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

[Nir Soffer]

On Wed, Oct 5, 2016 at 1:33 PM, Simone Tiraboschi <stirabos at redhat.com>
wrote:

>
>
> On Wed, Oct 5, 2016 at 10:34 AM, Nir Soffer <nsoffer at redhat.com> wrote:
>
>> On Wed, Oct 5, 2016 at 10:24 AM, Simone Tiraboschi <stirabos at redhat.com>
>> wrote:
>>
>>>
>>>
>>> On Wed, Oct 5, 2016 at 9:17 AM, gregor <gregor_forum at catrix.at> wrote:
>>>
>>>> Hi,
>>>>
>>>> did you found a solution or cause for this high CPU usage?
>>>> I have installed the self hosted engine on another server and there is
>>>> no VM running but ovirt-ha-agent uses heavily the CPU.
>>>>
>>>
>>> Yes, it's due to the fact that ovirt-ha-agent periodically reconnects
>>> over json rpc and this is CPU intensive since the client has to parse the
>>> yaml API specification each time it connects.
>>>
>>
>> Simone, reusing the connection is good idea anyway, but what you describe
>> is
>> a bug in the client library. The library does *not* need to load and
>> parse the
>> schema at all for sending requests to vdsm.
>>
>> The schema is only needed if you want to verify request parameters,
>> or provide online help, these are not needed in a client library.
>>
>> Please file an infra bug about it.
>>
>
> Done, https://bugzilla.redhat.com/show_bug.cgi?id=1381899
>

Here is a patch that should eliminate most most of the problem:
https://gerrit.ovirt.org/65230

Would be nice if it can be tested on the system showing this problem.

Cheers,
Nir
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