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This is by design. When you have many thousands of presence subscriptions you need to service them evenly across time instead of in big lumps.<BR>
<BR>
If you don't want this behaviour then you can set the notifier_processes modparam to 0. But, if you do this you should consider not using subs_db_mode 3 as there are many race-hazards in presence that are fixed by using the notifier_processes.<BR>
<BR>
Regards,<BR>
<BR>
Peter<BR>
<BR>
On Fri, 2012-11-09 at 12:01 +0100, Andrew Pogrebennyk wrote:
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Hi,
when presence module is running with subs_db_mode=3 it makes an
excessive number of SQL select queries, litelly dozens per second:
> 25232 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=64 AND event<>'presence.winfo'
> 25233 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=116 AND event<>'presence.winfo'
> 25233 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=116 AND event='presence.winfo'
> 25232 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=64 AND event='presence.winfo'
> 25231 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=14 AND event<>'presence.winfo'
> 25231 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=14 AND event='presence.winfo'
> 25233 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=118 AND event<>'presence.winfo'
> 25232 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=66 AND event<>'presence.winfo'
> 25233 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=118 AND event='presence.winfo'
> 25232 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=66 AND event='presence.winfo'
> 25231 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=16 AND event<>'presence.winfo'
> 25231 Query select presentity_uri,callid,to_tag,from_tag,event from active_watchers where updated=16 AND event='presence.winfo'
Steps to reproduce: registers two subscribers in jitsi and add them to
contact lists of each other.
The kamailio version is 3.3.2. I'm not doing anything special
configuration-wise:
loadmodule "presence.so"
modparam("presence", "db_url", "mysql://kamailio:snbF93@localhost/kamailio")
# in 3.3 the fallback2db change to subs_db_mode
modparam("presence", "subs_db_mode", 3)
modparam("presence", "notifier_processes", 3)
loadmodule "presence_xml.so"
modparam("presence_xml", "db_url",
"mysql://kamailio:snbF93@localhost/kamailio")
modparam("presence_xml", "force_active", 0)
modparam("presence_xml", "integrated_xcap_server", 1)
# retry-after 5 minutes
modparam("presence_xml", "xcapauth_userdel_reason",
"probation;retry-after=300")
Q: it is a bug of a feature? :)
Thanks.
Andrew
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--
Peter Dunkley
Technical Director
Crocodile RCS Ltd
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