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From Justin Pasher <>
Subject Re: [users@httpd] Apache intermittent crash - HELP!!!
Date Fri, 18 Dec 2009 21:20:09 GMT
Just a couple things to point out (but nothing specific to fixing your 
probem) ...

gary lim wrote:
> Hi Daniel,
> After performance tuning of apache, the mem usage is now more 
> managable. However, the apache still experience intermittent crash 
> which we suspect is due to certain PHP module running in our joomla 
> website.

If it really is the PHP module that is crashing it, there's really no 
other way to test that theory unless you disable it and see if the 
crashes persist.

> *top output
> *top - 04:58:52 up 160 days,  4:02,  1 user,  load average: 0.08, 
> 0.04, 0.05
> Tasks:  69 total,   2 running,  67 sleeping,   0 stopped,   0 zombie
> Cpu(s):  1.9% us,  5.0% sy,  0.0% ni, 93.2% id,  0.0% wa,  0.0% hi,  
> 0.0% si
> Mem:    917652k total,   908144k used,     9508k free,    32660k buffers
> Swap:  1048568k total,    37856k used,  1010712k free,   179480k cached
> Model: *Dell PowerEdge 850*
> CPU:Intel *Pentium IV 3.0GHz* / 2MB, 800MHz FSB
> RAM: *2GB **DDR-2 SDRAM* 533MHz w/ ECC*
> *Harddisk: *02 x SATA* (7200RPM) HDD (non-RAID)

Not sure if you noticed or not, but all of your memory is not actually 
showing up as available to the kernel. Are you running a kernel with 
"bigmem"-style support? If not, you're missing out on half of your RAM.

> *Apache Version
> *Server version: Apache/2.0.58
> Server built:   Dec 12 2006 21:41:17

There is always the 2.2 branch, which I'd recommend trying out if 
possible. Perhaps this is a locked down distro release with only the 
older version available (RHEL/CentOS?).

Justin Pasher

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