[openstack-dev] [Ceilometer] [Rally] Does Ceilometer affect instance creation?

Boris Pavlovic bpavlovic at mirantis.com
Tue Dec 10 12:25:19 UTC 2013

Nadya, Julien,

We are working around profiling system based on logs. This will allows us
to detect bottlenecks.
We should make a couple of small patches in each project to support

As we are going to be well integrated with OpenStack infrastructure we are
going to use Ceilometer as a log collector.
And we already made patch for this in Ceilometer:
So it will be nice to get it reviewed/merged.


Best regards,
Boris Pavlovic

On Tue, Dec 10, 2013 at 3:19 PM, Julien Danjou <julien at danjou.info> wrote:

> On Tue, Dec 10 2013, Nadya Privalova wrote:
> Hi Nadya,
> > Guys, if you have any questions or comments you are welcome! I think that
> > 2x difference between avg time in "empty lab" and "5 sec polling"
> scenario
> > is not a bad result. But 100 instances that were being monitored during
> the
> > test is not a real load for the lab. What do you think? Should I repeat
> the
> > test with 1000 instances?
> You didn't mention where you were storing the metrics. If you store them
> in the same MySQL DB that's used by Nova for example, it's likely that's
> the problem is the load Ceilometer puts on the MySQL cluster slows Nova
> down.
> I don't think it's worth running the test with more instances for now.
> The results are clear, the next action should be to see why things are
> slowed down that much. It shouldn't happen.
> --
> Julien Danjou
> # Free Software hacker # independent consultant
> # http://julien.danjou.info
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