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Posted to users@httpd.apache.org by Arnab Ganguly <ag...@gmail.com> on 2008/03/19 22:11:05 UTC
[users@httpd] Query on Maxmemfree
Hi All,
How do I restrain Apache process to grow to a certain limit?And also when
the process dies how do I make sure it releases the resource it had
acquired.What is the impact of the parameter MaxMemFree ?Any help or
suggestion would be very much appreciated.
Thanks
-A
Re: [users@httpd] Query on Maxmemfree
Posted by Arnab Ganguly <ag...@gmail.com>.
> And also when
> the process dies how do I make sure it releases the resource it had
> acquired.
>>This will happen automatically for most resources. Is there some
>>particular problem you are having?
Thanks for the update.My observation even after using MaxRequestPerChild
param setting to non zero.What I see the process gets killed but there is no
increase in free memory.
Another observation is RSS size of Apache process is around 15MB but free -m
gives much more resource occupied considering only Apache is running in the
particular box.
Regards
-A
On Fri, Mar 21, 2008 at 12:47 AM, Joshua Slive <jo...@slive.ca> wrote:
> On Wed, Mar 19, 2008 at 5:11 PM, Arnab Ganguly <ag...@gmail.com>
> wrote:
> > Hi All,
> > How do I restrain Apache process to grow to a certain limit?
>
> There is no function internal to apache to do that. You can probably
> use ulimit in the script that starts apache. Of course, the processes
> will die very ungracefully if they hit the OS limit.
>
> You may want to look at MaxRequestsPerChild if you have buggy/leaky
> modules.
>
> > And also when
> > the process dies how do I make sure it releases the resource it had
> > acquired.
>
> This will happen automatically for most resources. Is there some
> particular problem you are having?
>
> > What is the impact of the parameter MaxMemFree ?
>
> This won't do very much in normal use. Apache will try to free memory
> back to the OS if it winds up with a bunch of unoccupied memory. The
> OS may or may not reuse it. And in a busy server, it is unlikely that
> particular processes will wind up allocating a bunch of memory and
> then later not need it.
>
> Joshua.
>
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Re: [users@httpd] Query on Maxmemfree
Posted by Joshua Slive <jo...@slive.ca>.
On Wed, Mar 19, 2008 at 5:11 PM, Arnab Ganguly <ag...@gmail.com> wrote:
> Hi All,
> How do I restrain Apache process to grow to a certain limit?
There is no function internal to apache to do that. You can probably
use ulimit in the script that starts apache. Of course, the processes
will die very ungracefully if they hit the OS limit.
You may want to look at MaxRequestsPerChild if you have buggy/leaky modules.
> And also when
> the process dies how do I make sure it releases the resource it had
> acquired.
This will happen automatically for most resources. Is there some
particular problem you are having?
> What is the impact of the parameter MaxMemFree ?
This won't do very much in normal use. Apache will try to free memory
back to the OS if it winds up with a bunch of unoccupied memory. The
OS may or may not reuse it. And in a busy server, it is unlikely that
particular processes will wind up allocating a bunch of memory and
then later not need it.
Joshua.
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