Hi, it is just a matter of perspective: MaxFreeMemoryforOverUtlized - the host is considered over utilized when the free memory is below defined maximum value MinFreeMemoryforUnderUtilized - the host is considered under utilized when the free memory is at least the defined minimal value Best regards -- Martin Sivak oVirt On Wed, Jun 13, 2018 at 7:14 PM, Alastair Neil <ajneil.tech(a)gmail.com&gt; wrote: > Can someone clarify these setting for me, I am having difficulty parsing > what exactly they mean. They seem to me to be backwards. > > If I wish to set a threshold at which I want my host to be consider over > utilized, not schedule any new VMs, and migrate VMs away, then surely I > should specify a minimum threshold of free memory. I.E. if free memory > drops below my threshold (OR memory use exceed a maximum threshold) migrate > VM's off of this system. > > Conversely if a system is underutilized I should set a maximum threshold of > free memory (Or minimum used memory). > > Thanks, > > --Alastair > > > _______________________________________________ > 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/C25Z6WQRPXX... >

Which does work for under-utilized threshold where normal situation is when free memory is above the threshold (or used memory below it). But it does not work for over utilized threshold where normal is when free memory is above the treshold. There are many ways to describe those (above, below, used memory, free memory) and it is too late to change it anyway. Best regards Martin Sivak On Thu, Jun 14, 2018 at 12:12 AM, Alastair Neil <ajneil.tech(a)gmail.com&gt; wrote: > when the free memory is below defined maximum value > > this is the problem, this statement is veiled in double negatives > > When a quantity is below a "Maximum" value then this is should be considered > normal > when a quantity exceeds a Maximum value this should be considered an error > condition > > but this is not the case - when free memory falls below the threshold of > MaxFreeMemoryforOverUtlized we are overutilized > > On Wed, 13 Jun 2018 at 17:14, Martin Sivak <msivak(a)redhat.com&gt; wrote: >> >> Hi, it is just a matter of perspective: >> >> MaxFreeMemoryforOverUtlized - the host is considered over utilized >> when the free memory is below defined maximum value >> MinFreeMemoryforUnderUtilized - the host is considered under utilized >> when the free memory is at least the defined minimal value >> >> Best regards >> >> -- >> Martin Sivak >> oVirt >> >> >> On Wed, Jun 13, 2018 at 7:14 PM, Alastair Neil <ajneil.tech(a)gmail.com&gt; >> wrote: >> > Can someone clarify these setting for me, I am having difficulty parsing >> > what exactly they mean. They seem to me to be backwards. >> > >> > If I wish to set a threshold at which I want my host to be consider over >> > utilized, not schedule any new VMs, and migrate VMs away, then surely I >> > should specify a minimum threshold of free memory. I.E. if free memory >> > drops below my threshold (OR memory use exceed a maximum threshold) >> > migrate >> > VM's off of this system. >> > >> > Conversely if a system is underutilized I should set a maximum threshold >> > of >> > free memory (Or minimum used memory). >> > >> > Thanks, >> > >> > --Alastair >> > >> > >> > _______________________________________________ >> > 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/C25Z6WQRPXX... >> >