[ovirt-users] Re: Memory ballon question

Hi, It is the ballooning operation log: - From - how much memory was left in the VM before the action - To - how much after (could be both lower and higher) I do not remember the units, but I think it was in KiB. Martin On Thu, Jun 13, 2019 at 9:26 PM Strahil Nikolov <hunter86_bg(a)yahoo.com&gt; wrote: > > Hi Martin,Darrell, > > thanks for your feedback. > > I have checked the /var/log/vdsm/mom.log and it seems that MOM was actually working: > > 2019-06-13 07:08:47,690 - mom.GuestMonitor.Thread - INFO - GuestMonitor-node1 starting > 2019-06-13 07:09:39,490 - mom.Controllers.Balloon - INFO - Ballooning guest:node1 from 1048576 to 996147 > 2019-06-13 07:09:54,658 - mom.Controllers.Balloon - INFO - Ballooning guest:node1 from 996148 to 946340 > 2019-06-13 07:10:09,853 - mom.Controllers.Balloon - INFO - Ballooning guest:node1 from 946340 to 899023 > 2019-06-13 07:10:25,053 - mom.Controllers.Balloon - INFO - Ballooning guest:node1 from 899024 to 854072 > 2019-06-13 07:10:40,233 - mom.Controllers.Balloon - INFO - Ballooning guest:node1 from 854072 to 811368 > 2019-06-13 07:10:55,428 - mom.Controllers.Balloon - INFO - Ballooning guest:node1 from 811368 to 770799 > 2019-06-13 07:11:10,621 - mom.Controllers.Balloon - INFO - Ballooning guest:node1 from 770800 to 732260 > 2019-06-13 07:11:25,827 - mom.Controllers.Balloon - INFO - Ballooning guest:node1 from 732260 to 695647 > > Best Regards, > Strahil Nikolov > > В четвъртък, 13 юни 2019 г., 17:27:01 ч. Гринуич+3, Martin Sivak <msivak(a)redhat.com&gt; написа: > > > Hi, > > iirc the guest agent is not needed anymore as we get almost the same > stats from the balloon driver directly. > > Ballooning has to be enabled on cluster level though. So that is one > thing to check. If that is fine then I guess a more detailed > description is needed. > > oVirt generally starts ballooning when the memory load gets over 80% > of available memory. > > The host agent that handles ballooning is called mom and the logs are > located in /var/log/vdsm/mom* iirc. It might be a good idea to check > whether the virtual machines were declared ready (meaning all data > sources we collect provided data). > > -- > Martin Sivak > used to be maintainer of mom > > On Thu, Jun 13, 2019 at 12:26 AM Darrell Budic <budic(a)onholyground.com&gt; wrote: > > > > Do you have the overt-guest-agent running on your VMs? It’s required for ballooning to control allocations on the guest side. > > > > On Jun 12, 2019, at 11:32 AM, Strahil <hunter86_bg(a)yahoo.com&gt; wrote: > > > > Hello All, > > > > as a KVM user I know how usefull is the memory balloon and how you can both increase - and also decrease memory live (both Linux & Windows). > > I have noticed that I cannot decrease the memory in oVirt. > > > > Does anyone got a clue why the situation is like that ? > > > > I was expecting that the guaranteed memory is the minimum to which the balloon driver will not go bellow, but when I put my host under pressure - the host just started to swap instead of reducing some of the VM memory (and my VMs had plenty of free space). > > > > It will be great if oVirt can decrease the memory (if the VM has unallocated memory) when the host is under pressure and the VM cannot be relocated. > > > > Best Regards, > > Strahil Nikolov > > > > _______________________________________________ > > Users mailing list -- users(a)ovirt.org > > To unsubscribe send an email to users-leave(a)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/LUWCN2MLNTD... > > > > > > _______________________________________________ > > Users mailing list -- users(a)ovirt.org > > To unsubscribe send an email to users-leave(a)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/22XYJD7XAYZ... > > _______________________________________________ > Users mailing list -- users(a)ovirt.org > To unsubscribe send an email to users-leave(a)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/7UDVZJ3EDXY... >