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

[Daniel-Constantin Mierla]

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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