[ovirt-users] ovirt-webadmin is too slow

Einav Cohen ecohen at redhat.com
Wed May 6 14:43:44 UTC 2015

we have done a few optimizations to the overall loading time of the 
application, a couple [1] in 3.5, another one [2] will be available 
in 3.6. 

some of these optimizations made the initial loading time of each 
main tab (i.e. first main tab selection right after login) a bit 
slower, but after waiting for a *very* short period of time of 
letting the main-tab finalize its loading, the ux should be fairly 

I assume that some other factors may be affecting the ux, such as 
the load on your engine server (you mentioned you have 120 VMs - 
how many of them are up? how many Hosts do you have? how strong is 
your engine server machine / how does the mem/cpu/net performance 
of your engine-server machine look like? any suspicious messages 
in your engine/server.log?), the connectivity between your engine-
server and your hypervisors, as well as between your engine-server 
and your client [3], the fact that this is a pretty advanced Firefox 
on a deprecated Windows OS [4], etc. 

there is also a ux problem of contents in the page being highlighted 
sometimes when doing multi-selection [5] - we are aware of that. 

my recommendation would be to test a different client (preferably 
Linux), ensure that the engine is not overloaded and ensure that 
the engine <-> hypervisors connectivity and the engine <-> client 
connectivity are reasonable. 

Alexander (and/or others) can share thoughts as well, if any. 


[1] https://gerrit.ovirt.org/#/c/30710/ , https://gerrit.ovirt.org/34703

[2] https://gerrit.ovirt.org/#/c/34193/

[3] from our experience, a 120ms engine<->client connectivity should 
work pretty well, but a 220ms connectivity, for example, will be more 
prone to ux problems such as a 'stuck' UI. 

[4] http://windows.microsoft.com/en-us/windows/end-support-help

[5] Bug 1143922 - Selecting multiple objects via UI,colors screen with os-default-highlight-color [could be orange, could be blue, ...] highlighting which is visually displeasing

----- Original Message -----
> From: "lofyer" <lofyer at lofyer.org>
> To: users at ovirt.org
> Sent: Wednesday, May 6, 2015 8:02:03 AM
> Subject: [ovirt-users] ovirt-webadmin is too slow
> I've installed ovirt-engine-3.5.1 and created about 120 VMs.
> Everytime I did a multi-selection it will take a not-so-short time with
> not-so-friendly user experience(seems to be stuck by something).
> I'm using Firefox37 in XP with 2GB memory.
> Will there be some optimization option?
> _______________________________________________
> Users mailing list
> Users at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users

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