[Users] Performance degradation on 042stab113.X

[Karl Johnson]

Hi Vasily,

Every weekend I do backups of all CT which take a lot of IO. It didn't
affect much load average before 108 but as soon as I upgraded to 113, load
got very high and nodes became sluggish during backups. It might be
something else but I was looking for feedback if someone else had the same
issue. I will continue to troubleshoot this issue. Meanwhile, I will
upgrade them from 113.12 to 113.21 and see how it goes even if there's
nothing related to this in the changelog.

Thanks for the reply,

Karl

On Tue, Mar 29, 2016 at 5:21 AM, Vasily Averin <vvs at virtuozzo.com> wrote:

> Dear Karl,
>
> no, we know nothing about possible performance degradation between
> 042stab108.x and 042stab113.x kernels.
> High load average and CPU peaks  are not a problems per se,
> it can be caused by increased activity on your nodes.
>
> Could you please explain in more details,
> why you believe you have a problem on your nodes?
>
> Thank you,
>         Vasily Averin
>
> On 28.03.2016 20:28, Karl Johnson wrote:
> > Hello,
> >
> > Did anyone notice performance degradation after upgrading vzkernel to
> > 042stab113.X? I’ve been running 042stab108.5 on few nodes for a while
> > with no issue and upgraded to 042stab113.12 few weeks ago to fix an
> > important CVE and rebase to latest rhel6 kernel.
> >
> > Since the upgrade from 108.5 to 113.12, I noticed much higher load
> > average on those upgraded OpenVZ nodes, mostly when IO is heavily
> > used. High CPU peaks are much more frequent. I would be curious to
> > know if someone else has the same issue. I wouldn’t downgrade because
> > of security fix PSBM-34244.
> >
> > Regards,
> >
> > Karl
> >
> >
> > _______________________________________________
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> > Users at openvz.org
> > https://lists.openvz.org/mailman/listinfo/users
> >
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