[one-users] Opennebula response time increasing

[Christoph Robbert]

Hello,

i use MySQL as Database. I query Opennebula from python via pyoca[1]. 
But i registered the same effect using the command "onevm list".

The effect depend also on the number of running VMs, but i run only at 
maximum 30 VMs. The effect starts at round about 6 VMs. Usually the time 
increases to round about one or two seconds. But suddenly it response 
very slow >>>60 seconds or didn't answer.

Also the creation of a new VM getting stucked (response time also 
increases to over 60 seconds).

Sometimes the time increases to round about 240 seconds for one call. 
Then the next call takes about one or two seconds.

I couldn't see an xml-rpc request in the oned.log because my gui wait 
until the last xml-rpc request is finished.

I profile every part of my code with time measurements and traced it 
down to the xml-rpc requests to opennebula.

Hope this help.

Regards,

Christoph Robbert



[1] https://github.com/lukaszo/python-oca 
<https://github.com/lukaszo/python-oca>



Am 04.09.2012 12:59, schrieb Carlos Martín Sánchez:
> Hi,
>
> Can you share some more information about your scenario? Are you using 
> sqlite, or mysql? MySQL can drastically improve the performance over 
> sqlite.
>
> How are you querying OpenNebula, are you using the CLI, our ruby/java 
> OCA? The response time can be affected by the xml processing that the 
> OCA has to do. If you are using Ruby, it is crucial that you have the 
> nokogiri gem installed
>
> Does the response time increase always over time, or is it related to 
> the number of existing VMs? If so, how many VMs does it take to make 
> it irresponsive?
>
> Can you still see the xml-rpc requests in oned.log each second?
>
> I'm trying to reproduce the problem, having over a 1000 running VMs. 
> I'm doing a onevm create & shutdown every 5 seconds while checking the 
> time it takes to do a onevm list each second, but can't see any 
> response taking more than one or two seconds.
>
> Regards
> --
> Carlos Martín, MSc
> Project Engineer
> OpenNebula - The Open-source Solution for Data Center Virtualization
> www.OpenNebula.org <http://www.OpenNebula.org> | 
> cmartin at opennebula.org <mailto:cmartin at opennebula.org> | @OpenNebula 
> <http://twitter.com/opennebula>
>
>
>
> On Tue, Aug 28, 2012 at 1:40 PM, Christoph Robbert 
> <chrobbert at googlemail.com <mailto:chrobbert at googlemail.com>> wrote:
>
>     Hello,
>
>     I'm working on project with Opennebula 3.6 as cloudcontroller. We
>     start and stop VMs via xml-rpc nearly every 15 seconds. To monitor
>     the actions in realtime, i implemented a gui, which calls
>     Opennebula every second via xml-rpc. Now i notice a real big
>     increase of the response time after 10 minutes. The response time
>     increases from nearly 1 second to 5 Minutes. Some time i have to
>     restart Opennebula because the response time increase to infinity.
>     Could you give me a hind where i should start to trace the
>     bottleneck in Opennebula?
>
>
>     Best Regards,
>
>     Christoph Robbert
>     _______________________________________________
>     Users mailing list
>     Users at lists.opennebula.org <mailto:Users at lists.opennebula.org>
>     http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opennebula.org/pipermail/users-opennebula.org/attachments/20120904/c7be4a32/attachment-0002.htm>