Hi Didi,

Just to be sure, considering its an HA instance, I need to set to maintenance=global and execute these changes – CPU increase will most likely require reboot?

For the HEAP changes, I have been doing that lot on the Atlassian instances, just not sure how oVirt-engine is going to react and if there are any guidelines I should stick to in ovirt case.

I.e. What if I set min and max to same value?

Is it going to be “ok” if I assign more than half of system RAM to the JAVA? Ect…

-----

kind regards/met vriendelijke groeten

Marko Vrgotic
Sr. System Engineer @ System Administration

ActiveVideo

o: +31 (35) 6774131

m: +31 (65) 5734174

e: m.vrgotic@activevideo.com
w: www.activevideo.com

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From: Vrgotic, Marko <M.Vrgotic@activevideo.com>
Date: Monday, 22 February 2021 at 09:08
To: Yedidyah Bar David <didi@redhat.com>
Cc: users@ovirt.org <users@ovirt.org>
Subject: Re: [ovirt-users] oVirt Engine increase RAM and CPU

Thank you Didi.

-----

kind regards/met vriendelijke groeten

Marko Vrgotic
Sr. System Engineer @ System Administration

ActiveVideo

o: +31 (35) 6774131

m: +31 (65) 5734174

e: m.vrgotic@activevideo.com
w: www.activevideo.com

From: Yedidyah Bar David <didi@redhat.com>
Date: Sunday, 21 February 2021 at 08:03
To: Vrgotic, Marko <M.Vrgotic@activevideo.com>
Cc: users@ovirt.org <users@ovirt.org>
Subject: Re: [ovirt-users] oVirt Engine increase RAM and CPU

***CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender!!!***

On Fri, Feb 19, 2021 at 12:39 PM Vrgotic, Marko
<M.Vrgotic@activevideo.com> wrote:
>
> Hi oVirt,
>
>
>
> What is the cleanest way to increase the memory and cpu for SHE engine?

Did you try to simply edit the vm from the admin ui? This should be
possible for most fields for quite some time now:

https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.redhat.com%2Fshow_bug.cgi%3Fid%3D1160094&data=04%7C01%7Cm.vrgotic%40activevideo.com%7C8c5a063a844b4749ce0308d8d636b93b%7C214268a3e1214486acd4545c9faf2252%7C0%7C0%7C637494877832293132%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Cba2KwVv8bLqvWnVTFDlO7mkt1C4Gu3DUgN1zXGaUCA%3D&reserved=0

>
>
>
> We have the Engine running on top of three HA hosts, so I guess the specs need to be change on all three, while engine is down.
>
>
>
> Is it done by editing the VM libvirt conf file or some other way?
>
>
>
> Where do I allocate more RAM to JAVA for oVirt?

You can control the values passed as -Xms and -Xmx using the config
values ENGINE_HEAP_MIN and ENGINE_HEAP_MAX.

They are set by engine-setup on initial setup but not changed later.
It writes /etc/ovirt-engine/engine.conf.d/10-setup-java.conf .
It's probably safer to create your own file for overriding, e.g.
99-my-setup-java.conf or something.

There have been various relevant changes to this over the years, you
can search bugzilla for 'ENGINE_HEAP_MIN' to find them.

>
>
>
> We are currently running 4.3.8 version.
>
>
>
> Kindly awaiting your reply.

Good luck and best regards,
--
Didi