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Posted to users@httpd.apache.org by "Rose, John B" <jb...@utk.edu> on 2015/04/07 17:16:16 UTC
[users@httpd] Question about server-status output
I thought the number of positions in server-status Scoreboard output had the same number of positions as the number assigned to your Maxclients/MaxRequestworkers setting.
But I guess it does not based on looking at it more closely/frequently.
I was looking at a web server with a MaxClients of 60, but there were 248 "positions" in the Scoreboard part of server-status.
Although I know I have seen less positions in Scoreboard output.
So what determines the number of positions in that part of the output, and can that be interpreted to mean anything when monitoring your web server?
Thanks
Re: [users@httpd] Question about server-status output
Posted by "Rose, John B" <jb...@utk.edu>.
OK thanks
On 4/7/15 11:31 AM, "Eric Covener" <co...@gmail.com> wrote:
>On Tue, Apr 7, 2015 at 11:26 AM, Rose, John B <jb...@utk.edu> wrote:
>> This particular server is using prefork. So it seems like it would just
>>be
>> the absolute value set in MaxClients. But I guess that isn't the case.
>>So
>> in a prefork config what determines
>> The number of spaces?
>>
>> We have a new 2.4 server we are using "event" MPM. I assume in that case
>> what you said below would apply?
>
>
>I think in that case it's extra space for ServerLimit > MaxClients.
>For worker and event, add ThreadLimit as a multiplier.
>
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Re: [users@httpd] Question about server-status output
Posted by Eric Covener <co...@gmail.com>.
On Tue, Apr 7, 2015 at 11:42 AM, Rose, John B <jb...@utk.edu> wrote:
> So if Maxclients is less than 256 then ServerLimit is not set. In that
> case ServerLimit defaults to 256? Therefore there should always be at
> least 256 spots there, unless for some reason you set ServerLimit lower
> than 256. Which you should not do? I am pretty sure I have seen much less
> than 256 spots there somewhere along the line on some Apache server.
>
> So the number of positions is whatever the largest value is of MaxClients
> or ServerLimit if prefork. Or largest of MaxClients/MaxRequestWorkers or
> ServerLimit*ThreadLimit if threaded MPM?
Yes, the compiled-in default for ServerLimit in prefork is 256.
A low ServerLimit*ThreadLimit will cap what values httpd will let you
configure for MaxClients, as opposed to silently boosting. There
are some elaborate messages that complain hen the relationship between
them is wrong and it will lower your MaxClients.
--
Eric Covener
covener@gmail.com
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Re: [users@httpd] Question about server-status output
Posted by "Rose, John B" <jb...@utk.edu>.
So if Maxclients is less than 256 then ServerLimit is not set. In that
case ServerLimit defaults to 256? Therefore there should always be at
least 256 spots there, unless for some reason you set ServerLimit lower
than 256. Which you should not do? I am pretty sure I have seen much less
than 256 spots there somewhere along the line on some Apache server.
So the number of positions is whatever the largest value is of MaxClients
or ServerLimit if prefork. Or largest of MaxClients/MaxRequestWorkers or
ServerLimit*ThreadLimit if threaded MPM?
On 4/7/15 11:31 AM, "Eric Covener" <co...@gmail.com> wrote:
>On Tue, Apr 7, 2015 at 11:26 AM, Rose, John B <jb...@utk.edu> wrote:
>> This particular server is using prefork. So it seems like it would just
>>be
>> the absolute value set in MaxClients. But I guess that isn't the case.
>>So
>> in a prefork config what determines
>> The number of spaces?
>>
>> We have a new 2.4 server we are using "event" MPM. I assume in that case
>> what you said below would apply?
>
>
>I think in that case it's extra space for ServerLimit > MaxClients.
>For worker and event, add ThreadLimit as a multiplier.
>
>---------------------------------------------------------------------
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>For additional commands, e-mail: users-help@httpd.apache.org
>
---------------------------------------------------------------------
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Re: [users@httpd] Question about server-status output
Posted by Eric Covener <co...@gmail.com>.
On Tue, Apr 7, 2015 at 11:26 AM, Rose, John B <jb...@utk.edu> wrote:
> This particular server is using prefork. So it seems like it would just be
> the absolute value set in MaxClients. But I guess that isn't the case. So
> in a prefork config what determines
> The number of spaces?
>
> We have a new 2.4 server we are using "event" MPM. I assume in that case
> what you said below would apply?
I think in that case it's extra space for ServerLimit > MaxClients.
For worker and event, add ThreadLimit as a multiplier.
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Re: [users@httpd] Question about server-status output
Posted by "Rose, John B" <jb...@utk.edu>.
This particular server is using prefork. So it seems like it would just be
the absolute value set in MaxClients. But I guess that isn't the case. So
in a prefork config what determines
The number of spaces?
We have a new 2.4 server we are using "event" MPM. I assume in that case
what you said below would apply?
Thanks
On 4/7/15 11:19 AM, "Eric Covener" <co...@gmail.com> wrote:
>On Tue, Apr 7, 2015 at 11:16 AM, Rose, John B <jb...@utk.edu> wrote:
>> So what determines the number of positions in that part of the output,
>>and
>> can that be interpreted to mean anything when monitoring your web
>>server?
>
>There are spaces to grow into if ServerLimit*ThreadLimit > MaxClients.
>Is that what you're seeing?
>
>
>--
>Eric Covener
>covener@gmail.com
>
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Re: [users@httpd] Question about server-status output
Posted by Eric Covener <co...@gmail.com>.
On Tue, Apr 7, 2015 at 11:16 AM, Rose, John B <jb...@utk.edu> wrote:
> So what determines the number of positions in that part of the output, and
> can that be interpreted to mean anything when monitoring your web server?
There are spaces to grow into if ServerLimit*ThreadLimit > MaxClients.
Is that what you're seeing?
--
Eric Covener
covener@gmail.com
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