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
On 20.02.20 08:50, Alex Balashov wrote:
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 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_...
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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