[SR-Users] Question about suspected memory leak presence module

Henning Westerholt hw at skalatan.de
Sat Sep 11 22:22:07 CEST 2021


the output below indicates the memory allocated in the individual functions. So it seems that the mem_copy_subs_noc() function allocates a lot of memory. It is increasing over time? The final output looks like a wrapping error, the counter goes negative.

Which version of Kamailio do you use on the server?



Henning Westerholt – https://skalatan.de/blog/
Kamailio services – https://gilawa.com<https://gilawa.com/>

From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of Albert Petit
Sent: Thursday, September 9, 2021 11:42 PM
To: SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List <sr-users at lists.sip-router.org>
Subject: [SR-Users] Question about suspected memory leak presence module


I am suspecitng presence module might be having a memory leak on a production server used by an end user (not have access to it).

The output of command kamcmd mod.stats presence shm is
Module: presence
        mem_copy_subs(148): 25720
        mem_copy_subs_noc(214): 1672201904
        mem_copy_subs_noc(251): 678406560
        add_event(181): 88
        shm_copy_event(57): 40
        shm_copy_event(50): 312
        add_event(156): 40
        add_event(149): 456
        new_shtable(66): 5767168
        new_shtable(53): 262144
        init_evlist(289): 16
        Total: -1938302848

I am not sure what mem_copy_subs_noc is meaning. And final output is negative,  SHM is incfreasing all the time but not sure of the root cause

is this a reasonable hint that a memory leak is related to presence?
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