[ovirt-users] ovirt-ha-agent cpu usage

[Nir Soffer]

On Wed, Apr 26, 2017 at 11:36 AM Gianluca Cecchi <gianluca.cecchi at gmail.com>
wrote:

> On Tue, Apr 25, 2017 at 11:28 PM, Nir Soffer <nsoffer at redhat.com> wrote:
>
>>
>>
>> Hi Gianluca,
>>
>> You can run this on the host:
>>
>> $ python -c "import yaml; print 'CLoader:', hasattr(yaml, 'CLoader')"
>> CLoader: True
>>
>> If you get "CLoader: False", you have some packaging issue, CLoader
>> is available on all supported platforms.
>>
>> Nir
>>
>>
>>> Thanks,
>>> Gianluca
>>>
>>>
>
> It seems ok.
>
> [root at ovirt01 ovirt-hosted-engine-ha]#  python -c "import yaml; print
> 'CLoader:', hasattr(yaml, 'CLoader')"
> CLoader: True
> [root at ovirt01 ovirt-hosted-engine-ha]#
>
> Anyway see here a sample of the spikes that it cntinues to have.. from 15%
> to 55% many times
>
> https://drive.google.com/file/d/0BwoPbcrMv8mvMy1xVUE3YzI2YVE/view?usp=sharing
>

There are two issues in this video:
- Memory leak, ovirt-ha-agent is using 1g of memory. It is very unlikely
that it needs so much memory.
- Unusual cpu usage - but not the kind of usage related to yaml parsing.

I would open two bugs for this. We have seen the first issue few month ago,
and
we did nothing about it so the memory leak was not fixed.

To understand the unusual cpu usage, we need to integrate yappi into
ovirt-ha-agent,
and do some profiling to understand where cpu time is spent.

Simone, can you do something based on these patches?
https://gerrit.ovirt.org/#/q/topic:generic-profiler

I hope to get these patches merged soon.

Nir


>
>
> The host is an Intel NUC6i5 with 32Gb of ram. There are the engine, an F25
> guest and a C7 desktop VMs running, without doing almost anything.
>
> Gianluca
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20170426/bf5a2433/attachment.html>