{"id":36547,"date":"2023-01-18T04:49:18","date_gmt":"2023-11-17T01:08:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/apache%e7%9a%84maxclients%e7%9a%84%e9%80%82%e5%bd%93%e5%80%bc%e6%98%af%e5%a4%9a%e5%b0%91%ef%bc%9f\/"},"modified":"2024-04-29T10:20:01","modified_gmt":"2024-04-29T02:20:01","slug":"apache%e7%9a%84maxclients%e7%9a%84%e9%80%82%e5%bd%93%e5%80%bc%e6%98%af%e5%a4%9a%e5%b0%91%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/apache%e7%9a%84maxclients%e7%9a%84%e9%80%82%e5%bd%93%e5%80%bc%e6%98%af%e5%a4%9a%e5%b0%91%ef%bc%9f\/","title":{"rendered":"Apache\u7684MaxClients\u7684\u9002\u5f53\u503c\u662f\u591a\u5c11\uff1f"},"content":{"rendered":"

\u5173\u4e8eMaxClients\u548cMaxRequestWorkers\u7684\u63d0\u53ca<\/h2>\n

\u8bf7\u6309\u65f6\u95f4\u987a\u5e8f\u603b\u7ed3\u6709\u5173 Apache \u7684 MaxClients \/ MaxRequestWorkers \u9002\u5f53\u503c\u7684\u8a00\u53ca\u3002\u656c\u79f0\u7565\u3002
\n\u5982\u679c\u8fd8\u6709\u5176\u4ed6\u91cd\u8981\u7684\u7f51\u9875\u63d0\u5230\uff0c\u8bf7\u544a\u77e5\u3002<\/p>\n

2002\/07\/23 \u4e00\u5fd7\u9054\u4e5f\uff08TIS\u682a\u5f0f\u4f1a\u793e\uff09:<\/h3>\n

2002\u5e747\u670823\u65e5\uff0c\u4e00\u5fd7\u9054\u4e5f\uff08TIS\u682a\u5f0f\u4f1a\u793e\uff09\u3002<\/p>\n

Apache\u901a\u8fc7\u6784\u5efaWeb\u670d\u52a1\u5668\uff0816\uff09\uff1aApache\u6027\u80fd\u8c03\u4f18\u5b9e\u8df5\uff082\/2\uff09- \uff20IT<\/p>\n

\u7528\u4e8e\u9650\u5236\u8fdb\u7a0b\u6570\u7684\u6307\u4ee4\u662f”MaxClients”\u3002\u8be5\u6307\u4ee4\u7528\u4e8e\u6307\u5b9a\u540c\u65f6\u53ef\u4ee5\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\uff08\u4e25\u683c\u6765\u8bf4\u662f\u4f1a\u8bdd\uff09\u7684\u6570\u91cf\u3002
\n…\u7701\u7565…
\n\u901a\u8fc7\u589e\u52a0\u540c\u65f6\u8fde\u63a5\u6570\u6765\u8c03\u67e5CPU\u3001\u5185\u5b58\u72b6\u6001\u4ee5\u53caab\u663e\u793a\u7684\u6027\u80fd\u53d8\u5316\u3002\u4e0e\u6b64\u540c\u65f6\uff0c\u6211\u4eec\u8fd8\u5c06\u9010\u6e10\u589e\u52a0MaxClients\u7684\u503c\uff0c\u4ee5\u627e\u5230\u9971\u548c\u70b9\u3002<\/p><\/blockquote>\n

\u8fd9\u7bc7\u6587\u7ae0\u662f\u5728\u6ca1\u6709\u5f15\u7528\u53c2\u8003\u8d44\u6599\u7684\u60c5\u51b5\u4e0b\u9996\u6b21\u63d0\u5230 MaxClients \u7684\u5408\u9002\u503c\u3002\u867d\u7136\u8fd8\u6ca1\u6709\u7ed9\u51fa\u5177\u4f53\u7684\u6807\u51c6\uff0c\u4f46\u63d0\u53ca\u4e86\u5982\u4f55\u5bfb\u627e\u5408\u9002\u503c\u7684\u65b9\u6cd5\u3002<\/p>\n

2003\u5e745\u670823\u65e5\uff0c\u57c3\u91cc\u514b\u00b7\u4e54\u83b1\u548c\u65af\u5854\u65af\u00b7\u8d1d\u514b\u66fc\u3002<\/h3>\n

\u5b9e\u7528\u7684mod_perl: 10.1.1. \u8ba1\u7b97\u771f\u5b9e\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<\/p>\n

\"\"<\/div>\n

\u5177\u4f53\u4ecb\u3063\u7ec6\u5206\u6790\u4e86\u8ba1\u7b97\u6700\u5927\u5b50\u8fdb\u7a0b\u6570\u91cf\u7684\u65b9\u6cd5\u3002<\/p>\n

2003\u5e7410\u670818\u65e5\uff0c\u7af9\u8feb\u826f\u7bc4\uff08\u682a\u5f0f\u4f1a\u793e\u30c9\u30ea\u30fc\u30e0\u30fb\u30a2\u30fc\u30c4\uff09<\/h3>\n

\u300cmod_perl \u5728 C10K \u95ee\u9898\u4e2d\u7684\u5e94\u7528\u300dShibuya.pm \u6280\u672f\u8bb2\u5ea7#4 \u203bppt \u6587\u4ef6<\/p>\n

\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n

\u5728\u300a\u5b9e\u7528mod_perl\u300b\u4e00\u4e66\u4e2d\uff0c\u6240\u8ff0\u7684\u5185\u5bb9\u5df2\u7ecf\u88ab\u5f62\u8c61\u5316\u4e86\u3002<\/p>\n

2003\u5e7412\u67085\u65e5\uff0c\u5bae\u5185\u306f\u3058\u3081\u81f3\u4e0a\u4e00\u79cd\u9009\u9879\u3002<\/h3>\n

\u5bfb\u627e\u8ba1\u7b97\u673a\u76f8\u5173\u5907\u5fd8\u5f55 – \u6c42\u89e3 MaxClients \u7684\u9002\u5f53\u503c \/ \u9002\u7528\u4e8e\u56fe\u50cf\uff08\u9759\u6001\u5185\u5bb9\uff09\u7684\u670d\u52a1\u5668<\/p>\n

Apache\u7684\u6700\u5927\u5185\u5b58\u6d88\u8017\u91cf=MaxClients\u00d7\u5b50\u8fdb\u7a0b\u7684\u5185\u5b58\u6d88\u8017\u91cf+\u7236\u8fdb\u7a0b\u7684\u5185\u5b58\u6d88\u8017\u91cf<\/p>\n

\u6240\u4ee5\u9996\u5148\u9700\u8981\u6c42\u5f97”\u5b50\u8fdb\u7a0b\u7684\u5185\u5b58\u6d88\u8017\u91cf”\u548c”\u7236\u8fdb\u7a0b\u7684\u5185\u5b58\u6d88\u8017\u91cf”\u3002<\/p>\n

httpd\u7684SIZE\u5373\u4e3a”\u7236\u8fdb\u7a0b\u7684\u5185\u5b58\u6d88\u8017\u91cf”\uff0cSIZE – SHARE\uff08\u4e0e\u7236\u8fdb\u7a0b\u5171\u4eab\u7684\u90e8\u5206\uff09\u5373\u4e3a”\u5b50\u8fdb\u7a0b\u7684\u5185\u5b58\u6d88\u8017\u91cf”\u3002<\/p><\/blockquote>\n

\u7528\u65e5\u8bed\u5c55\u793a\u4e86\u8ba1\u7b97\u516c\u5f0f\u3002<\/p>\n

2006\u5e742\u67081\u65e5\uff0c\u3070\u3073\u30fc (ID: babie)<\/h3>\n

Apache + mod_perl – \u9700\u8981\u6ce8\u610fMaxClients\u7684\u503c – \u5c0f\u6b65\u524d\u8fdb<\/p>\n

MaxClients \u5e94\u8bbe\u4e3a”\u603b\u5185\u5b58\u5927\u5c0f \/ Apache \u5b50\u8fdb\u7a0b\u5355\u4e2a\u5185\u5b58\u5927\u5c0f”\uff08\u8fdb\u884c\u820d\u5165\u8fd0\u7b97\uff09\u3002<\/p>\n

\u5728\u5e7b\u706f\u7247\u4e2d\u63d0\u5230\u7684 Apache \u7684 Shared_RAM_per_Child\uff08\u5b50\u8fdb\u7a0b\u7684\u5171\u4eab\u5185\u5b58\u91cf\uff09\u662f\u5982\u4f55\u83b7\u5f97\u7684\u5462\uff1f<\/p>\n

Shared RAM per Child \u53ef\u4ee5\u901a\u8fc7 RSS – SHARE \u6765\u51c6\u786e\u83b7\u53d6\u3002\u5982\u679c\u60f3\u8981\u786e\u5207\u5730\u77e5\u9053\u8be5\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 GTop\u3002<\/p><\/blockquote>\n

\u7ecf\u8fc7\u4e00\u6bb5\u65f6\u95f4\u540e\uff0c\u518d\u6b21\u51fa\u73b0\u4e86\u5bf9\u4e8eMaxClients\u7684\u8ba8\u8bba\u7684\u5951\u673a\u3002naoya\u5728\u8bc4\u8bba\u4e2d\u63d0\u5230\u4e86\u5173\u4e8eGTop\u8fd9\u4e2a\u8bdd\u9898\u3002<\/p>\n

2006\u5e742\u67082\u65e5\uff0c\u9ad8\u91ce\u6c60\u3002<\/h3>\n

\u5728\/proc\/$pid\/smaps\u4e2d\u53ef\u4ee5\u83b7\u53d6\u5230\u5171\u4eab\u7684\u5185\u5b58\u533a\u57df\u3002
\n\u00b7 \u5728fork\u4e4b\u524d\u5206\u914d\u7684\u5185\u5b58\u533a\u57df\u5c06\u4f1a\u662f\u5171\u4eab\u7684\uff0c\u53d8\u4e3ashared_dirty\u3002
\n\u00b7 \u5728fork\u4e4b\u540e\u5bf9\u8be5\u533a\u57df\u8fdb\u884c\u5199\u5165\u64cd\u4f5c\u65f6\uff0c\u4f1a\u88ab\u590d\u5236\uff0c\u53d8\u4e3aprivate_dirty\u3002
\n\u00b7 \u5728fork\u4e4b\u540e\u5206\u914d\u7684\u533a\u57df\u4e0d\u4f1a\u88ab\u5171\u4eab\uff08\u7406\u6240\u5f53\u7136\uff09\uff0c\u4e0d\u4f1a\u6210\u4e3ashared\/private\uff08\u53ef\u80fd\uff09\u3002
\n\u5f53\u5904\u4e8eshared\u72b6\u6001\u65f6\uff0c\u5b9e\u9645\u7684\u5185\u5b58\u4e0d\u4f1a\u88ab\u6d88\u8017\uff0c\u5f53\u53d8\u4e3aprivate\u65f6\u4f1a\u91cd\u65b0\u5206\u914d\u3002<\/p><\/blockquote>\n

\u63d0\u5230\u53ef\u4ee5\u5728\/proc\/$pid\/smaps\u4e2d\u83b7\u53d6\u5230\u5171\u4eab\u5185\u5b58\u3002<\/p>\n

\u8ba1\u7b97\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u6d88\u8017\u7684\u5185\u5b58\u91cf\u4e3a\u201cMax_Process_Size – Shared_RAM_per_Child\u201d\u3002<\/p><\/blockquote>\n

2007\u5e747\u67088\u65e5\uff0c\u690e\u540d\u6df3\u8f14\uff08\u60a0\u6708\uff09\u3002<\/h3>\n

MaxClients\u7684\u503c = \uff08\u670d\u52a1\u5668\u603bRAM\u91cf – \u7236Apache\u8fdb\u7a0b\u6d88\u8017\u7684\u5185\u5b58\u91cf\uff09\/ \u5b50Apache\u8fdb\u7a0b\u4e00\u4e2a\u7684\u6d88\u8017\u5185\u5b58\u91cf<\/p>\n

\u540c\u65f6\u8fd8\u5e94\u6ee1\u8db3\u4ee5\u4e0b\u8ba1\u7b97\u5f0f\u3002<\/p>\n

\u5b50Apache\u8fdb\u7a0b\u4e00\u4e2a\u7684\u6d88\u8017\u5185\u5b58\u91cf x MaxClients\u7684\u503c + \u7236Apache\u8fdb\u7a0b\u6d88\u8017\u5185\u5b58\u91cf < \u670d\u52a1\u5668\u603bRAM\u91cf<\/p><\/blockquote>\n

2007\u5e7410\u670824\u65e5\uff0cMoodle\u3002<\/h3>\n

\u8868\u6f14 – MoodleDocs \u203b\u65e5\u671f\u6839\u636e\u539f\u59cb\u82f1\u6587\u7248\u672c<\/p>\n

\u8bf7\u6b63\u786e\u8bbe\u7f6eMaxClients\u6307\u4ee4\u3002\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97\u8bbe\u7f6e\u503c\uff08\u4e3a\u4e86\u4fdd\u7559\u5907\u7528\u5185\u5b58\u7a7a\u95f4\uff0c\u4f7f\u7528\u53ef\u7528\u5185\u5b58\u768480\uff05\uff09\uff1a<\/p>\n

MaxClients = \u53ef\u7528\u603b\u5185\u5b58 * 80% \/ Apache\u8fdb\u7a0b\u7684\u6700\u5927\u5185\u5b58\u4f7f\u7528\u91cf<\/p>\n

Apache\u8fdb\u7a0b\u7684\u5185\u5b58\u4f7f\u7528\u91cf\u901a\u5e38\u4e3a10MB\u3002\u4e00\u822c\u7ecf\u9a8c\u6cd5\u5219\u662f\uff0c\u4e3a\u4e86\u83b7\u53d6MaxClients\u7684\u503c\uff0c\u5c06\u53ef\u7528\u5185\u5b58\u5bb9\u91cf\u9664\u4ee510MB\u3002\u8981\u627e\u5230Apache\u8fdb\u7a0b\u7684\u6700\u5927\u5185\u5b58\u4f7f\u7528\u91cf\uff0c\u8bf7\u4eceshell\u547d\u4ee4\u7684\u7ed3\u679c\u4e2d\u8bfb\u53d6\u503c\uff1a<\/p>\n

# ps -ylC httpd –sort:rss<\/p><\/blockquote>\n

\u4f5c\u4e3a\u7ecf\u9a8c\u51c6\u5219\uff0c\u5bf9\u4e8e\u8ba1\u7b97 MaxClients \u5408\u9002\u503c\u7684\u5206\u5b50\u90e8\u5206\uff0c\u5efa\u8bae\u4f7f\u7528\u201c\u53ef\u7528\u5185\u5b58\u768480%\u201d\u3002
\n\u6b64\u5916\uff0c\u8fd8\u63d0\u4f9b\u4e86\u7528\u4e8e\u786e\u5b9a Apache \u8fdb\u7a0b\u7684\u6700\u5927\u5185\u5b58\u4f7f\u7528\u91cf\u7684\u547d\u4ee4\u3002<\/p>\n

2008\u5e742\u670812\u65e5\uff0c\u4f0a\u85e4\u76f4\u4e5f\uff08id:naoya\uff09\u3002<\/h3>\n

\u901a\u8fc7 Copy on Write \u6280\u672f\u5171\u4eab\u7684\u5185\u5b58\u5927\u5c0f\u53ef\u4ee5\u901a\u8fc7\u68c0\u67e5 Linux \u8fdb\u7a0b\u6765\u83b7\u53d6 – naoya\u7684\u306f\u3066\u306a\u65e5\u8bb0<\/p>\n

\u5982\u679c\u4ee5mod_perl\u4e3a\u4f8b\uff0c\u9700\u8981\u8003\u8651\u5728MaxClients\u8bbe\u7f6e\u4e2d\u8003\u8651\u5171\u4eab\u7a7a\u95f4\u7684\u5927\u5c0f\u3002<\/p>\n

\u6211\u5c1d\u8bd5\u67e5\u627e\u5728\u8fdb\u7a0b\u7684\u5185\u5b58\u7a7a\u95f4\u4e2d\u6709\u591a\u5c11\u91c7\u7528\u5199\u65f6\u590d\u5236\uff08CoW\uff09\u7684\u5171\u4eab\u533a\u57df\uff0c\u5e76\u4e14\u6211\u53d1\u73b0\u53ef\u4ee5\u901a\u8fc7\u68c0\u67e5\/proc\/PID\/smaps\u6765\u5b9e\u73b0\u3002<\/p>\n

\u5728\u8fd9\u4e2asmaps\u4e2d\uff0c\u53ef\u4ee5\u5c06\u6bcf\u4e2a\u533a\u57df\u7684\u5927\u5c0f\u8ba1\u7b97\u51fa\u6765\uff0c\u5e76\u5c06Shared_Clean\u548cShared_Dirty\u7684\u5927\u5c0f\u8fdb\u884c\u7d2f\u52a0\uff0c\u4ece\u800c\u53ef\u4ee5\u5f97\u51fa\u8fdb\u7a0b\u4e0e\u5176\u4ed6\u8fdb\u7a0b\u5171\u4eab\u7684\u5185\u5b58\u5927\u5c0f\u3002<\/p>\n

\u5bf9\u4e8ePerl\uff0c\u6709\u4e00\u4e2a\u540d\u4e3aLinux::Smaps\u7684\u6a21\u5757\uff0c\u5b83\u53ef\u4ee5\u5bf9\/proc\/PID\/smaps\u7684\u6570\u636e\u8fdb\u884c\u7f16\u7a0b\u5904\u7406\u3002\u6211\u5229\u7528\u5b83\u7f16\u5199\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u811a\u672c\u6765\u67e5\u627e\u5171\u4eab\u533a\u57df\u7684\u5927\u5c0f\u3002<\/p>\n

shared_memory_size.pl
\n#!\/usr\/bin\/env perl
\nuse strict;
\nuse warnings;
\nuse Linux::Smaps;<\/p>\n

@ARGV or die “usage: %0 [pid …]”;<\/p>\n

printf “PID\\tRSS\\tSHARED\\n”;<\/p>\n

for my $pid (@ARGV) {
\nmy $map = Linux::Smaps->new($pid);
\nunless ($map) {
\nwarn $!;
\nnext;
\n}<\/p>\n

printf
\n“%d\\t%d\\t%d (%d%%)\\n”,
\n$pid,
\n$map->rss,
\n$map->shared_dirty + $map->shared_clean,
\nint((($map->shared_dirty + $map->shared_clean) \/ $map->rss) * 100)
\n}<\/p>\n

\u5b83\u4f1a\u67e5\u627e\u5e76\u663e\u793a\u4ee5\u7ed9\u5b9aPID\u4f5c\u4e3a\u53c2\u6570\u7684\u8fdb\u7a0b\u7684\u5171\u4eab\u533a\u57df\u5927\u5c0f\u3002<\/p><\/blockquote>\n

\u8fd9\u662f\u7b2c\u4e00\u6b21\u63d0\u51fa\u5229\u7528\u811a\u672c\u8ba1\u7b97 MaxClients \u7684\u57fa\u7840\u3002
\n\u867d\u7136\u4f7f\u7528 Linux::Smaps \u4f1a\u7a0d\u5fae\u4e0d\u65b9\u4fbf\uff0c\u4f46\u5b83\u662f\u5927\u591a\u6570\u76f8\u5173\u6587\u7ae0\u6240\u5f15\u7528\u7684\u8457\u540d\u6587\u7ae0\u3002<\/p>\n

2008\u5e744\u67089\u65e5\uff08ID\uff1a\u9690\u85cf\uff09<\/h3>\n

\u5982\u4f55\u5728mod_perl\u4e2d\u589e\u52a0\u4e0e\u7236\u8fdb\u7a0b\u8fdb\u884c\u5199\u65f6\u590d\u5236\u7684\u5171\u4eab\u5185\u5b58\u3002- \u5173\u4e8ePerl\u3001\u5907\u5fd8\u5f55\u548c\u65e5\u8bb0\u7b49\u3002<\/p>\n

\u5982\u679c\u6709\u5927\u91cf\u8bbf\u95ee\u548c\u9700\u8981\u8bbe\u7f6e\u8f83\u5927\u7684MaxClient\uff0c\u5219\u51cf\u5c11Apache\u6bcf\u4e2a\u8fdb\u7a0b\u7684\u5185\u5b58\u662f\u5f88\u91cd\u8981\u7684\u3002\u5f53\u7136\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u907f\u514d\u52a0\u8f7d\u5927\u578b\u5e93\u5e76\u5c06\u56fe\u50cf\u8f6c\u6362\u6210Gearmand\u4efb\u52a1\u7b49\u5de7\u5999\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\uff0c\u4f46\u5728Apache\u7236\u8fdb\u7a0b\u548c\u5b50\u8fdb\u7a0b\u4e4b\u95f4\u5c3d\u53ef\u80fd\u589e\u52a0Copy on Write\u7684\u5171\u4eab\u5185\u5b58\u4e5f\u662f\u6709\u6548\u7684\u3002<\/p>\n

\u5c06\u6a21\u5757\u653e\u5165\u7236\u8fdb\u7a0b\u5185\u5b58\u7684\u65b9\u6cd5\u662f\uff0c\u5728startup.pl\u4e2d\u5c3d\u53ef\u80fd\u5730\u4f7f\u7528use\u3002\u5728apache\u7684config\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n

PerlRequire \/path\/to\/startup.pl<\/p>\n

\u5e76\u5728\u5176\u4e2d\u5217\u51fa\u6240\u4f7f\u7528\u7684\u5e94\u7528\u7a0b\u5e8f\u6a21\u5757\u3002<\/p>\n

\u4f7f\u7528use Hoge();\u5e76\u5728\u540e\u9762\u52a0\u4e0a()\u4ee5\u963b\u6b62\u51fd\u6570\u7684\u5bfc\u51fa\u3002\u8fd9\u6837\u505a\u5c31\u53ef\u4ee5\u589e\u52a0\u5171\u4eab\u5185\u5b58\u3002\u6b64\u5916\uff0cfork\u662f\u5bf9\u7236\u8fdb\u7a0b\u7684\u590d\u5236\uff0c\u6240\u4ee5\u4e8b\u5148\u4f7f\u7528use\u7f16\u8bd1\u6e90\u4ee3\u7801\u53ef\u4ee5\u8282\u7701\u5b50\u8fdb\u7a0b\u7f16\u8bd1\u7684\u6210\u672c\uff0c\u5982\u679c\u5c06MaxRequestPerChild\u8bbe\u7f6e\u4e3a\u8f83\u5c0f\u503c\uff0c\u5e76\u4e14\u8bbf\u95ee\u91cf\u5f88\u5927\u4e14\u5b50\u8fdb\u7a0b\u9891\u7e41\u518dfork\u7684\u7cfb\u7edf\u4e5f\u53ef\u4ee5\u51cf\u8f7b\u8d1f\u8f7d\u3002<\/p><\/blockquote>\n

2008\u5e745\u67086\u65e5 (id:hogem)<\/h3>\n

\u6211\u67e5\u4e86\u4e00\u4e0bApache\u7684MaxClients\u7684\u9002\u5f53\u503c – \u5728\u806a\u660e\u7684\u535a\u5ba2\u4e0a\u3002<\/p>\n

\u5982\u679cMPM\u662fprefork\u6a21\u5f0f\u7684\u8bdd\uff0c<\/p>\n

\u5b50\u8fdb\u7a0b\u6d88\u8017\u7684\u5185\u5b58\u5927\u5c0f\u4e58\u4ee5MaxClients\u5c0f\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u7684\u5185\u5b58\u5bb9\u91cf\u3002<\/p>\n

\u4e0d\u8fc7\uff0c\u8fd9\u4e2a\u8ba1\u7b97\u51fa\u6765\u7684\u6570\u5b57\u662f\u5047\u8bbe\u5b50\u8fdb\u7a0b\u4f7f\u7528\u7684\u5185\u5b58\u6ca1\u6709\u88ab\u5171\u4eab\u7684\u60c5\u51b5\u4e0b\u7684\uff0c\u6240\u4ee5MaxClients\u5e94\u8be5\u53ef\u4ee5\u662f\u66f4\u5927\u7684\u6570\u503c\u3002<\/p>\n

(RSS – SHR)\u4e58\u4ee5MaxClients\u5c0f\u4e8e\u7b49\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u7684\u5185\u5b58\u5bb9\u91cf\u3002<\/p>\n

SHR\uff1a\u5171\u4eab\u7684\u5185\u5b58\u5927\u5c0f
\n\u53ef\u4ee5\u901a\u8fc7top\u547d\u4ee4\u7684SHR\u9879\u8fdb\u884c\u786e\u8ba4\u3002
\nRSS\uff1a\u8fdb\u7a0b\u4f7f\u7528\u7684\u7269\u7406\u5185\u5b58\u5927\u5c0f
\n\u53ef\u4ee5\u901a\u8fc7ps\u6216\u8005top\u547d\u4ee4\u7684RSS\u9879\u8fdb\u884c\u786e\u8ba4\u3002<\/p><\/blockquote>\n

2009\u5e7409\u670810\u65e5\uff0c\u5e83\u702c\u6b63\u662d\uff08ID\uff1ahirose31\uff09\u3002<\/h3>\n

\u300cFicia\u300d\u4e0e\u57fa\u7840\u8bbe\u65bd\u548cPerl\u76f8\u5173\u7684\u7b49\u7b49\u4e8b\u9879<\/p>\n

\"\u300eFicia\u300f\u30a4\u30f3\u30d5\u30e9\u3068Perl\u306b\u307e\u3064\u308f\u308b\u30a8\u30c8\u30bb\u30c8\u30e92.png\"<\/div>\n

2009\u5e7412\u67089\u65e5\uff0c\u5317\u6751\u806a\u58eb\u3002<\/h3>\n

\u67e5\u8be2Apache\u7684\u5185\u5b58\u4f7f\u7528\u91cf- satooshi@blog<\/p>\n

\u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n

\u5728\u8fd9\u4e2a\u811a\u672c\u4e2d\uff0c\u6211\u4eec\u4ece\/proc\/PID\/status\u548c\/proc\/PID\/smaps\u83b7\u53d6\u6570\u636e\uff0c\u5e76\u5bf9\u4ee5\u4e0b\u5185\u5bb9\u8fdb\u884c\u8fc7\u6ee4\uff1a<\/p>\n

\/proc\/PID\/status
\nVmPeak
\nVmSize
\nVmHWM
\nVmRSS<\/p>\n

\/proc\/PID\/smaps
\nRss
\nShared_Clean
\nShared_Dirty<\/p>\n

\u6211\u4eec\u60f3\u8981\u8c03\u67e5\u6bcf\u4e2a\u8fdb\u7a0b\u7684\u5185\u5b58\u4f7f\u7528\u91cf\u3002<\/p>\n

getmem.sh
\n#!\/bin\/sh<\/p>\n

#1 \u4e2a\u8fdb\u7a0b\u540d
\nif [ $# -ne 1 ]; then
\nexit
\nfi<\/p>\n

# \u6253\u5370\u6807\u9898
\nprintf “PID\\tVmPeak\\tVmSize\\tVmHWM\\tVmRSS\\n”<\/p>\n

# \u83b7\u53d6\u5185\u5b58\u5927\u5c0f
\npid=`pgrep $1`<\/p>\n

for p in $pid
\ndo
\nif [ -f \/proc\/$p\/status ]; then
\nvm=`grep -e ‘^VmPeak:\\|VmSize:\\|VmHWM:\\|VmRSS:’ \/proc\/$p\/status | awk ‘{print $2}’`
\nprintf “%d\\t%d\\t%d\\t%d\\t%d\\n” $p $vm
\nfi
\ndone<\/p>\n

\u6211\u4eec\u60f3\u8981\u8c03\u67e5\u8fdb\u7a0b\u4e4b\u95f4\u5171\u4eab\u7684\u5185\u5b58\u4f7f\u7528\u91cf\u3002<\/p>\n

getshmem.sh
\n#!\/bin\/sh<\/p>\n

# $1 \u4e2a\u8fdb\u7a0b\u540d
\nif [ $# -ne 1 ]; then
\nexit
\nfi<\/p>\n

# \u6253\u5370\u6807\u9898
\nprintf “PID\\tRSS\\tSHARED\\n”<\/p>\n

# \u83b7\u53d6\u5171\u4eab\u5185\u5b58\u5927\u5c0f
\npid=`pgrep $1`<\/p>\n

for p in $pid
\ndo
\nif [ -f \/proc\/$p\/smaps ]; then
\nvm=`grep -e ‘^Rss:\\|^Shared_Clean:\\|^Shared_Dirty:’ \/proc\/$p\/smaps |
\nawk ‘
\nBEGIN {
\nrss = 0;
\nclean = 0;
\ndirty = 0;
\n}
\n{
\nif($1 == “Rss:”) {
\nrss += $2;
\n}
\nelse if($1 == “Shared_Clean:”) {
\nclean += $2;
\n}
\nelse if($1 == “Shared_Dirty:”) {
\ndirty += $2;
\n}
\n}
\nEND {
\nper = (rss == 0) ? 0 : (clean+dirty)*100\/rss;
\nprintf(“%d\\t%d\\t%d\\n”, rss, clean+dirty, per);
\n}
\n‘`<\/p>\n

printf “%d\\t%d\\t%d (%d%%)\\n” $p $vm
\nfi
\ndone<\/p><\/blockquote>\n

2010\u5e749\u67081\u65e5\uff0c\u957f\u91ce\u6b63\u5927\u3002<\/h3>\n

\u4e13\u4e1a\u670d\u52a1\u5668\u7ba1\u7406\u5458\u5c06Apache\u7684StartServers\u3001(Min|Max)SpareServers\u548cMaxClients\u8bbe\u7f6e\u4e3a\u76f8\u540c\u7684\u539f\u56e0 – blog.nomadscafe.jp<\/p>\n

\"\u56f3\u8868\"<\/div>\n

2010\u5e749\u670823\u65e5\uff0c\u970d\u5229\u3002<\/h3>\n

\u7528Copy on Write\u6765\u68c0\u67e5\u5171\u4eab\u7684\u5185\u5b58\u4f7f\u7528\u91cf\u3002\u50cf\u5f80\u5e38\u4e00\u6837\uff0c\u53ef\u4ee5\u4f7f\u7528shell\u8fdb\u884c\u64cd\u4f5c\u3002\u5982\u679c\u4f7f\u7528perl\uff0c\u6ca1\u6709\u5b89\u88c5Linux::Smaps\u7b49\u6a21\u5757\u3002<\/p>\n

smaps.sh
\n#!\/bin\/sh<\/p>\n

echo -e “\u8fdb\u7a0bID\\t\u865a\u62df\u5185\u5b58(VSZ)\\t\u5e38\u9a7b\u5185\u5b58(RSS)\\t\u5171\u4eab\u5185\u5b58(Shared)”
\nfor pid in $@; do
\nsmaps=”\/proc\/$pid\/smaps”
\nvsz=$(grep -E “^Size” $smaps | awk ‘BEGIN{ num = 0 } { num += $2 } END{ print num }’)
\nrss=$(grep -E “^Rss” $smaps | awk ‘BEGIN{ num = 0 } { num += $2 } END{ print num }’)
\nshared=$(grep -E “^Shared” $smaps | awk ‘BEGIN{ num = 0 } { num += $2 } END{ print num }’)
\npercent=$(echo “scale=2; ($shared \/ $rss) * 100” | bc | cut -d “.” -f 1)
\necho -e “$pid\\t${vsz}KB\\t${rss}KB\\t${shared}KB\uff08\u5360\u6bd4${percent}%\uff09”
\ndone<\/p>\n

\u901a\u8fc7\u8fd9\u4e2ashell\u811a\u672c\uff0c\u53ef\u4ee5\u6682\u65f6\u8f93\u51fa\u60f3\u8981\u68c0\u67e5\u7684\u8fdb\u7a0b\u5728Copy on Write\u4e0b\u5171\u4eab\u7684\u5185\u5b58\u4f7f\u7528\u91cf\u3002<\/p>\n

\u5c1d\u8bd5\u5728\u5b50\u8fdb\u7a0b\u4e2d\u7684\u6570\u7ec4\u7684\u4e00\u90e8\u5206\uff08\u7ea61\/10\uff09\u5199\u5165\u6570\u636e\u3002<\/p>\n

\u5927\u7ea61\/10\u7684\u6570\u636e\u4eceShared_Dirty\u53d8\u4e3a\u4e86Private_Dirty\u3002\u8fd9\u4e0e\u811a\u672c\u53ea\u54111\/10\u5199\u5165\u6570\u636e\u51e0\u4e4e\u4e00\u81f4\u3002<\/p><\/blockquote>\n

2011\u5e741\u670815\u65e5\uff08ID\uff1a\u53cb\u563f\uff09<\/h3>\n

Apache\u8c03\u4f18\u5185\u5b58\u4f7f\u7528\u91cf\u8ba1\u7b97 – \u5fc3\u4e2d\u611f\u6168<\/p>\n

\u51c6\u5907\u4e86\u4e00\u4e2a\u4ece”\/proc\/(pid)\/status”\u4e2d\u83b7\u53d6\u5185\u5b58\u6d88\u8017\u91cf\u5e76\u5217\u51fa\u7684\u811a\u672c\u3002<\/p>\n

memory_size.sh
\n#!\/bin\/sh<\/p>\n

GREP=”\/bin\/grep”
\nAWK=”\/bin\/awk”
\nPRINTF=”\/usr\/bin\/printf”<\/p>\n

if [ $# -lt 1 ]; then
\necho “\u7528\u6cd5\uff1a${0} [pid …]” 1>&2
\nexit 100
\nfi<\/p>\n

$PRINTF “\u8fdb\u7a0bID\\tRSS\\t(\u5cf0\u503c)\\t\u865a\u62df\u5185\u5b58\\t(\u5cf0\u503c)\\n”<\/p>\n

for p in $@
\ndo
\nstatus=”\/proc\/${p}\/status”
\nif [ -f $status ]; then
\nrsssize=`$GREP ‘^VmRSS:’ $status | $AWK ‘{print $2}’`
\nrsspeak=`$GREP ‘^VmHWM:’ $status | $AWK ‘{print $2}’`
\nvmsize=`$GREP ‘^VmSize:’ $status | $AWK ‘{print $2}’`
\nvmpeak=`$GREP ‘^VmPeak:’ $status | $AWK ‘{print $2}’`
\n$PRINTF \\
\n“%d\\t%d\\t(%d)\\t%d\\t(%d)\\n” \\
\n$p \\
\n$rsssize \\
\n$rsspeak \\
\n$vmsize \\
\n$vmpeak
\nfi
\ndone<\/p>\n

for p in `pgrep httpd`; do grep “^VmHWM:” \/proc\/$p\/status |awk ‘{print $2}’; done<\/p>\n

\u7136\u540e\u5c06\u6570\u636e\u5e26\u5165Excel\u8fdb\u884c\u5904\u7406\uff08\u4e22\u5f03\u65e7\u8fdb\u7a0b\u548c\u65b0\u8fdb\u7a0b\u6570\u636e\uff0c\u8ba1\u7b97\u5e73\u5747\u503c\uff0c\u9884\u6d4b\u8003\u8651\u5171\u4eab\u7684\u6d88\u8017\u91cf\uff09……<\/p><\/blockquote>\n

2011\u5e743\u670817\u65e5\uff08\u7f16\u53f7\uff1aR-H\uff09<\/h3>\n

\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u811a\u672c\u6765\u8ba1\u7b97Apache\u7684MaxClient- \u7f51\u7edc\u8bdd\u9898<\/p>\n

Apache\u914d\u7f6e\u6587\u4ef6\u4e2d\u7684MaxClients\u53c2\u6570\u53ef\u4ee5\u6839\u636e\u670d\u52a1\u5668\u89c4\u683c\u7b49\u8fdb\u884c\u8ba1\u7b97\uff0c\u56e0\u6b64\u6bcf\u6b21\u624b\u52a8\u8ba1\u7b97\u90fd\u5f88\u7e41\u7410\uff0c\u56e0\u6b64\u6211\u7f16\u5199\u4e86\u4e00\u4e2a\u811a\u672c\u3002<\/p>\n

\u8ba1\u7b97\u65b9\u6cd5\uff1a
\n(\u670d\u52a1\u5668\u5185\u5b58\u603b\u91cf) \/ (httpd\u4f7f\u7528\u5185\u5b58\u603b\u91cf – httpd\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u603b\u91cf) = MaxClients<\/p>\n

\u6e90\u4ee3\u7801\uff1a
\nhttps:\/\/github.com\/ryoppy\/Get-MaxClients.<\/p><\/blockquote>\n

2011\u5e745\u670819\u65e5Phize<\/h3>\n

Apache\u8c03\u4f18: \u8ba1\u7b97MaxClients\u53ef\u4ee5\u8bbe\u7f6e\u7684\u4e0a\u9650\u503c – (DxD)\u221e<\/p>\n

\u6211\u5df2\u7ecf\u521b\u5efa\u4e86\u4e00\u4e2a\u53ef\u4ee5\u8ba1\u7b97MaxClients\u4e0a\u9650\u503c\u7684shell\u811a\u672c\u3002<\/p>\n

get_max_clients.sh
\n#!\/bin\/bash<\/p>\n

_PIDS=(`pgrep httpd`)
\n_PROC_COUNT=${#_PIDS[@]}<\/p>\n

_MEMORY_TOTAL=`free | grep Mem | awk ‘{print $2;};’`
\n#_MEMORY_FREE=`vmstat -a | awk ‘NR==3{print $4+$5;};’`
\n_RSS_TOTAL=0
\n_SHARED_TOTAL=0<\/p>\n

for _PID in ${_PIDS[@]}; do
\n_SMAPS=`cat \/proc\/$_PID\/smaps`
\n_RSS=`echo “$_SMAPS” | grep Rss | awk ‘{value += $2} END {print value;};’`
\n_SHARED=`echo “$_SMAPS” | grep Shared | awk ‘{value += $2} END {print value;};’`
\n_RSS_TOTAL=`expr $_RSS_TOTAL + $_RSS`
\n_SHARED_TOTAL=`expr $_SHARED_TOTAL + $_SHARED`
\ndone<\/p>\n

_RSS_AVERAGE=`expr $_RSS_TOTAL \/ $_PROC_COUNT`
\n_SHARED_AVERAGE=`expr $_SHARED_TOTAL \/ $_PROC_COUNT`
\n_PROC_MEMORY=`expr $_RSS_AVERAGE – $_SHARED_AVERAGE`
\n#_MIN_MAX_CLIENTS=`expr $_MEMORY_FREE \/ $_PROC_MEMORY`
\n_MAX_MAX_CLIENTS=`expr $_MEMORY_TOTAL \/ $_PROC_MEMORY`<\/p>\n

echo “\u7dcf\u30e1\u30e2\u30ea\u91cf \/ (Rss\u5e73\u5747 – \u5171\u6709\u5e73\u5747) = $_MEMORY_TOTAL \/ ($_RSS_AVERAGE – $_SHARED_AVERAGE)”
\n#echo “\u7a7a\u304d\u30e1\u30e2\u30ea\u91cf \/ (Rss\u5e73\u5747 – \u5171\u6709\u5e73\u5747) = $_MEMORY_FREE \/ ($_RSS_AVERAGE – $_SHARED_AVERAGE)”
\n#echo “MaxClients = $_MIN_MAX_CLIENTS ~ $_MAX_MAX_CLIENTS”
\necho “MaxClients = $_MAX_MAX_CLIENTS”<\/p>\n

exit 0<\/p>\n

\u5b9e\u9645\u4e0a\uff0c\u7531\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u548c\u5176\u4ed6\u8fdb\u7a0b\u4e5f\u4f7f\u7528\u5185\u5b58\uff0c\u6240\u4ee5\u6700\u597d\u4f7f\u7528\u53ef\u7528\u5185\u5b58\u91cf\u800c\u4e0d\u662f\u603b\u5185\u5b58\u91cf\u3002<\/p>\n

(\u5df2\u6ce8\u91ca\u7684\u90e8\u5206\u662f\u4f7f\u7528\u53ef\u7528\u5185\u5b58\u91cf\u8ba1\u7b97MaxClients\u6570\u91cf\u3002\u7136\u800c\uff0c\u8bf7\u6ce8\u610f\u5b83\u6ca1\u6709\u8003\u8651\u5df2\u542f\u52a8\u7684Apache\u8fdb\u7a0b\u4f7f\u7528\u7684\u5185\u5b58\u91cf\uff0c\u56e0\u6b64\u4e0d\u5b8c\u6574\u3002)<\/p><\/blockquote>\n

2011\u5e748\u67085\u65e5\uff08ID\uff1ayumatsumo\uff09<\/h3>\n

\u8fdb\u7a0b\u7684\u5199\u65f6\u590d\u5236\u5171\u4eab\u5185\u5b58\u7684\u5927\u5c0f – \u677e\u672c\u7684\u535a\u5ba2<\/p>\n

\u6211\u5199\u4e86\u4e00\u4e2a\u76f4\u63a5\u8bfb\u53d6\/proc\/PID\/smaps\u6587\u4ef6\u7684\u811a\u672c\u3002<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\uff0c\u4f60\u4e0d\u9700\u8981\u5b89\u88c5Linux::Smaps\u4e5f\u53ef\u4ee5\u4f7f\u7528\u3002(List::Util\u662f\u6838\u5fc3\u6a21\u5757\uff0c\u53ea\u8981\u662f5.8\u7248\u672c\u4ee5\u4e0a\u5c31\u6709\uff0c\u6240\u4ee5\u4f7f\u7528\u4e86\u5b83\u3002)<\/p>\n

shared_memory_size.pl
\n#!\/bin\/env perl<\/p>\n

use strict;
\nuse warnings;<\/p>\n

use List::Util ();<\/p>\n

@ARGV or die “\u4f7f\u7528\u65b9\u6cd5\uff1a%0 [pid …]”;<\/p>\n

my @output;<\/p>\n

foreach my $pid (@ARGV) {
\ndie “\u65e0\u6548\u7684\u8fdb\u7a0b\u53f7 ‘$pid'” if $pid =~ \/\\D\/;
\nmy @smaps = `cat \/proc\/$pid\/smaps`;
\ndie if $? != 0;
\nmy @shared = map { \/(\\d+)\\s+kB\/; $1 } grep { \/^Shared_(Clean|Dirty)\/ } @smaps;
\nmy $shared_total = List::Util::sum(@shared);
\nmy @rss = map { \/(\\d+)\\s+kB\/; $1 } grep { \/^Rss\/ } @smaps;
\nmy $rss_total = List::Util::sum(@rss);
\nmy $parcent = sprintf ‘(%d %%)’, int(($shared_total \/ $rss_total) * 100);
\npush @output, [$pid, $rss_total, $parcent];
\n}<\/p>\n

unshift @output, [qw(PID RSS SHARED)];<\/p>\n

foreach my $out (@output) {
\nprint join “\\t”, @$out;
\nprint “\\n”;
\n}<\/p><\/blockquote>\n

2012\u5e748\u670812\u65e5\uff0c\u89c9\u89c9\u7684iPhone\u3002<\/h3>\n

30\u5c81\u7684WEB\u5de5\u7a0b\u5e08\u7684\u65e5\u8bb0\uff1aApache\u8fdb\u7a0b\u7684\u5185\u5b58\u4f7f\u7528\u91cf<\/p>\n

\u770b\u8d77\u6765\uff0c\u6211\u4eec\u4e0d\u80fd\u7b80\u5355\u5730\u901a\u8fc7\u67e5\u770b\/proc\/(PID)\/status\u7684VmHWM\u6765\u4e86\u89e3\u6bcf\u4e2a\u8fdb\u7a0b\u7684\u5185\u5b58\u4f7f\u7528\u91cf\u3002
\n\u5f53\u4ece\u7236\u8fdb\u7a0bfork\u5b50\u8fdb\u7a0b\u65f6\uff0c\u5b50\u8fdb\u7a0b\u4f1a\u5171\u4eab\u7236\u8fdb\u7a0b\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u8003\u8651\u5171\u4eab\u90e8\u5206\u3002<\/p>\n

\u7531\u4e8e\/proc\/(PID)\/smaps\u4f3c\u4e4e\u53ea\u5141\u8bb8root\u7528\u6237\u8bfb\u53d6\u6743\u9650\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u4ee5root\u7528\u6237\u8eab\u4efd\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n

echo -e “PID\\tPPID\\tRSS\\tSHARED\\tPRIVATE”;ps -ef|grep httpd|grep -v grep|while read line;do args=(${line});echo -ne ${args[1]}”\\t”${args[2]}”\\t”;cat \/proc\/${args[1]}\/smaps|awk ‘BEGIN{rss=0;shared=0;}\/Rss\/{rss+=$2;}\/Shared\/{shared+=$2;}END{printf(“%.1f\\t%.1f\\t%.1f\\n”,rss\/1024,shared\/1024,(rss-shared)\/1024);}’;done<\/p><\/blockquote>\n

\u89e3\u8aac\u5982\u4f55\u8a08\u7b97Apache\u6bcf\u500b\u9032\u7a0b\u7684\u8a18\u61b6\u9ad4\u4f7f\u7528\u91cf\u7684\u547d\u4ee4\uff1a30\u6b72\u7684WEB\u5de5\u7a0b\u5e2b\u7684\u65e5\u8a18<\/p>\n

\u4e3a\u4e86\u4f7f\u7a0b\u5e8f\u7ed3\u6784\u66f4\u6613\u4e8e\u7406\u89e3\uff0c\u6211\u5728\u4e0a\u6b21\u4ecb\u7ecd\u7684\u547d\u4ee4\u4e2d\u6dfb\u52a0\u4e86\u6362\u884c\u7b26\u3002<\/p>\n

echo -e “PID\\tPPID\\tRSS\\tSHARED\\tPRIVATE”;
\nps -ef
\n|grep httpd
\n|grep -v grep
\n|while read line;
\ndo
\nargs=(${line});
\necho -ne ${args[1]}”\\t”${args[2]}”\\t”;
\ncat \/proc\/${args[1]}\/smaps
\n|awk ‘
\nBEGIN{rss=0;shared=0;}
\n\/Rss\/{rss+=$2;}
\n\/Shared\/{shared+=$2;}
\nEND{printf(“%.1f\\t%.1f\\t%.1f\\n”,rss\/1024,shared\/1024,(rss-shared)\/1024);}
\n‘;
\ndone<\/p>\n

[\u7b2c\u4e00\u884c] \u8f93\u51fa\u6807\u9898\u884c\uff08\u6bcf\u5217\u4ee5\u5236\u8868\u7b26\u5206\u9694\uff09
\n[\u7b2c\u4e8c\u884c] \u4f7f\u7528ps\u547d\u4ee4\u83b7\u53d6\u8fdb\u7a0b\u5217\u8868
\n[\u7b2c\u4e09\u3001\u56db\u884c] \u63d0\u53d6\u5305\u542b\u5b57\u7b26\u4e32\u201chttpd\u201d\u7684\u884c\uff08\u6392\u9664grep\u547d\u4ee4\u7684\u8fdb\u7a0b\uff09
\n[\u7b2c\u4e94\u3001\u516d\u884c] \u5bf9\u83b7\u53d6\u7684\u7ed3\u679c\uff0c\u9010\u884c\u6267\u884c\u7b2c\u4e03\u884c\u5230\u7b2c\u5341\u4e94\u884c\u7684\u5faa\u73af\u5904\u7406
\n[\u7b2c\u4e03\u884c] \u5c06\u7b2c\u4e09\u3001\u56db\u884c\u83b7\u53d6\u7684\u7ed3\u679c\u4ee5\u7a7a\u683c\u4e3a\u5206\u9694\u7b26\u5206\u5272\u4e3a\u6570\u7ec4\u5b58\u50a8
\n[\u7b2c\u516b\u884c] \u8f93\u51fa\u8fdb\u7a0bID\u3001\u7236\u8fdb\u7a0bID\uff08\u4e0d\u6362\u884c\uff09
\n[\u7b2c\u4e5d\u3001\u5341\u3001\u5341\u516d\u884c] \u8bfb\u53d6\u8fdb\u7a0bID\u5bf9\u5e94\u7684smaps\u6587\u4ef6\uff0c\u5e76\u4f20\u9012\u7ed9awk\u547d\u4ee4\uff0c\u6267\u884c\u7b2c\u5341\u4e00\u884c\u5230\u7b2c\u5341\u56db\u884c\u7684\u5904\u7406\u5faa\u73af
\n[\u7b2c\u5341\u4e00\u884c] \u5728awk\u547d\u4ee4\u4e2d\u521d\u59cb\u5316\u53d8\u91cf
\n[\u7b2c\u5341\u4e8c\u884c] \u5982\u679c\u5305\u542b\u5b57\u7b26\u4e32\u201cRss\u201d\u7684\u884c\uff0c\u5219\u5c06\u503c\u52a0\u5230\u53d8\u91cfRss
\n[\u7b2c\u5341\u4e09\u884c] \u5982\u679c\u5305\u542b\u5b57\u7b26\u4e32\u201cShared\u201d\u7684\u884c\uff0c\u5219\u5c06\u503c\u52a0\u5230\u53d8\u91cfShared
\n[\u7b2c\u5341\u56db\u884c] \u5728\u904d\u5386smaps\u6587\u4ef6\u7684\u6240\u6709\u884c\u540e\uff0c\u8f93\u51fa\u53d8\u91cfRss\u3001\u53d8\u91cfShared\u3001\u53d8\u91cfRss-\u53d8\u91cfShared\uff0c\u5e76\u6362\u884c\u8f93\u51fa<\/p><\/blockquote>\n

2013\u5e743\u670828\u65e5\uff0c\u6a4b\u672c\u5343\u5c0b\u3002<\/h3>\n

\u6d4b\u91cfApache\uff08httpd\uff09\u7684\u5185\u5b58\u4f7f\u7528\u91cf – \u4e0d\u5b8c\u6574\u7684\u5c38\u4f53<\/p>\n

#!\/bin\/bash<\/span>\r\n\r\nPIDS<\/span>=<\/span>`<\/span>ps axfv | grep <\/span>httpd | grep<\/span> -v<\/span> 'grep'<\/span> | awk<\/span> '{print $1}'<\/span>`<\/span>\r\nSUM<\/span>=<\/span>0\r\nCOUNT<\/span>=<\/span>0\r\n\r\nprintf<\/span> \"MEM<\/span>\\t<\/span>S_Clean<\/span>\\t<\/span>S_Dirty<\/span>\\t<\/span>Own_Memory<\/span>\\n<\/span>\"<\/span>\r\nfor <\/span>pid in<\/span> $PIDS<\/span>\r\ndo\r\n  <\/span>MEM<\/span>=<\/span>$(<\/span>cat<\/span> \/proc\/$pid<\/span>\/status | grep<\/span> 'VmHWM'<\/span> | awk<\/span> '{print $2}'<\/span>)<\/span>\r\n  SC<\/span>=<\/span>$(<\/span>grep <\/span>Shared_Clean \/proc\/$pid<\/span>\/smaps | awk<\/span> 'BEGIN{n=0}{n+=$2}END{print n}'<\/span>)<\/span>\r\n  SD<\/span>=<\/span>$(<\/span>grep <\/span>Shared_Dirty \/proc\/$pid<\/span>\/smaps | awk<\/span> 'BEGIN{n=0}{n+=$2}END{print n}'<\/span>)<\/span>\r\n  OWN_MEM<\/span>=<\/span>`<\/span>expr<\/span> $MEM<\/span> - \\(<\/span> $SC<\/span> + $SD<\/span> \\)<\/span>`<\/span>\r\n  SUM<\/span>=<\/span>`<\/span>expr<\/span> $SUM<\/span> + $OWN_MEM<\/span>`<\/span>\r\n  printf<\/span> \"<\/span>$MEM<\/span>\\t<\/span>$SC<\/span>\\t<\/span>$SD<\/span>\\t<\/span>$OWN_MEM<\/span>\\n<\/span>\"<\/span>\r\n  COUNT<\/span>=<\/span>`<\/span>expr<\/span> $COUNT<\/span> + 1`<\/span>\r\ndone\r\n<\/span>printf<\/span> \"SUMMARY<\/span>\\t<\/span>$SUM<\/span> kb<\/span>\\n<\/span>\"<\/span>\r\nAVG<\/span>=<\/span>`<\/span>expr<\/span> $SUM<\/span> \/ $COUNT<\/span>`<\/span>\r\nprintf<\/span> \"AVG<\/span>\\t<\/span>$AVG<\/span> kb<\/span>\\n<\/span>\"<\/span>\r\n<\/code><\/pre>\n
2013\u5e7410\u670810\u65e5 (hirobanex)<\/h3>\n
\u4e0eApache\u6216\u6d3e\u751f\u8fdb\u7a0b\u7684\u5185\u5b58\u8c03\u4f18\u76f8\u5173\u7684\u7b14\u8bb0\u548c\u811a\u672c | hirobanex.net<\/p>\n
\u5f53\u6211\u68c0\u67e5apache\u8fdb\u7a0b\u65f6\uff0c\u9700\u8981\u4f7f\u7528sudo\u6267\u884c\uff0c\u56e0\u6b64\u6211\u4e0d\u5f97\u4e0d\u6bcf\u6b21\u90fd\u5b89\u88c5Linux::Smaps\u5230System Perl\u3002\u800c\u4e14\uff0c\u5728\u6211\u7684Ubuntu\u73af\u5883\u4e2d\uff0c\u6700\u65b0\u7248\u672c\u76840.12\u768406-VmFlags.t\u6d4b\u8bd5\u5931\u8d25\u4e86\uff0c\u5f88\u70e6\u4eba\u3002\u6211\u60f3\u5230\u53ef\u4ee5\u4e0d\u4f7f\u7528Linux::Smaps\uff0c\u6240\u4ee5\u6211\u628a\u5b83\u811a\u672c\u5316\u4e86\u3002<\/p>\n
\u53e6\u5916\uff0c\u6bcf\u6b21\u90fd\u8981\u8fdb\u884c\u975e\u5171\u4eab\u90e8\u5206\u7684\u5185\u5b58\u4f7f\u7528\u91cf\u4e58\u6cd5\u8fd0\u7b97\u5f88\u9ebb\u70e6\uff0c\u6240\u4ee5\u6211\u51b3\u5b9a\u5c06\u5176\u663e\u793a\u5728\u53f3\u4fa7\u3002<\/p>\n
none_shared_memory_fetcher.pl
\n#!\/usr\/bin\/env perl
\nuse strict;
\nuse warnings;<\/p>\n
@ARGV or die “usage: %0 [pid …]”;<\/p>\n
printf “PID\\tRSS\\tSHARED\\tNONE_SHARED\\n”;<\/p>\n
for my $pid (@ARGV) {
\nopen my $fh, “< \/proc\/$pid\/smaps” or (warn $! and next);
\nmy @rows = <$fh>;
\nmy $rss = mem_size_fetcher(‘Rss’,@rows) or next;
\nmy $shared = mem_size_fetcher(‘Shared_Clean’,@rows) + mem_size_fetcher(‘Shared_Dirty’,@rows);<\/p>\n
printf
\n“%d\\t%d\\t%d (%d%%)\\t%d\\n”,
\n$pid,
\n$rss,
\n$shared,
\nint(($shared \/ $rss) * 100),
\n($rss – $shared),
\n}<\/p>\n
sub mem_size_fetcher {
\nmy ($target,@rows) = @_;<\/p>\n
my $mem_size = 0;<\/p>\n
for my $row (@rows) {
\nmy ($mem) = $row =~ \/^$target:\\s*(\\d+)\/i;
\n$mem_size +=($mem||0);
\n}<\/p>\n
return $mem_size;
\n}<\/p>\n
NONE_SHARED\u8868\u793a\u5b50\u8fdb\u7a0b\u72ec\u7acb\u7684\u5185\u5b58\u4f7f\u7528\u91cf\u3002<\/p>\n
\u53e6\u5916\uff0c\u8bf7\u6ce8\u610f\uff0c\u7531\u4e8e\u6bcf\u6b21\u8bf7\u6c42\u53ef\u80fd\u4f1a\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u7b49\u95ee\u9898\uff0c\u5b50\u8fdb\u7a0b\u6709\u589e\u5927\u7684\u8d8b\u52bf\uff0c\u6240\u4ee5\u9700\u8981\u8fdb\u884c\u4e00\u5b9a\u6570\u91cf\u7684\u8bf7\u6c42\u5e76\u5728\u63a5\u8fd1MaxRequestsPerChild\u7684\u8fdb\u7a0b\u4e0a\u8ba1\u7b97\u3002<\/p><\/blockquote>\n
2014\u5e7412\u670823\u65e5\uff08@gotyoooo\uff09<\/h3>\n
\u5723\u8bde\u524d\u591c\u670d\u52a1\u5668\u6545\u969c\u7684\u6545\u969c\u6392\u9664 – Qiita\uff0c\u8ba9\u6211\u4eec\u65e9\u70b9\u56de\u5bb6<\/p>\n
\u68c0\u67e5_apache_memory.sh
\n#!\/bin\/sh
\nMEMTOTAL=`grep ‘MemTotal’ \/proc\/meminfo | awk ‘{print $2}’`
\nUNIT=`grep ‘MemTotal’ \/proc\/meminfo | awk ‘{print $3}’`<\/p>\n
PARENT_PID=`ps auxw | grep httpd | grep root | grep -v grep | awk ‘{print $2}’`
\nPARENT_MEM=`grep ‘VmHWM’ \/proc\/${PARENT_PID}\/status | awk ‘{print $2}’`<\/p>\n
PID=`ps auxw | grep httpd | grep -v root | awk ‘{print $2}’`
\nCOUNT=0
\nCHILED_MEM_TOTAL=0
\nCHILED_MEM_TOTAL_NO_SHARE=0<\/p>\n
echo -e “[apache\u8fdb\u7a0b\u5185\u5b58\u4f7f\u7528\u91cf]”
\necho -e “(\u7236\u8fdb\u7a0b)”
\necho -e “\u8fdb\u7a0bID\\t\u5185\u5b58”
\necho -e “${PARENT_PID}\\t${PARENT_MEM}${UNIT}”
\necho -e “(\u5b50\u8fdb\u7a0b)”
\necho -e “\u8fdb\u7a0bID\\t\u5185\u5b58\\t\u5171\u4eab\\t\u72ec\u7acb”
\nfor pid in $PID
\ndo
\nPMEM=`grep ‘VmHWM’ \/proc\/${pid}\/status | awk ‘{print $2}’`
\nSHARE_MEM=`awk ‘BEGIN{shared=0;}\/Shared\/{shared+=$2;}END{printf(“%d”,shared);}’ \/proc\/${pid}\/smaps`
\nPRIVATE_MEM=`expr $PMEM – $SHARE_MEM`
\nCHILED_MEM_TOTAL=`expr $CHILED_MEM_TOTAL + $PMEM`
\nCHILED_MEM_TOTAL_NO_SHARE=`expr $CHILED_MEM_TOTAL_NO_SHARE + $PRIVATE_MEM`
\nCOUNT=`expr $COUNT + 1`
\necho -e “${pid}\\t${PMEM}${UNIT}\\t${SHARE_MEM}${UNIT}\\t${PRIVATE_MEM}${UNIT}”
\ndone<\/p>\n
CHILED_MEM_AVE=`expr $CHILED_MEM_TOTAL \/ $COUNT`
\nCHILED_MEM_AVE_NO_SHARE=`expr $CHILED_MEM_TOTAL_NO_SHARE \/ $COUNT`<\/p>\n
echo -e “\u5b50\u8fdb\u7a0b\u6570 \\t\\t\\t: ${COUNT}”
\necho -e “\u5b50\u8fdb\u7a0b\u5185\u5b58\u4f7f\u7528\u91cf\u5408\u8ba1 \\t: ${CHILED_MEM_TOTAL} ${UNIT}”
\necho -e “\u5b50\u8fdb\u7a0b\u5185\u5b58\u4f7f\u7528\u91cf\u5e73\u5747 \\t: ${CHILED_MEM_AVE} ${UNIT}”
\necho -e “\u5b50\u8fdb\u7a0b\u5185\u5b58\u4f7f\u7528\u91cf\u5408\u8ba1(\u4e0d\u5305\u542b\u5171\u4eab) \\t: ${CHILED_MEM_TOTAL_NO_SHARE} ${UNIT}”
\necho -e “\u5b50\u8fdb\u7a0b\u5185\u5b58\u4f7f\u7528\u91cf\u5e73\u5747(\u4e0d\u5305\u542b\u5171\u4eab) \\t: ${CHILED_MEM_AVE_NO_SHARE} ${UNIT}”<\/p>\n
echo “==============================================================”
\nUSE_MEM=`expr $PARENT_MEM + $CHILED_MEM_TOTAL_NO_SHARE`
\necho -e “apache\u5185\u5b58\u4f7f\u7528\u91cf \\t: ${USE_MEM} ${UNIT}”
\necho -e “\u603b\u5185\u5b58\u91cf \\t\\t: ${MEMTOTAL} ${UNIT}”<\/p><\/blockquote>\n
2016\u5e741\u67087\u65e5\uff0c\u4e9a\u9a6c\u900a AWS\u3002<\/h3>\n
\u5728\u4e9a\u9a6c\u900a EC2 \u4e0a\u5bf9 Apache \u8fdb\u884c\u5185\u5b58\u8c03\u4f18\u3002<\/p>\n
5.\u8ba1\u7b97\u4ee5\u4e0b\u8bbe\u7f6e\u53d8\u91cf ServerLimit \u548c MaxClients\uff08\u6216 Apache 2.4 \u7684\u60c5\u51b5\u4e0b\u4e3a MaxRequestWorkers\uff09\u7684\u503c\u3002
\na. \u5982\u679c\u5b9e\u4f8b\u7684 RAM \u8d85\u8fc7 4 GB\uff0c\u5219\u901a\u8fc7 Apache \u8fdb\u7a0b\u7684\u5e73\u5747 %MEM \u503c\u9664\u4ee5 90%\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5e73\u5747 %MEM \u503c\u4e3a 0.8%\uff0c\u5219\u5c06 90%\uff080.9\uff09\u9664\u4ee5 0.8%\uff080.008\uff09\u3002
\n\u7ed3\u679c\u4e3a 112.5\uff0c\u5728\u5c0f\u6570\u70b9\u7b2c\u4e00\u4f4d\u56db\u820d\u4e94\u5165\u4e3a\u6574\u6570\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7ed3\u679c\u4e3a 112\u3002
\nb. \u5982\u679c\u5b9e\u4f8b\u7684 RAM \u5c0f\u4e8e\u7b49\u4e8e 4 GB\uff0c\u5219\u901a\u8fc7 Apache \u8fdb\u7a0b\u7684\u5e73\u5747 %MEM \u503c\u9664\u4ee5 80%\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5e73\u5747 %MEM \u503c\u4e3a 0.8%\uff0c\u5219\u5c06 80%\uff080.8\uff09\u9664\u4ee5 0.8%\uff080.008\uff09\u3002
\n\u7ed3\u679c\u4e3a 100\u3002
\n\u6ce8\u610f
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