[Twisted-web] Perspective Broker: Max connections?

[Matthieu Huin]

Hello Ilias,

Maybe you are hitting your OS's file descriptor limit ? On Debian it is 
set quite low by default. Here's a bash script excerpt that increases it :

         grep "fs.file-max =" /etc/sysctl.conf > /dev/null 2>&1
         [ "$?" == 0 ] && sed -i "/fs.file-max =.*/d" /etc/sysctl.conf
         echo "fs.file-max = 65535" >> /etc/sysctl.conf

         grep "soft nofile " /etc/security/limits.conf > /dev/null 2>&1
         [ "$?" == 0 ] && sed -i "/soft nofile .*/d" 
/etc/security/limits.conf
         echo "soft nofile 65535" >> /etc/security/limits.conf

         grep "hard nofile " /etc/security/limits.conf > /dev/null 2>&1
         [ "$?" == 0 ] && sed -i "/hard nofile .*/d" 
/etc/security/limits.conf
         echo "hard nofile 65535" >> /etc/security/limits.conf

Proceed at your own risk :)

Matthieu

On 09/06/2011 17:02, Ilias Rinis wrote:
> Greetings *,
>
> I have been using perspective broker for a while, and now I am
> encountering a scalability issue.
>
> I have set up a single pb server; I intend to create a big workload of
> client connections to this server. My server so far is possible to
> accept up to ~55 connections. If I try to push more connections in
> (e.g. 100), I get the following failure:
>
> Unhandled error in Deferred:
> Traceback (most recent call last):
> Failure: twisted.internet.error.ConnectBindError: Couldn't bind: 24:
> Too many open files.
>
> When one of these 55 clients logs out of my server, another one of the
> rest connects. It seems like there is some connection queue and the
> rest are waiting there until some of the first 55 clients exits... Is
> this possible? What could cause this error?
>
> Thank you all for your attention!
>
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