[SR-Users] Seeing Large Waits

[Daniel-Constantin Mierla]

Hello,


On 03.05.18 06:48, Mack Hendricks wrote:
> Hey Alex,
>
> Thanks for the insight. I remember reading your article before and it was super helpful. I think we disabled all of the heavy database operations, but I will double check.
>
> We are building the RURI using the cfg_rpc module,

are you really using cfg_rpc module to build the r-uri? Or did you mean
someting like jsonrpcc?

Cheers,
Daniel

>  so we aren’t hitting a database.   We have a failure route that causes another RURI to be created, which sends the call to a Freeswitch server to play a message.
>
> Let me know if you see any issue with this, I will double check the database calls to be safe.
>
> Sent from my iPhone
>
>> On May 2, 2018, at 11:36 PM, Alex Balashov <abalashov at evaristesys.com> wrote:
>>
>> Hi Mack,
>>
>> What sort of end-to-end delays are you seeing, from receipt of request
>> until immediately before t_relay()?
>>
>> You can profile this with the benchmark module:
>>
>>   https://kamailio.org/docs/modules/5.1.x/modules/benchmark.html
>>
>> Or my preferred method, the hard way:
>>
>>        # At the practical start of request processing.
>>
>>        $avp(proc_start) = $TV(Sn);
>>
>>        # At the end, right before calling t_relay() or forward().
>>
>>        $var(cur_time) = $TV(Sn);
>>
>>        $var(proc_diff) = (
>>                (((
>>                  $(var(cur_time){s.select,0,.}{s.int}) -
>>                  $(avp(proc_start){s.select,0,.}{s.int})
>>                ) * 1000000)
>>                +
>>                (
>>                 $(var(cur_time){s.select,1,.}{s.int}) -
>>                 $(avp(proc_start){s.select,1,.}{s.int})
>>                ) / 1000) mod 1000
>>        );
>>
>>        xlog("L_INFO", "[R-MAIN:$ci] -> Request processing delay: $var(proc_diff) ms\n"););
>>
>> Also, for general background on this topic, you might consider my
>> article on the subject of Kamailio performance characteristics:
>>
>>   http://blog.csrpswitch.com/tuning-kamailio-for-high-throughput-and-performance/
>>
>> If I had to guess, shooting from the hip, you've got some really slow
>> database queries somewhere.
>>
>> -- Alex
>>
>>> On Wed, May 02, 2018 at 06:19:00PM -0400, Mack Hendricks wrote:
>>>
>>> Hey All,
>>>
>>> We are load testing Kamailio 4.2.3 and we are seeing the waiting within the transaction manager increasing.   I’ve increased the children from 8 to 16 to 24, but we are still seeing a large amount of waiting.  I don’t see an errors in the logs.   Can anyone give me a clue on where to look. 
>>>
>>> 05-02-18_03:07:38 PM
>>> tm.stats
>>> {
>>>        current: 390
>>>        waiting: 226
>>>        total: 2361
>>>        total_local: 0
>>>        replied_locally: 1406
>>>        6xx: 0
>>>        5xx: 0
>>>        4xx: 88
>>>        3xx: 0
>>>        2xx: 3180
>>>        created: 2361
>>>        freed: 1971
>>>        delayed_free: 0
>>> }
>>>
>>> Mack Hendricks / Head of Support / dOpenSource
>>> web: http://dopensource.com <http://dopensource.com/>
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>>> _______________________________________________
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>>
>> -- 
>> Alex Balashov | Principal | Evariste Systems LLC
>>
>> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) 
>> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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-- 
Daniel-Constantin Mierla
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