problems with connection pooling

Alan DeKok aland at
Tue Jun 22 13:37:41 CEST 2021

On Jun 22, 2021, at 3:22 AM, Alen via Freeradius-Users <freeradius-users at> wrote:
> We have setup a freeradius server (3.0.21) that connects to Pgbouncer/Postgres database.
> Every time the NAS connects to the freeradius server, 3-4 new connections are opened up


> in the database until it runs out and stalls. Does Freeradius use some sort of connection pooling?

  If only there was some kind of debug output where you could see what the server was doing.

  If only the configuration files were text, so you could see what kind of connection pool was being used by the SQL module.

  Oh well.  It's a mystery.

> I have a suspicion that could be related to the thread pool as defined below:
> radiusd.conf:
> thread pool {
> start_servers = 5
> max_servers = 32
> min_spare_servers = 3
> max_spare_servers = 10
> max_requests_per_server = 0
> auto_limit_acct = no
> }
> 1) Is there somewhere I can make Freeradius reuse existing connections instead of creating new connections whenever the NAS connects to it?

  FreeRADIUS doesn't open up new connections every time it gets a packet from the NAS.

> 2) Can the number of connections created by Freeradius be controlled in any config?

  If you actually read the documentation and configuration files you're editing, yes.

  Alan DeKok.

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