[Kamailio-Users] ERROR:mysql:db_mysql_new_connection: driver error: Too many connections

[Samael -]

Thanks for your response.

We realized that with 200 children the problem is still happing.

We are using db ( MySQL 5 ) in every request in the config file through the
following modules:

    - lcr: to check every request where come from

    - dispatcher: to make load balancing with a pool of asterisk in cluster

    - avpsops: to use some user preferences

    - carrieroute: to balance outbound calls to several providers

Is this a high load of db transactions to the openser?

Regards


2008/9/3 Ovidiu Sas <osas at voipembedded.com>

> Increasing the number of children to 200 will not help.
> Most likely, your config is doing something 'wrong' or being terribly
> intensive on mysql db.
> Openser is very light and it can handle lot's of transaction, but if
> you are using a slow db and you are doing db queries during your
> transaction processing, then your server will be slow.
>
> Check your config and see what's going 'wrong' there.
>
> As a reference, openser is able to do 150 cps using a single child and
> the CPU is barely utilized (on a slow machine).
>
>
> Regards,
> Ovidiu Sas
>
> On Wed, Sep 3, 2008 at 10:31 AM, Samael - <samael.zgz at gmail.com> wrote:
> > Hi,
> >
> >
> >
> > We are deploying OpenSER in a large infrastructure together with Asterisk
> to
> > support thousands of current transactions.
> >
> > We are using udp listener and mysql module in openser.
> >
> >
> >
> > We had to increase the children parameter of the openser.cfg to 200
> because
> > Openser couldn't handle the high amount of concurrent SIP REQUESTs from
> > ASTERISK (Not only INVITES, but also a lot of SIP OPTIONs), that means
> that
> > Openser couldn't handle more than 'children' REQUEST loosing the rest of
> the
> > concurrent REQUEST.
> >
> > children=200
> >
> >
> >
> > But then, the following error appeared in the openser:
> >
> > ERROR:mysql:db_mysql_new_connection: driver error: Too many connections
> >
> >
> >
> > This is because the Standard parameter of mysql "max_connections" is set
> to
> > 100.
> >
> >
> >
> > In mysql CLI, we can see that every child process of openser has a mysql
> > connection. (see in Mysql> SHOW PROCESSLIST)
> >
> >
> >
> > The recommended max_connections parameter is 500-1000 => we have a limit
> of
> > 500-1000 concurrent SIP REQUEST to be processed by the openser.
> >
> >
> >
> > Why there is a process for every child?
> >
> >
> >
> > Why is neccesary a mysql connection for every child?
> >
> > Can the openser have a pool of mysql connection to be used by thousands
> of
> > children?
> >
> > Regards
> >
> > _______________________________________________
> > Users mailing list
> > Users at lists.kamailio.org
> > http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
> >
> >
>
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