I just noticed that your error log shows: [Tue Dec 15 13:04:22 2009] [error] server reached MaxClients setting, consider raising the MaxClients setting
so try adjusting your MaxClient setting and your prefork settings. ( http://httpd.apache.org/docs/2.0/mod/prefork.html) I'm not an expert on tuning those settings, but I'm sure someone else here could help you. 2009/12/16 Rodrigo Aliste P. <rali...@gmail.com> > Gary: > > The same thing happened to one of my servers. After long research I got to > the conclusion that the problem was caused by the XCache module. If you have > it, try to disable it. > > > Rodrigo > > 2009/12/16 gary lim <garylim...@gmail.com> > > Hi, >> >> 1. Unfortunately, our website depend heavily on PHP to operate, so it not >> possible for us to disable it. We also highly suspect that the crash is >> related to one of our php module because we are running a lot of Joomla >> component. >> >> 2. unfortunately, we are unable to track which module is causing this >> issue. Any idea how we can check which script is causing the problem because >> this has been going on for weeks and we are still unable to determine the >> source. >> >> 3. Kindly advise how we can perform the migration of our existing codebase >> to FastCGI/SCGI without breaking the current website? >> >> >> rgds >> >> >> On Thu, Dec 17, 2009 at 12:28 AM, Tom Evans <tevans...@googlemail.com>wrote: >> >>> On Wed, Dec 16, 2009 at 4:20 PM, gary lim <garylim...@gmail.com> wrote: >>> > >>> > Dear all, >>> > >>> > 1. I'm using Linux 2.6.16.29 and running on i686 Intel(R) Pentium(R) 4 >>> CPU 3.00GHz GNU/Linux >>> > 2. The below info are my machine config and log output >>> > 3. Kindly advise how to resolve intermittent apache crash even after >>> performance tuning >>> > >>> > httpd.conf output >>> > # prefork MPM [DEFAULT IF USE=-threads] >>> > # StartServers: number of server processes to start >>> > # MinSpareServers: minimum number of server processes which are kept >>> spare >>> > # MaxSpareServers: maximum number of server processes which are kept >>> spare >>> > # MaxClients: maximum number of server processes allowed to start >>> > # MaxRequestsPerChild: maximum number of requests a server process >>> serves >>> > <IfModule prefork.c> >>> > StartServers 2 >>> > MinSpareServers 4 >>> > MaxSpareServers 6 >>> > MaxClients 100 >>> > MaxRequestsPerChild 500 >>> > </IfModule> >>> > >>> > # worker MPM [DEFAULT IF USE=threads] >>> > # StartServers: initial number of server processes to start >>> > # MaxClients: maximum number of simultaneous client connections >>> > # MinSpareThreads: minimum number of worker threads which are kept >>> spare >>> > # MaxSpareThreads: maximum number of worker threads which are kept >>> spare >>> > # ThreadsPerChild: constant number of worker threads in each server >>> process >>> > # MaxRequestsPerChild: maximum number of requests a server process >>> serves >>> > <IfModule worker.c> >>> > StartServers 2 >>> > MaxClients 100 >>> > MinSpareThreads 25 >>> > MaxSpareThreads 75 >>> > ThreadsPerChild 25 >>> > MaxRequestsPerChild 500 >>> > </IfModule> >>> > >>> > >>> > >>> > top output >>> > top - 00:09:00 up 157 days, 23:12, 2 users, load average: 0.67, 0.85, >>> 0.80 >>> > Tasks: 47 total, 1 running, 46 sleeping, 0 stopped, 0 zombie >>> > Cpu(s): 8.3% us, 1.4% sy, 0.0% ni, 88.0% id, 2.2% wa, 0.0% hi, >>> 0.0% si >>> > Mem: 917652k total, 858880k used, 58772k free, 142820k >>> buffers >>> > Swap: 1048568k total, 37844k used, 1010724k free, 434476k cached >>> > >>> > apache2 error log >>> > *** glibc detected *** /usr/sbin/apache2: double free or corruption >>> (fasttop): 0x08b4faf0 *** >>> > [Tue Dec 15 13:04:22 2009] [error] server reached MaxClients setting, >>> consider raising the MaxClients setting >>> > *** glibc detected *** /usr/sbin/apache2: double free or corruption >>> (fasttop): 0x086a1170 *** >>> > *** glibc detected *** /usr/sbin/apache2: double free or corruption >>> (fasttop): 0x08b48c08 *** >>> > [Wed Dec 16 23:53:07 2009] [warn] child process 1325 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:07 2009] [warn] child process 19910 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:07 2009] [warn] child process 10569 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:07 2009] [warn] child process 16964 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:07 2009] [warn] child process 19718 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:09 2009] [warn] child process 1325 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:09 2009] [warn] child process 19910 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:09 2009] [warn] child process 10569 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:09 2009] [warn] child process 16964 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:09 2009] [warn] child process 19718 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:11 2009] [warn] child process 1325 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:11 2009] [warn] child process 19910 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:11 2009] [warn] child process 10569 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:11 2009] [warn] child process 16964 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:11 2009] [warn] child process 19718 still did not >>> exit, sending a SIGTERM >>> > [Wed Dec 16 23:53:13 2009] [error] child process 1325 still did not >>> exit, sending a SIGKILL >>> > [Wed Dec 16 23:53:13 2009] [error] child process 19910 still did not >>> exit, sending a SIGKILL >>> > [Wed Dec 16 23:53:13 2009] [error] child process 10569 still did not >>> exit, sending a SIGKILL >>> > [Wed Dec 16 23:53:13 2009] [error] child process 16964 still did not >>> exit, sending a SIGKILL >>> > >>> > >>> > Joomla / PHP / Apache >>> > System Information >>> > PHP built On: Linux trillian 2.6.16.29-ab1-xenU #1 SMP Sat Sep 23 >>> 19:20:15 SGT 2006 i686 >>> > Database Version: 5.0.24a-log >>> > PHP Version: 5.1.6-pl4-gentoo >>> > Web Server: Apache >>> > WebServer to PHP interface: apache2handler >>> > Joomla! Version: Joomla! 1.0.15 Stable [ Daytime ] 22 February 2008 >>> 23:00 UTC >>> > User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; >>> rv:1.9.0.15) Gecko/2009101601 Firefox/3.0.15 (.NET CLR 3.5.30729) >>> > >>> > Mysql >>> > mysql Ver 14.12 Distrib 5.0.24a, for pc-linux-gnu (i686) using >>> readline 5.1 >>> > >>> >>> Does it work if you disable PHP? Does it still exhibit problems if you >>> run PHP out of process, eg using fastcgi or scgi (can PHP talk SCGI?). >>> For my money, the double free()s are coming from PHP or a PHP module. >>> >>> Cheers >>> >>> Tom >>> >>> --------------------------------------------------------------------- >>> The official User-To-User support forum of the Apache HTTP Server >>> Project. >>> See <URL:http://httpd.apache.org/userslist.html> for more info. >>> To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org >>> " from the digest: users-digest-unsubscr...@httpd.apache.org >>> For additional commands, e-mail: users-h...@httpd.apache.org >>> >>> >> > > > -- > Rodrigo Aliste P. > > -- Rodrigo Aliste P.
