u5230\u975e\u5e38\u4f4e\uff0c\u6ca1\u6765\u5f97\u53ca\u4fdd\u7559\u73b0\u573a\u8d76\u7d27\u91cd\u542f apache \u540e\u6062\u590d\u3002\u6392\u67e5\u4e86\u8be5\u673a\u5668 CPU \u5185\u5b58\u90fd\u6ca1\u4ec0\u4e48\u95ee\u9898\uff0capache \u65e5\u5fd7\u5e76\u6ca1\u6709\u5f02\u5e38\uff0c\u5185\u6838\u65e5\u5fd7\u65e0\u5f02\u5e38\uff0c\u540e\u6765\u770b\u4e86\u770b TCP \u7684\u76d1\u63a7\uff0c\u53d1\u73b0\u51fa\u95ee\u9898\u7684\u65f6\u5019\uff0c\u6709\u5f88\u591a TCPLISTENOVERFLOW \u7684\u62a5\u9519\uff0c\u67e5\u4e86\u4e00\u4e0b\u53ef\u80fd\u548c Backlog \u548c somaxconn \u7b49\u53c2\u6570\u6709\u4e9b\u5173\u7cfb\uff0c\u540e\u6765\u6211\u67e5\u4e86\u4e00\u4e0b\u8fd9\u53f0\u673a\u5668\u7684\u8fd9\u4e9b\u914d\u7f6e\u548c\u5176\u4ed6\u673a\u5668\u6709\u65e0\u5dee\u522b\uff0c\u4e5f\u6ca1\u53d1\u73b0\u6709\u5565\u95ee\u9898\u3002\u4e0d\u77e5\u9053\u5927\u5bb6\u6709\u5565\u6392\u67e5\u601d\u8def\uff1f<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (4<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : liuxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    TCPLISTENOVERFLOW \u7684\u95ee\u9898\u5728\u4e8e backlog \u7684\u961f\u5217\u6ee1\u4e86\u6ca1\u80fd\u53ca\u65f6\u6d88\u8d39\u6389\uff0c\u6240\u4ee5 tcp \u534f\u8bae\u6808\u4f1a\u505c\u6b62\u63a5\u6536\u65b0\u8fde\u63a5\uff08\u4e0d\u8fd4\u56de\u4efb\u4f55 tcp \u5305\uff0c\u800c\u662f\u670d\u52a1\u7aef\u8fc7\u4e00\u4f1a\u8fd4\u56de syn ack \u88c5\u50bb\u544a\u8bc9\u5ba2\u6237\u7aef\u6ca1\u6536\u5230 ack\uff0c\u5ba2\u6237\u7aef\u4f1a\u91cd\u53d1 ack \u5efa\u7acb\u8fde\u63a5\uff09\uff0c\u5f15\u53d1\u8fd9\u4e2a\u95ee\u9898\u5728\u4e8e\u4e3a\u4ec0\u4e48\u4f60\u7684 apache \u7684 accept()\u6ca1\u6709\u5feb\u901f\u6d88\u8d39\u6389 backlog \u7684\u961f\u5217<\/p>\n

    \u4f60\u5f53\u65f6\u7684\u60c5\u51b5\u5e94\u8be5\u662f ESTABLISHED \u7684\u8fde\u63a5\u662f\u6ee1\u7684\uff0c\u53ea\u662f\u65b0\u8fde\u63a5\u5efa\u7acb\u4e0d\u8d77\u6765<\/p>\n

    \u6d41\u91cf\u975e\u5e38\u4f4e\uff0c\u662f\u56e0\u4e3a\u670d\u52a1\u7aef\u91cd\u590d\u8fd4\u56de syn ack\uff0c\u88c5\u6210\u6ca1\u6536\u5230\u5ba2\u6237\u7aef\u7684 ack\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u5ba2\u6237\u7aef\u6839\u636e\u95f4\u9694\u65f6\u95f4\u6307\u6570\u589e\u52a0\u7684\u65b9\u5f0f\u91cd\u590d\u53d1\u9001 ack\/psh ack \u4e1a\u52a1\u6570\u636e\u5305\uff0c\u6240\u4ee5\u6ca1\u6709\u6b63\u5e38\u7684\u5165\u7f51\u6d41\u91cf\uff0c\u51fa\u7f51\u6d41\u91cf\u4f1a\u6839\u636e\u4f60\u7684\u4e1a\u52a1\u60c5\u51b5\uff0c\u5982\u679c\u4e0d\u662f\u4e0b\u8f7d\u548c\u63a8\u9001\u6570\u636e\u7c7b\uff0c\u7531\u4e8e ESTABLISHED \u7684\u8fde\u63a5\u6ca1\u80fd\u53ca\u65f6\u5904\u7406\uff0c\u4e5f\u5c31\u6ca1\u6709\u4ec0\u4e48\u51fa\u7f51\u6570\u636e\u5305\u4e86\uff0c\u6240\u4ee5\u51fa\u7f51\u6d41\u91cf\u4e5f\u4f1a\u5f88\u4f4e<\/p>\n

    \u91cd\u542f\u4e00\u4e0b\u5c31\u80fd\u597d\u7684\u5f88\u96be\u4e8b\u540e\u5206\u6790\uff0c\u81ea\u5df1\u770b\u770b\u4f60\u7684\u4e1a\u52a1\u903b\u8f91\u548c\u4ee3\u7801\u5427 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
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    \u8cc7\u6df1\u5927\u4f6c : liuxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5176\u5b9e\u6ca1\u6709\u4e1a\u52a1\u573a\u666f\u7684\u8bdd\u6211\u80fd\u5047\u8bbe\u4e00\u79cd\u60c5\u51b5\uff0c\u4f60\u524d\u9762\u6709\u8d1f\u8f7d\u5747\u8861 lb\uff0c\u540e\u9762 3 \u53f0\u670d\u52a1\u5668 abc\uff0c\u5047\u8bbe\u67d0\u79cd\u539f\u56e0\uff0cab \u670d\u52a1\u5668\u5f53\u673a\u51e0\u5206\u949f\u540e\u6b63\u5e38\uff0c\u5bfc\u81f4 lb \u5c06\u6d41\u91cf\u5168\u90e8\u7ed9\u4e86\u670d\u52a1\u5668 c\uff0c\u670d\u52a1\u5668 c \u8fde\u63a5\u592a\u591a\uff0c\u5f53\u4f60\u91cd\u542f c \u540e\uff0clb \u6709\u5747\u5206\u7ed9 3 \u53f0\u670d\u52a1\u5668\u4e86\uff0c\u6240\u4ee5\u5c31\u51fa\u73b0\u4e86\u4f60\u8fd9\u79cd\u60c5\u51b5 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @liuxu \u5341\u5206\u611f\u8c22\uff01\u60a8\u7684\u610f\u601d\u662f\u53ef\u80fd\u662f lb \u7684\u95ee\u9898\uff1f lb \u662f\u786c\u4ef6\u7684 lb\uff0c\u7528\u4e86\u597d\u51e0\u5e74\u4e86\u90fd\u633a\u7a33\u7684\uff0c\u4e0d\u8fc7\u4e5f\u4e0d\u6392\u9664 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : liuxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zhoudaiyu \u6ca1\u6709\u5f53\u65f6\u60c5\u51b5\u7684\u5177\u4f53\u5206\u6790\uff0c\u5f88\u96be\u8bf4\u662f\u4ec0\u4e48\u95ee\u9898 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    Apache httpd \u5f15\u53d1\u7684\u4e22…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/434445"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=434445"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/434445\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=434445"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=434445"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=434445"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}