[SR-Users] Free size of shared memory falls to near zero during the load testing

[Andrey Deykunov]

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 at 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 at 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 Mierlawww.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 Mierlawww.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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