You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@httpd.apache.org by Austin Gonyou <au...@coremetrics.com> on 2003/08/06 19:33:36 UTC
httpd 1.3 running processes mem usage
If I have a Linux server using httpd 1.3 and has 1GB ram and has 1012
httpd processes. When I look at that process's ram stats, I have a
vmSize of say 7032KB, vmRSS of 2056KB, and vmEXE of 2072KB.
Is the size I'm most concerned with when looking at per/process memory
utilization going to be vmSize? We're trying to tune our servers a bit
better until we're ready to move to httpd2, which will sometime at the
beginning of 2004. But help around this diagnosis would be appreciated.
TIA.
--
Austin Gonyou <au...@coremetrics.com>
Coremetrics, Inc.
Re: httpd 1.3 running processes mem usage
Posted by Austin Gonyou <au...@coremetrics.com>.
Thanks so much. We've got much less confusion about this now. Good link,
btw.
On Wed, 2003-08-06 at 13:07, Justin Erenkrantz wrote:
[...]
> Linux uses optimistic memory allocation. Therefore, vmSize will be
> what has
> been asked for, but may not be allocated (or is swapped to disk).
> vmEXE will
> most likely be shared across all of the httpd processes (copy on
> write).
>
> I'd be most concerned about vmRSS which is the resident memory size -
> it is
> how much is in physical memory.
>
> "I Feel Lucky" on "RSS memory size" yields:
>
> <https://www.redhat.com/archives/redhat-list/2002-February/msg01128.html>
>
> That has a bit more information. -- justin
--
Austin Gonyou <au...@coremetrics.com>
Coremetrics, Inc.
Re: httpd 1.3 running processes mem usage
Posted by Justin Erenkrantz <ju...@erenkrantz.com>.
--On Wednesday, August 6, 2003 12:33 PM -0500 Austin Gonyou
<au...@coremetrics.com> wrote:
> If I have a Linux server using httpd 1.3 and has 1GB ram and has 1012
> httpd processes. When I look at that process's ram stats, I have a
> vmSize of say 7032KB, vmRSS of 2056KB, and vmEXE of 2072KB.
>
> Is the size I'm most concerned with when looking at per/process memory
> utilization going to be vmSize? We're trying to tune our servers a bit
> better until we're ready to move to httpd2, which will sometime at the
> beginning of 2004. But help around this diagnosis would be appreciated.
Linux uses optimistic memory allocation. Therefore, vmSize will be what has
been asked for, but may not be allocated (or is swapped to disk). vmEXE will
most likely be shared across all of the httpd processes (copy on write).
I'd be most concerned about vmRSS which is the resident memory size - it is
how much is in physical memory.
"I Feel Lucky" on "RSS memory size" yields:
<https://www.redhat.com/archives/redhat-list/2002-February/msg01128.html>
That has a bit more information. -- justin
Re: httpd 1.3 running processes mem usage
Posted by Aaron Bannert <aa...@clove.org>.
On Wednesday, August 6, 2003, at 10:33 AM, Austin Gonyou wrote:
> If I have a Linux server using httpd 1.3 and has 1GB ram and has 1012
> httpd processes. When I look at that process's ram stats, I have a
> vmSize of say 7032KB, vmRSS of 2056KB, and vmEXE of 2072KB.
>
> Is the size I'm most concerned with when looking at per/process memory
> utilization going to be vmSize? We're trying to tune our servers a bit
> better until we're ready to move to httpd2, which will sometime at the
> beginning of 2004. But help around this diagnosis would be appreciated.
This is one of the main features of httpd-2.0's worker MPM. That is,
significantly reduced memory usage. It is likely that when you switch
to 2.0 you'll see an order of magnitude reduction is memory usage for
the same number of concurrent requests.
-aaron