Hello,

the workload is split between the processes created due to param timer_procs>1. If timer_procs=0, is the primary timer that takes care of checking for and cleaning expired records.

If timer_procs=1, then a dedicated timer process is created by usrloc and this timer process is doing the cleanup job for all location records. If timer_procs>1, then the workload is split among those processes, each process gets assigned a list of slots from the internal hash table storing the location records and they do cleanup on those slots.

Cheers,
Daniel

Thanks, Henning.

But I thought Joel’s question about multiple processes was interesting. Is the workload somehow split up among them? If not, why have multiple ones?

—

Sent from my iPad

On Feb 20, 2020, at 2:00 AM, Henning Westerholt <hw@skalatan.de> wrote:



Hi Joel,

 

$ root@proxy-1:~# kamcmd ps |grep second

31314   secondary timer

 

Basically it makes sense to use a dedicated timer if you have a large DB and/or a DB which is not particularly fast for the expiration, to not block the core timer to long.

 

Cheers,

 

Henning

 

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

 

From: sr-users <sr-users-bounces@lists.kamailio.org> On Behalf Of Joel Serrano
Sent: Thursday, February 20, 2020 1:12 AM
To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: [SR-Users] Understanding some usrloc modparams

 

Hello,

 

I have an installation using usrloc + db_mode=1.

 

If I want on db_mode=1 or db_mode=2 the expired contacts to be cleaned up I have to enable the modparam db_timer_clean:

 

https://www.kamailio.org/docs/modules/devel/modules/usrloc.html#usrloc.p.db_timer_clean

 

The docs say:

 

"Enable (1) or disable (0) cleaning of expired db records on timer basis for db_mode WRITE-BACK and WRITE-THROUGH. It uses the secondary timer process."

 

I have the following doubts:

 

1- What does the reference "it uses the secondary timer process" mean? Is there a specific secondary timer just for this purpose?

2- Is  #1 related to the modparam timer_procs? (so it uses one of those when enabled?)

3- Why/When would you need a timer_proces modparam with a value higher than "1"? 

 

 

Thanks, 

Joel.

 

 

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