[ovirt-users] heavy webadmin

[Greg Sheremeta]

We have patches in review that should fix this in 3.6.5. The underlying
problem is a couple of JavaScript memory leaks.

Best wishes,
Greg


On Fri, Jan 8, 2016 at 10:41 AM, Nir Soffer <nsoffer at redhat.com> wrote:

> On Fri, Jan 8, 2016 at 4:42 PM, Alexander Wels <awels at redhat.com> wrote:
> > On Friday, January 08, 2016 04:29:47 PM Nir Soffer wrote:
> >> On Fri, Jan 8, 2016 at 1:13 PM, Nathanaël Blanchet <blanchet at abes.fr>
> wrote:
> >> > Hi all,
> >> >
> >> > Since I upgraded engine to 3.6, I noticed that the webadmin takes a
> lot of
> >> > ressources whatever is the browser. It can become very slow even for
> small
> >> > actions, like changing tabs or editing a vm. The browser activity
> becomes
> >> > intensive (100% of cpu) and the processor very hot with a increased
> fan
> >> > activity. I suppose javascript to be responsible of this behaviour. Is
> >> > there a way to reduce the resource allocated to the webadmin?
> >> > (This is not a weakness of my laptop which is an i7 cpu with 16GB of
> RAM)
> >>
> >> Sounds like https://bugzilla.redhat.com/1264809
> >>
> >> It was closed because we could not reproduce it with current versions.
> >>
> >> I would try first to upgrade to latest 3.6 version, and if you can
> reproduce
> >> it, please reopen this bug.
> >>
> >> Alexander: can you advice on how to debug this?
> >>
> >> Nir
> >
> > If you are willing to spend some time helping us debug that would be
> great as
> > obviously we are unable to reproduce. If you have Chrome, can you open
> the
> > development tools (ctrl-shift-i) and go to the 'Profiles' tab. That
> should give
> > you the option to 'Collect Javascript CPU Profile' among other things.
> Make
> > sure you select that, and click start. Then go in the web admin and do
> > something that makes your CPU spike. Let it go for a little bit doesn't
> have
> > to be long.
> >
> > Go back to the CPU profiles tab and click stop. That will generate a
> profile and
> > that profile will include the percentage of CPU usage per method. It
> should be
> > sorted by percentage. If you can take a screen shot of that and give me
> the
> > exact rpm version, I can use that to de-obfuscate the method name and
> > hopefully get some useful information.
>
> You can also save such profile to file, and attach it to the bug.
>
> When I reorted this, this was also reproducible in Firefox, and both
> profiles
> are attached to the bug.
>
> Nir
> _______________________________________________
> Users mailing list
> Users at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>



-- 
Greg Sheremeta, MBA
Red Hat, Inc.
Sr. Software Engineer
gshereme at redhat.com
919-741-4016
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20160403/f3bb725f/attachment-0001.html>