I've increased shared memory to 2Gb (-M 16 -m 2048). The free_size parameter was not less than 793Mb during the test. It seems that 2Gb is an optimal value for my setting.

Daniel,
Yes, you're right. That was not a memory leak, I think that this is about amount of memory required by kamailio for the specific test case.

Thanks,
Andrey

2018-01-12 7:42 GMT-05:00 Daniel-Constantin Mierla <miconda@gmail.com>:

My understanding is that used memory goes back to normal after the test, not something that stays high forever, so it doesn't look at all with what you refer to.

Cheers,
Daniel


On 12.01.18 11:13, Olle E. Johansson wrote:
Andrey,
Can you please run “kamcmd tm.stats” and check the values. I have a similar problem and see clearly
a lot of transactions not being freed, eating up memory and ending with out of memory messages in the log.
Have an open issue about it in the bug tracker.

/O

On 12 Jan 2018, at 11:10, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Hello,

if you run with 512MB, is the shm free getting to 1.8MB as well for same figures of registrations and calls?

Cheers,
Daniel


On 12.01.18 09:19, Andrey Deykunov wrote:
Hi,

We use kamailio as a router in our PBX server. The test below causes significant decreasing of free shared memory and 
many "out of memory" errors in kamailio log:

Preconditions: kamailio server with 256Mb of shared memory allocated.

Test actions: run two load testing scripts at the same time: 
  1) 10000 register operations;
  2) 20000 calls (about 300 per sec);

Results: 
    1) memory consumption in peak values:
 - shmem.free_size: 1.8Mb
 - core: 120Mb:
 - build_req_buf_from_sip_req: 12.5Mb
 - msg_lump_cloner: 23.6Mb
 - sip_msg_shm_clone: 84Mb
 - tm module: 118Mb
    2) shmem.free_size parameter back to normal after the test, so it could be concluded that we don't have any memory leaks.

Is it normal behavior or it's possible to do something to increase performance?

PS: the same behaviour occurs for various values of shared memory defined at the start of kamailio server (128Mb, 256Mb, 512Mb etc.).

Thank you,
Andrey


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-- 
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com
Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com
_______________________________________________
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-- 
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com
Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com