[ovirt-users] Performance Issue

[Roy Golan]

On Tue, 17 Apr 2018 at 12:58 Thomas Fecke <thomas.fecke at eset.de> wrote:

> Hey Thank you,
>
>
>
> If been monitoring vor about an Hour now. The Templates VM´s are really
> slow – copy a new Template is slow. Non Template VM´s are fast
>
>
>
> Storage IO is average on 75 M/s Read Disk and 25 Write Disk. ( SSD Raid )
>
> Network is on 500 Mbits/s internal ( 10 Gbit Stroage connection )
>
> And about 25Mbit/s external ( 400.000 k Internet )
>
>
>
> I realy cant find that bottle neck
>
>
>

what type is the disks, the domain, how many domains ?


> *From:* Roy Golan <rgolan at redhat.com>
> *Sent:* Dienstag, 17. April 2018 11:52
> *To:* Thomas Fecke <thomas.fecke at eset.de>
> *Cc:* users at ovirt.org
> *Subject:* Re: [ovirt-users] Performance Issue
>
>
>
>
>
> On Tue, 17 Apr 2018 at 12:45 Thomas Fecke <thomas.fecke at eset.de> wrote:
>
> Okay,
>
>
>
> it seems to be that the Storage IO is the Problem – every Write and Read
> Process takes a lot of time
>
>
>
> Sometimes the copy Job stops with 0/Byte and the traffic goes up and down
> like a mountain.
>
>
>
>
>
> But the Storage Read and Write M/s looking fine… I don’t get it
>
>
>
> Any toughts?
>
>
>
>
>
> Keep monitoring you storage backend interface and see what's going on
> there if you don't see anything special on the host. It could be the
> network that leads to slow IO as well, who knows.
>
> If the initial VM creation is taking long you might want to create a pool
> from your template with Pre-Started VMs, and that would at least save you
> from the wait when you actually need the VM.
>
>
>
> *From:* users-bounces at ovirt.org <users-bounces at ovirt.org> *On Behalf Of *Thomas
> Fecke
> *Sent:* Dienstag, 17. April 2018 10:58
> *To:* users at ovirt.org
> *Subject:* [ovirt-users] Performance Issue
>
>
>
> Hey Guys,
>
>
>
> We Deploy a lot of Templates. We got our Training Environment build in
> Ovirt.
>
>
>
> Our Problem – when we Deploy the Same Template. The VM´s getting slower
> every Time we deply a new VM from that Template.
>
>
>
> And I really don’t know why. RAM locking good – CPU and Network looking
> good.
>
>
>
> But it take about 15 Minute to create a new Template based VM – normaly it
> takes about 30 Seconds.
>
>
>
> I checked nload and the Interface traffic – but its not really high.
>
>
>
> Can someone explain why its getting so slow and how to troubleshoot?
>
>
>
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>
>
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