我的网站停止加载浏览器，并重新工作后，我重新启动apache2。
我使用的Amazon AWS ububuntu服务器在3个月前从t2.micro移动到了t2.large（vCPU：2，CPU Credits /小时：36，Mem（GiB）8）。
这是apache2的日志：
[Tue Dec 15 09:04:41.976924 2015] [autoindex:error] [pid 31049] [client 66.66.66.666:53331] AH01276: Cannot serve directory /var/www/html/wp-content/themes/twentyfifteen-child/images/: No matching DirectoryIndex (index.html,index.cgi,index.pl,index.php,index.xhtml,index.htm) found, and server-generated directory index forbidden by Options directive, referer: http://www.example.com/blog/ [Tue Dec 15 18:28:59.565037 2015] [autoindex:error] [pid 31987] [client 50.115.68.210:13697] AH01276: Cannot serve directory /var/www/html/wp-content/themes/twentyfifteen-child/images/: No matching DirectoryIndex (index.html,index.cgi,index.pl,index.php,index.xhtml,index.htm) found, and server-generated directory index forbidden by Options directive, referer: http://www.example.com/wp-content/themes/twentyfifteen-child/style.css?ver=4.3.1 [Wed Dec 16 02:34:52.643069 2015] [mpm_prefork:error] [pid 27704] AH00161: server reached MaxRequestWorkers setting, consider raising the MaxRequestWorkers setting [Wed Dec 16 10:40:04.422974 2015] [core:notice] [pid 27704] AH00051: child pid 28345 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Wed Dec 16 10:40:04.423039 2015] [core:notice] [pid 27704] AH00051: child pid 28512 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Wed Dec 16 10:40:04.423089 2015] [core:notice] [pid 27704] AH00051: child pid 28347 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Wed Dec 16 10:40:04.423174 2015] [core:notice] [pid 27704] AH00051: child pid 27850 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Wed Dec 16 10:40:04.423220 2015] [core:notice] [pid 27704] AH00051: child pid 13545 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Wed Dec 16 10:40:04.423259 2015] [core:notice] [pid 27704] AH00051: child pid 31810 exit signal Segmentation fault (11), possible coredump in /etc/apache2 [Wed Dec 16 10:40:04.423297 2015] [core:notice] [pid 27704] AH00051: child pid 28520 exit signal Segmentation fault (11), possible coredump in /etc/apache2 这个问题真的是在10:40左右开始的（你可以在日志中看到）
这是MaxRequestWorkers 。
<IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxRequestWorkers 256 MaxConnectionsPerChild 1000 </IfModule>
任何人都可以帮我debugging我的服务器上的问题？
可能是什么问题？
编辑：
GBD输出：
(gdb) gdb apache2 -core /tmp/apache-coredumps/core [1]+ Stopped gdb /usr/sbin/apache2 root@ip-66-66-66-66:/# db apache2 -core /tmp/apache-coredumps/core db: command not found root@ip-66-66-66-66:/# gdb apache2 -core /tmp/apache-coredumps/core GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1 Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from apache2...Reading symbols from /usr/lib/debug//usr/sbin/apache2...done. done. [New LWP 6194] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/mysql.so" does not match "/usr/lib/php5/20121212/mysql.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/mysql.so" does not match "/usr/lib/php5/20121212/mysql.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/mysqli.so" does not match "/usr/lib/php5/20121212/mysqli.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/mysqli.so" does not match "/usr/lib/php5/20121212/mysqli.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/pdo_mysql.so" does not match "/usr/lib/php5/20121212/pdo_mysql.so" (CRC mismatch). warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/pdo_mysql.so" does not match "/usr/lib/php5/20121212/pdo_mysql.so" (CRC mismatch). Core was generated by `/usr/sbin/apache2 -k start'. Program terminated with signal SIGSEGV, Segmentation fault. #0 _zend_mm_free_int (heap=0x7f4b910ecfb0, p=0x7f4b910f0e70) at /build/php5-pO28mL/php5-5.5.9+dfsg/Zend/zend_alloc.c:2104 2104 /build/php5-pO28mL/php5-5.5.9+dfsg/Zend/zend_alloc.c: No such file or directory.
你的服务器可能只是有一个简单的过载。 我不能告诉，即使是一个t2.micro，因为它依赖于太多的参数。
有选项来防止这些崩溃。 其中最简单的就是安装Monit 。 这是一个可以监控Apache的服务，如果发现有太多的连接，就重新启动它。 您也可以将Monit用于其他进程。
[core：notice] [pid 27704] AH00051：child pid 28345退出信号分割错误（11），/ etc / apache2中可能的coredump
它看起来像你的应用程序可能有一个错误。 你可以将gdb附加到其中一个进程，等待它再次崩溃，然后从那里获取回溯并工作 。
您可能还想查看其他日志，看是否有任何相关的相关信息可以帮助追踪问题。