On Mon, 12 May 2008 21:36:20 +0100
Stargazer <stargazer@xxxxxxxxxxxxxxxx> wrote:
> Hi list, I have a RH server using Plesk with Apache 2.0.54. I can't
> upgrade Apache via yum and am very reluctant to try manually
> installing a newer version in case it breaks Plesk. The server hosts
> about 60 domains and needed a daily restart due to it eating all the memory
> then swap, which actually did report a zero free value. After lots of
> investigaton I have found this bash script frees up the swap:
>
> ipcs -s | grep apache | perl -e 'while (<STDIN>) { @a=split(/\s+/);
> print `ipcrm sem $a[1]`}'
> service httpd restart
This sounds more like a HACK, rather than a solution.
> The server has 750M Physical RAM. httpd.conf is the default apart from
> whatever Plesk does to it. When I'm low on swap top shows nothing
> obvious in that
> theres no single process using the memory, there are usually about 8
> httpd children
> using about 2% each.
750/8 ~ 93M each... that's awfully lot for a httpd child.
Are you sure you're not leaking memory anywhere?
Setting
http://httpd.apache.org/docs/2.0/mod/mpm_common.html#maxrequestsperchild
back to default (usually it's set to 0 == infinite), might show if it's
leaking or not.
Also take a look at http://httpd.apache.org/docs/2.0/misc/perf-tuning.html
> I'm really looking for help fixing this, if anyone can I'd be really
> grateful -
> just ask for whatever logs are needed.
If this doesn't help you, you might want to supply your MPM configuration,
also a listing of the used modules would be a good.
> Thanks!
>
> - John
So long,
Igor
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