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Date: Wed, 24 Aug 2005 09:31:33 -0500
From: Dan Nelson <dnelson@allantgroup.com>
To: Lei Sun <lei.sun@gmail.com>
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Cc: questions@freebsd.org
Subject: Re: oversized httpd process?
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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@allantgroup.com