[SR-Users] High load average

[Sergiu Pojoga]

Is Kamailio running in a hypervised environment? If so, I've seen async
workers cause high load at runtime, don't recall boot time.

On Mon, May 25, 2020 at 12:12 PM Daniel-Constantin Mierla <miconda at gmail.com>
wrote:

> Hello,
>
> the async task workers are in recvfom(), which should not increase any
> load.
>
> Do you have any chance to test on another os/version? Maybe on centos 7
> and see if it is the same case?
>
> Cheers,
> Daniel
> On 25.05.20 17:56, Володимир Іванець wrote:
>
> Hello again,
>
> I attached a new file.
>
> The interesting part is that Kamailio does not load the CPU at all. *Top* shows
> it at the bottom. Only the "load average" value gets increased.
>
> Thank you!
>
> пн, 25 трав. 2020 о 16:34 Daniel-Constantin Mierla <miconda at gmail.com>
> пише:
>
>> Hello,
>>
>> can you install the package with kamailio debugging symbols? Then take
>> again the kamctl trap with two async workers, it should contain more
>> details about what pieces of code run.
>>
>> The package should be named like kamailio-dbg...
>>
>> Besides that, can you also do a 'top' and see what kamailio processes
>> (their PIDs) eat a lot of cpu?
>>
>> Cheers,
>> Daniel
>> On 25.05.20 11:05, Володимир Іванець wrote:
>>
>> Hello,
>>
>> Attached are two files. One for 2 Async Task Workers and one for 8
>> Workers. The second one was stuck and did not complete.
>>
>> I should point out that the virtual machine has 2 CPU cores. Load average
>> value was stable with 2 workers and was slowly increasing after adding more
>> workers. * workers caused it to increase very fast.
>>
>> Thank you!
>>
>> пт, 22 трав. 2020 о 22:00 Daniel-Constantin Mierla <miconda at gmail.com>
>> пише:
>>
>>> Hello,
>>>
>>> if you can, it would be interesting to get the backtrace and see what
>>> was causing the load.
>>>
>>> Iirc, the Async Task Worker should wait on read on an internal socket,
>>> so it should be no CPU used when nothing is transmitted to this type of
>>> workers.
>>>
>>> Cheers,
>>> Daniel
>>> On 22.05.20 19:20, Володимир Іванець wrote:
>>>
>>> Hello Daniel,
>>>
>>> Thank you for your response.
>>>
>>> I run *kamctl trap* command but the procedure got stuck. Last line in
>>> the generated file contained "---start 12767 -----".  12767 was an Async
>>> Task Worker. Since I don't need them I just removed related configuration.
>>> It must be left after the testing. This solved the problem.
>>>
>>> Please let me know if you are still interested in what was going on and
>>> if I should restore the configuration and run *kamctl trap* again.
>>>
>>> Thank you very much!
>>>
>>> пт, 22 трав. 2020 о 19:10 Daniel-Constantin Mierla <miconda at gmail.com>
>>> пише:
>>>
>>>> Hello,
>>>>
>>>> install gdb and, when the load is high, run:
>>>>
>>>> kamctl trap
>>>>
>>>> It write a file with what kamailio was doing at that moment. Send it
>>>> over here on mailing list or make it available for download somewhere. We
>>>> can look at it and guide further about what can be done.
>>>>
>>>> Cheers,
>>>> Daniel
>>>> On 22.05.20 16:53, Володимир Іванець wrote:
>>>>
>>>> Hello everyone!
>>>>
>>>> I'm running Kamailio version 5.3.3 on a CentOS 6. I started noticing
>>>> that "load average" value increases rapidly with the start of Kamailio:
>>>>
>>>> # uptime
>>>> 17:47:52 up 4 days, 17:47,  3 users,  load average: 7.02, 7.01, 6.02
>>>>
>>>> It will start to decrease immediately after Kamailio is stopped.
>>>>
>>>> Does anyone know what could cause this and how to troubleshoot it?
>>>>
>>>> Thank you!
>>>>
>>>> _______________________________________________
>>>> Kamailio (SER) - Users Mailing Listsr-users at lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>
>>>> --
>>>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>>>> Funding: https://www.paypal.me/dcmierla
>>>>
>>>> --
>>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>>> Funding: https://www.paypal.me/dcmierla
>>>
>>> --
>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>> Funding: https://www.paypal.me/dcmierla
>>
>> --
> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
> Funding: https://www.paypal.me/dcmierla
>
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