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

[Olle E. Johansson]

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 Mierla
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