[OpenSIPS-Users] opensips mysql database connectivity

Liviu Chircu liviu at opensips.org
Tue Jul 5 18:54:04 CEST 2016

Hi Owais,

OpenSIPS will create 1 blocking SQL DB connection per worker, per 
different backend, per unique DB URL. Should this connection be lost 
during runtime, it will attempt X retries (usually 3), before returning 
an error for the query. There is no need for more than 1 connection for 
each worker as it will run every query sequentially.

Starting with OpenSIPS 2.1, if you use async MySQL queries, then every 
worker will open, at most, a pool of "db_max_async_connections" [1] 
connections with every backend and unique DB URL, based on how many 
concurrent queries it needs to perform over there. The connections in 
the async pool are always reused, and the pool may grow if there is 
demand for it.

[1] http://www.opensips.org/Documentation/Script-CoreParameters-2-3#toc39

Liviu Chircu
OpenSIPS Developer

On 04.07.2016 08:03, Owais Ahmad wrote:
> Does OpenSIPS offer DB connection pooling?
> On Fri, Jul 1, 2016 at 10:11 PM, Owais Ahmad <millennium.bug at gmail.com 
> <mailto:millennium.bug at gmail.com>> wrote:
>     Hello all,
>     I
>     ​ am using db_mysql module on opensips version 2.1.3
>     Is there a way to limit the number of db connections that opensips
>     initializes with?
>     Also, how can we make non-persistent connections mysql connections
>     with opensips?​
>     Regards,
>     Owais
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
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