Re: 32 & 64 bit memory differences

["Mark Maunder" <suppressed>]

Gary,

FWIW I run dual core 64 bit opterons on 3 machines with Fedora 6 64-bit and haven't had any memory discrepancies between my live 64 bit machines and my dev 32 bit environment. I use the stock httpd.prefork
 that comes with Fedora 6 with mod_perl loaded as a DSO. 

Regards,

Mark.

On Nov 2, 2007 7:47 AM, Gary Sewell <suppressed > wrote:

Hi,

 

I have a couple of questions I'm hoping we can get a little help with…

 

Firstly, we are running a mod_perl application on 4 separate servers due to its bulkiness.

 

2 x 32-bit servers (Debian 32-bit) with 4Gb RAM each

2 x 64-bit servers (Debian 64-bit) with 8Gb RAM each

 

We have found each apache instance is almost double on the 64-bit servers

 

Example 64-bit

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND

www-data  9950  2.4  1.7 210324 141744 ?       S    14:26   0:11  \_ /usr/sbin/apache-perl

 

Example 32-bit

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND

www-data  2336  0.0  2.7 117100 105908 ?       S    15:14   0:16  \_ /usr/sbin/apache-perl

 

Is this something we just put up with or have we done something drastically wrong?

Is it worth installing a 32-bit distribution on the 64-bit processors? Will the 8Gb RAM cause problems as 32-bit distributions if we did this?

 

Apache is the standard install for each distribution with a few added modules.

 

Secondly,

How can I get a split/rundown of what is taking up so much memory for each apache instance, 100Mb is a lot, let alone 200Mb on the 64 bit servers. I'm sure we are going wrong somewhere.

 

 

Many Thanks.

GS

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Mark Maunder <suppressed>
http://markmaunder.com/
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