https://www.mywiki.cn/Hovercool/index.php?action=history&feed=atom&title=%E5%88%86%E6%9E%90wiki%E5%8D%A1%E4%BD%8F%E9%97%AE%E9%A2%98 分析wiki卡住问题 - 版本历史 2026-09-01T05:29:56Z 本wiki上该页面的版本历史 MediaWiki 1.45.1 https://www.mywiki.cn/Hovercool/index.php?title=%E5%88%86%E6%9E%90wiki%E5%8D%A1%E4%BD%8F%E9%97%AE%E9%A2%98&diff=132087&oldid=prev 2025年2月7日 (五) 06:01 Hovercool 2025-02-07T06:01:04Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hans-CN"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上一版本</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">2025年2月7日 (五) 06:01的版本</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3">第3行：</td> <td colspan="2" class="diff-lineno">第3行：</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>出现问题后查看服务器监测，可以明显看到系统cpu/memory异常，都基本用完了。</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>出现问题后查看服务器监测，可以明显看到系统cpu/memory异常，都基本用完了。</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[文件:<del style="font-weight: bold; text-decoration: none;">Cpu&amp;Mem信息</del>.jpg]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[文件:<ins style="font-weight: bold; text-decoration: none;">Cpu_Mem信息</ins>.jpg]]</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>root@iZ23diqq85dZ:/var/log/apache2# free -m</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>root@iZ23diqq85dZ:/var/log/apache2# free -m</div></td></tr> </table> Hovercool https://www.mywiki.cn/Hovercool/index.php?title=%E5%88%86%E6%9E%90wiki%E5%8D%A1%E4%BD%8F%E9%97%AE%E9%A2%98&diff=132086&oldid=prev 2025年2月7日 (五) 06:00 Hovercool 2025-02-07T06:00:07Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hans-CN"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上一版本</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">2025年2月7日 (五) 06:00的版本</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3">第3行：</td> <td colspan="2" class="diff-lineno">第3行：</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>出现问题后查看服务器监测，可以明显看到系统cpu/memory异常，都基本用完了。</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>出现问题后查看服务器监测，可以明显看到系统cpu/memory异常，都基本用完了。</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[文件:<del style="font-weight: bold; text-decoration: none;">系统监测cpu/mem信息</del>.jpg]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[文件:<ins style="font-weight: bold; text-decoration: none;">Cpu&amp;Mem信息</ins>.jpg]]</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;pre&gt;</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>root@iZ23diqq85dZ:/var/log/apache2# free -m</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>root@iZ23diqq85dZ:/var/log/apache2# free -m</div></td></tr> </table> Hovercool https://www.mywiki.cn/Hovercool/index.php?title=%E5%88%86%E6%9E%90wiki%E5%8D%A1%E4%BD%8F%E9%97%AE%E9%A2%98&diff=132084&oldid=prev 2025年2月7日 (五) 05:55 Hovercool 2025-02-07T05:55:49Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hans-CN"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上一版本</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">2025年2月7日 (五) 05:55的版本</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l117">第117行：</td> <td colspan="2" class="diff-lineno">第117行：</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[&lt;ffffffffffffffff&gt;] 0xffffffffffffffff</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[&lt;ffffffffffffffff&gt;] 0xffffffffffffffff</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>&lt;/pre&gt;</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">可以看到，基本都是在swap内存，即内存不足。</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">这些状态为D的apache进程基本都是在swap内存，即内存不足。</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>再以mem对top进行排序：</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>再以mem对top进行排序：</div></td></tr> </table> Hovercool https://www.mywiki.cn/Hovercool/index.php?title=%E5%88%86%E6%9E%90wiki%E5%8D%A1%E4%BD%8F%E9%97%AE%E9%A2%98&diff=132083&oldid=prev 2025年2月7日 (五) 05:53 Hovercool 2025-02-07T05:53:03Z <p></p> <p><b>新页面</b></p><div>从24年9月开始，wiki便开始偶发宕机卡住问题，因此当时建立了监测预警，权宜之计就是出现问题后执行reboot。<br /> 但后面发现，问题出现后连ssh都很难连上，reboot也响应得很慢，因此彻底分析一下。<br /> <br /> 出现问题后查看服务器监测，可以明显看到系统cpu/memory异常，都基本用完了。<br /> [[文件:系统监测cpu/mem信息.jpg]]<br /> &lt;pre&gt;<br /> root@iZ23diqq85dZ:/var/log/apache2# free -m<br /> total used free shared buffers cached<br /> Mem: 2012 1958 54 0 2 14<br /> -/+ buffers/cache: 1941 71<br /> Swap: 1023 1023 0<br /> &lt;/pre&gt;<br /> <br /> 查看top信息，发现load average非常高，而基本都是apache进程占用了，并且这些进程很多处于D状态：<br /> &lt;pre&gt;<br /> root@iZ23diqq85dZ:/var/log/apache2# top<br /> top - 12:45:01 up 1:27, 2 users, load average: 86.24, 80.57, 80.64<br /> Tasks: 234 total, 2 running, 232 sleeping, 0 stopped, 0 zombie<br /> %Cpu(s): 1.7 us, 17.9 sy, 0.0 ni, 0.0 id, 80.4 wa, 0.0 hi, 0.0 si, 0.0 st<br /> KiB Mem: 2061064 total, 2008040 used, 53024 free, 2628 buffers<br /> KiB Swap: 1048572 total, 1047992 used, 580 free, 14392 cached<br /> <br /> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND<br /> 5586 mysql 20 0 1341m 58m 916 S 5.6 2.9 0:05.22 mysqld<br /> 5250 www-data 20 0 177m 15m 3836 D 5.0 0.8 0:02.09 apache2<br /> 5091 www-data 20 0 183m 9444 3240 D 3.7 0.5 0:02.43 apache2<br /> 5088 www-data 20 0 188m 22m 2860 D 3.3 1.1 0:03.46 apache2<br /> 5261 www-data 20 0 183m 9380 3236 D 2.7 0.5 0:01.79 apache2<br /> 5242 www-data 20 0 184m 16m 4304 D 2.3 0.8 0:02.20 apache2<br /> 5282 www-data 20 0 188m 21m 2940 D 2.3 1.1 0:01.98 apache2<br /> 5310 www-data 20 0 187m 21m 2708 D 2.3 1.1 0:02.11 apache2<br /> 5590 www-data 20 0 181m 19m 3908 S 2.3 1.0 0:00.50 apache2<br /> 5113 www-data 20 0 183m 14m 3528 D 1.0 0.7 0:01.77 apache2<br /> 5240 www-data 20 0 178m 9768 3200 D 1.0 0.5 0:01.62 apache2<br /> 5278 www-data 20 0 181m 19m 3916 D 1.0 1.0 0:00.77 apache2<br /> 5080 www-data 20 0 188m 23m 2988 D 0.7 1.2 0:03.09 apache2<br /> 2008 root 20 0 426m 7780 864 S 0.3 0.4 1:04.18 exe<br /> 4956 www-data 20 0 183m 13m 3456 D 0.3 0.7 0:07.05 apache2<br /> 4969 www-data 20 0 188m 22m 2912 D 0.3 1.1 0:06.81 apache2<br /> 5085 www-data 20 0 187m 25m 4256 D 0.3 1.3 0:01.32 apache2<br /> 5234 www-data 20 0 188m 25m 4224 D 0.3 1.3 0:02.33 apache2<br /> 5241 www-data 20 0 175m 8604 3224 D 0.3 0.4 0:01.04 apache2<br /> 5254 www-data 20 0 188m 24m 2928 D 0.3 1.2 0:01.50 apache2<br /> 5256 www-data 20 0 245m 13m 3524 D 0.3 0.7 0:02.12 apache2<br /> 5266 www-data 20 0 183m 22m 4268 D 0.3 1.1 0:01.28 apache2<br /> 5267 www-data 20 0 188m 23m 2964 D 0.3 1.2 0:01.53 apache2<br /> 5284 www-data 20 0 188m 24m 2936 D 0.3 1.2 0:01.07 apache2<br /> 5286 www-data 20 0 188m 23m 2928 D 0.3 1.2 0:01.99 apache2<br /> 5597 www-data 20 0 181m 19m 3872 S 0.3 0.9 0:00.27 apache2<br /> &lt;/pre&gt;<br /> 选取其中几个看下进程详情：<br /> &lt;pre&gt;<br /> root@iZ23diqq85dZ:/var/log/apache2# cat /proc/5242/status /proc/5242/stack<br /> Name: apache2<br /> State: D (disk sleep)<br /> Tgid: 5242<br /> Pid: 5242<br /> PPid: 2069<br /> TracerPid: 0<br /> Uid: 33 33 33 33<br /> Gid: 33 33 33 33<br /> FDSize: 64<br /> Groups: 33<br /> VmPeak: 193612 kB<br /> VmSize: 188756 kB<br /> VmLck: 0 kB<br /> VmPin: 0 kB<br /> VmHWM: 26828 kB<br /> VmRSS: 17804 kB<br /> VmData: 30780 kB<br /> VmStk: 136 kB<br /> VmExe: 456 kB<br /> VmLib: 23760 kB<br /> VmPTE: 352 kB<br /> VmSwap: 9296 kB<br /> Threads: 1<br /> SigQ: 0/16008<br /> SigPnd: 0000000000000000<br /> ShdPnd: 0000000000000000<br /> SigBlk: 0000000000000000<br /> SigIgn: 0000000000001000<br /> SigCgt: 000000018c0046eb<br /> CapInh: 0000000000000000<br /> CapPrm: 0000000000000000<br /> CapEff: 0000000000000000<br /> CapBnd: ffffffffffffffff<br /> Cpus_allowed: 3<br /> Cpus_allowed_list: 0-1<br /> Mems_allowed: 00000000,00000001<br /> Mems_allowed_list: 0<br /> voluntary_ctxt_switches: 4406<br /> nonvoluntary_ctxt_switches: 558<br /> [&lt;ffffffff8119a2fc&gt;] get_request_wait+0x105/0x18f<br /> [&lt;ffffffff8105fd53&gt;] autoremove_wake_function+0x0/0x2a<br /> [&lt;ffffffff8119b25b&gt;] blk_queue_bio+0x17f/0x28c<br /> [&lt;ffffffff81199d88&gt;] generic_make_request+0x90/0xcf<br /> [&lt;ffffffff81199e9a&gt;] submit_bio+0xd3/0xf1<br /> [&lt;ffffffff810bc1cf&gt;] test_set_page_writeback+0xdc/0xeb<br /> [&lt;ffffffff810de46d&gt;] swap_writepage+0x8b/0x95<br /> [&lt;ffffffff810c3433&gt;] shrink_page_list+0x40d/0x73f<br /> [&lt;ffffffff810ca636&gt;] zone_page_state_add+0x14/0x23<br /> [&lt;ffffffff810c3b89&gt;] shrink_inactive_list+0x256/0x3f0<br /> [&lt;ffffffff8107116d&gt;] arch_local_irq_save+0x11/0x17<br /> [&lt;ffffffff810c43c5&gt;] shrink_zone+0x3c0/0x4e6<br /> [&lt;ffffffff810c48e3&gt;] do_try_to_free_pages+0x1cc/0x41c<br /> [&lt;ffffffff810c4d9e&gt;] try_to_free_pages+0xa9/0xe9<br /> [&lt;ffffffff810bbc75&gt;] __alloc_pages_nodemask+0x4ed/0x7aa<br /> [&lt;ffffffff810380dd&gt;] set_next_entity+0x32/0x55<br /> [&lt;ffffffff810e6969&gt;] alloc_pages_vma+0x12d/0x136<br /> [&lt;ffffffff810de82f&gt;] read_swap_cache_async+0x67/0x142<br /> [&lt;ffffffff810de961&gt;] swapin_readahead+0x57/0x9a<br /> [&lt;ffffffff810d165a&gt;] handle_pte_fault+0x347/0x79f<br /> [&lt;ffffffff810ceb49&gt;] pte_offset_kernel+0x16/0x35<br /> [&lt;ffffffff813533ee&gt;] do_page_fault+0x320/0x345<br /> [&lt;ffffffff810d6a04&gt;] mmap_region+0x353/0x44a<br /> [&lt;ffffffff81350a25&gt;] async_page_fault+0x25/0x30<br /> [&lt;ffffffffffffffff&gt;] 0xffffffffffffffff<br /> &lt;/pre&gt;<br /> 可以看到，基本都是在swap内存，即内存不足。<br /> <br /> 再以mem对top进行排序：<br /> &lt;pre&gt;<br /> top - 12:56:38 up 1:39, 2 users, load average: 101.88, 108.95, 97.38<br /> Tasks: 233 total, 1 running, 232 sleeping, 0 stopped, 0 zombie<br /> %Cpu(s): 14.2 us, 2.2 sy, 0.0 ni, 0.0 id, 83.5 wa, 0.0 hi, 0.2 si, 0.0 st<br /> <br /> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND<br /> 5847 mysql 20 0 351m 36m 2876 D 0.7 1.8 0:00.13 mysqld<br /> 5023 www-data 20 0 187m 25m 3592 S 0.0 1.2 0:02.37 apache2<br /> 5270 www-data 20 0 186m 23m 3552 S 1.0 1.2 0:02.11 apache2<br /> 5592 www-data 20 0 186m 21m 2324 S 0.0 1.1 0:01.28 apache2<br /> 5289 www-data 20 0 184m 21m 3408 D 0.0 1.1 0:02.44 apache2<br /> 5063 www-data 20 0 183m 21m 3780 S 0.3 1.1 0:03.26 apache2<br /> 5299 www-data 20 0 184m 20m 3316 D 0.0 1.0 0:01.88 apache2<br /> 5291 www-data 20 0 247m 20m 3800 S 0.3 1.0 0:02.23 apache2<br /> 5242 www-data 20 0 184m 20m 3316 D 0.0 1.0 0:03.11 apache2<br /> 5269 www-data 20 0 183m 20m 3860 S 0.0 1.0 0:02.45 apache2<br /> 5266 www-data 20 0 183m 20m 3420 D 1.0 1.0 0:01.88 apache2<br /> 5286 www-data 20 0 183m 20m 3420 S 1.3 1.0 0:02.87 apache2<br /> 5232 www-data 20 0 244m 19m 3800 S 0.0 1.0 0:01.92 apache2<br /> 5618 www-data 20 0 186m 19m 3636 S 0.0 1.0 0:00.99 apache2<br /> 5015 www-data 20 0 183m 19m 3800 S 0.0 1.0 0:04.99 apache2<br /> 5301 www-data 20 0 181m 19m 3604 S 0.3 1.0 0:01.89 apache2<br /> 5617 www-data 20 0 183m 19m 3220 D 0.0 1.0 0:00.94 apache2<br /> 5595 www-data 20 0 186m 19m 2028 S 0.0 1.0 0:01.18 apache2<br /> 5254 www-data 20 0 183m 19m 2508 S 0.0 1.0 0:02.11 apache2<br /> 5264 www-data 20 0 181m 18m 3876 S 0.0 0.9 0:03.15 apache2<br /> &lt;/pre&gt;<br /> 可以看到，每个apache进程占用1%左右的内存，而这样的进程有多少个呢？--&gt;150个！<br /> 那内存自然是不够的，所以还是设置一个并发上限，查看apache配置文件：<br /> &lt;pre&gt;<br /> &lt;IfModule mpm_prefork_module&gt;<br /> StartServers 5<br /> MinSpareServers 5<br /> MaxSpareServers 10<br /> MaxClients 150<br /> MaxRequestsPerChild 0<br /> &lt;/IfModule&gt;<br /> &lt;/pre&gt;<br /> 将 MaxClients改为 50，重启。</div> Hovercool