[SR-Users] Kamailio 4.0.4 slow memory leak

Heenan, Timothy Steven Timothy.Heenan at windstream.com
Thu Sep 11 18:03:53 CEST 2014

Thanks for your help Daniel!


From: Daniel-Constantin Mierla [mailto:miconda at gmail.com]
Sent: Thursday, September 11, 2014 9:59 AM
To: Heenan, Timothy Steven; Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] Kamailio 4.0.4 slow memory leak

Short note to say that last log you sent had more leads, and apparently there is a leak at least in 4.0.

I need a bit more time to look at it and check if still on master and 4.1 (hopefully event later today) - I will come back with an update about it soon.

On 08/09/14 18:11, Daniel-Constantin Mierla wrote:
Were you taking the memory logs after the errors, before restarting?

I didn't get the chance to look over the previous email, I will do it soon.

On 08/09/14 17:48, Heenan, Timothy Steven wrote:
After restarting Kamailio on September 3rd, the problem has again gotten to the point of no call processing.

Here are the memory statistics; additionally, I can see the virtual memory has ballooned up to 400mb again.

shmem:fragments = 2378
shmem:free_size = 209840
shmem:max_used_size = 268393216
shmem:real_used_size = 268225616
shmem:total_size = 268435456
shmem:used_size = 220534792


From: sr-users-bounces at lists.sip-router.org<mailto:sr-users-bounces at lists.sip-router.org> [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Heenan, Timothy Steven
Sent: Wednesday, September 03, 2014 3:28 PM
To: 'miconda at gmail.com<mailto:miconda at gmail.com>'; Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] Kamailio 4.0.4 slow memory leak

I have about 460 destination sets. In each set I could have from 1 address up to 6.

When I took that initial memory log, Kamailio had been restarted shortly beforehand. I just took another one after the system had decayed so Kamailio was responding to Invites with "SIP/2.0 500 No error (2/SL)." (exhibiting the issue after a few days) and the log is about 400Mb! I'll attach a small snippet.
Seems to be going on and on about the dispatcher module.


From: Daniel-Constantin Mierla [mailto:miconda at gmail.com]
Sent: Thursday, August 28, 2014 5:03 AM
To: Heenan, Timothy Steven; Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] Kamailio 4.0.4 slow memory leak

Looking at the logs, there are 1336 URIs, which seems ok given your numbers, because the module keeps also the previous set of records (needed because at reload time there can be kamailio worker processes using the records -- perhaps we can improve a bit here, I will review the current reload code a bit, since it was a contribution from another developer quite long time ago).

Some more questions:
- how many destination sets (groups) do you have? Can you estimate the minimum and maximum addresses in a set?
- when did you take the memory log? In other words, for how long was kamailio running? Did you wait enough to notice the steady increase of memory usage?

On 28/08/14 01:56, Heenan, Timothy Steven wrote:
Thank you for the help.

For dispatcher, I'm using a database that contains about 700 records.

A reload is performed via cronjob every 5 minutes. The command being used is:

kamctl dispatcher reload



Daniel-Constantin Mierla

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