Hi Maria, I guess the memory usage is very specidic to the environment. My setup includes 2 VDOs, 8 gluster volumes , 2 clusters, 12 VMs and only 1 user - the built-in admin . In result my engine is using 4GB of RAM. How many users/storages/clusters/VMs do you have ? When you login on the engine, what is the process eating most of the RAM? My suspicion is the DB. If so, maybe someone else can advise if performing vacuum on DB during upgrade will be beneficial. Best Regards, Strahil NikolovOn Jun 13, 2019 15:55, souvaliotimaria@mail.com wrote:

Hello and thank you very much for your reply.

I'm terribly sorry for being so late to respond.

I thought the same, that dropping the cache was more of a workaround and not a real solution but truthfully I was stuck and can't think of anything more than how much I need to upgrade the memory on the nodes. I try to find info about other ovirt virtualization set-ups and the amount of memory allocated so I can get an idea of what my set-up needs. The only thing that I found was that one admin had set ovirt up with 128GB and still needed more because of the growing needs of the system and its users and was about to upgrade its memory too. I'm just worried that ovirt is very memory consuming and no matter how much I will "feed" it, it will still ask for more. Also, I'm worried that there one, two or even more tweaks in the configurations that I still miss and they'd be able to solve the memory problem.

Anyway, KSM is enabled. Sar shows that the committed memory when a Windows 10 VM is active too (alongside Hosted Engine of course, and two Linux VMs - 1 CentOS, 1 Debian) is around 89% in the specific host that it runs (together with the Debian VM) and has reached up to 98%.

You are correct about the monitoring system too. I have set up a PRTG environment and there's Nagios running but they can't yet see ovirt. I will set them up correctly the next few days.

I haven't made any changes to my tuned profile. it's the default from ovirt. Specifically, the active profile says it's set to virtual-host.

Again I'm very sorry for taking me so long to reply and thank you very much for your response.

Best Regards, Maria Souvalioti _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/site/privacy-policy/ oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/G4YELWF5L4AKUT...