oversized httpd process?
Dan Nelson
dnelson at allantgroup.com
Wed Aug 24 14:31:35 GMT 2005
In the last episode (Aug 24), Lei Sun said:
> I saw many posts from google regarding to this question, but there
> were no definite answers..
>
> some say, it's mod_ssl, some say it's mod_perl, some say it is mm.
> But my case, it just doesn't make much sence to me at all.
>
> Here are the 2 test machines that I have, both have the exact same
> configuration
>
> A is a lot more powerful than B
>
> machine A, p4 3.0 2GB Mem
> machine B, p2 450Mhz 128MB Mem
>
> Both have mod_php, mod_ssl, and no traffic has been sent.
>
> Looking at the httpd sizes, I start to wonder ... How come Machine B
> only uses around 15Mb per httpd, while machine A takes 155Mb, and
> while they have exactly the same software, same configuration.
Try running lsof on both processes. Since SIZE is 155M but RES is a
lot smaller, there may be a large file being mmapped by one system and
not the other.
> machine A:
> PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND
> 440 root 96 0 155M 17412K select 0 0:02 0.00% 0.00% httpd
>
> machine B:
> PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
> 50855 www 20 0 16348K 12K lockf 0:00 0.00% 0.00% httpd
--
Dan Nelson
dnelson at allantgroup.com
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