Hi,
To be clear, the config snippet I posted below was from the "vanilla" Apache I built from source.
When I encounter the errors, I am seeing the "connection refused" errors from Jmeter (the client/load tester). I don't seem to see errors per se, in the Apache logs, but, puzzlingly, I do see messages AH00162 messages in the error log, saying that that the server "dseems busy" and indicating that more children are being spawned.
What I mean by "puzzlingly" is that I now have the Apache configured to start 600+ processes, so in those AH00162 it is showing 600+ total children, but my Jmeter is configured to only run 500 threads. In other words, it seems like there should only be like 500 active requests at any given time, and there seem to already be > 500 children (even if I subtract idle from total children) so why is Apache spawning even more children?
Thanks,
Jim
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On Tue, 11/17/15, Daniel <dferradal@xxxxxxxxx> wrote:
Subject: Re: Getting "connection refused" Apache 2.4
To: "o haya" <ohaya@xxxxxxxxx>, "Yann Ylavic" <ylavic.dev@xxxxxxxxx>, "users@xxxxxxxxxxxxxxxx" <users@xxxxxxxxxxxxxxxx>
Date: Tuesday, November 17, 2015, 11:59 AM
I
always recommend to specify a fixed ServerLimit Value, if
you have 500 processes but you allow 150 clients, I think
you are just filling a backlog of connections which are not
attended until you get to a limit of backlogged
connections.
Do you
have specific errors in apache? Check the server config
context error log first.
Also later if you have correctly
configured your mpm for the amount of real clients you will
have, it is worth a try to check ulimit values
"ulimit -a" for root. Also consider if you start apache
using "sudo", your ulimit values will be used
instead of root's.
El mar., 17
nov. 2015 a las 2:10, o haya
(<ohaya@xxxxxxxxx.invalid>) escribió:
This
is what is in the
extra/httpd-mpm.conf:
# prefork MPM#
StartServers: number of server processes to
start# MinSpareServers: minimum number of server
processes which are kept spare# MaxSpareServers:
maximum number of server processes which are kept
spare# MaxClients: maximum number of server
processes allowed to start# MaxRequestsPerChild:
maximum number of requests a server process
serves<IfModule
mpm_prefork_module> StartServers
5 MinSpareServers
5 MaxSpareServers 10
MaxClients 150
MaxRequestsPerChild
0</IfModule>
From: Yann
Ylavic <ylavic.dev@xxxxxxxxx>
To: users@xxxxxxxxxxxxxxxx;
o haya <ohaya@xxxxxxxxx>
Sent: Monday, November
16, 2015 7:57
PM
Subject: Re:
Getting "connection refused" Apache
2.4
On Tue, Nov 17, 2015 at 1:11 AM, Yann Ylavic
<ylavic.dev@xxxxxxxxx>
wrote:
> On Tue, Nov 17, 2015 at 12:23 AM, o haya
<ohaya@xxxxxxxxx.invalid>
wrote:
>>
>>
This is with the as-built Apache configuration settings
(i.e., I haven't
>> tried tweaking
them).
>
> Please
share your settings for [...]
>
MaxSpareThreads, MinSpareThreads [...]
I meant MaxSpareServers and
MinSpareServers here, *Threads are not
relevant for prefork.
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