Hi Sohail, Memory ballooning is enabled by checking the "Enable Memory Balloon Optimization" checkbox, which can keep VMs' performance. If left unchecked, any pressure on host memory may trigger swap usage inside VMs. You can leave it unchecked if you have more memory than assigned to all VMs. Consider that memory ballooning and KSM are only used when a host reaches a certain amount of memory use. They are designed to keep your hosts' and VMs' performance, avoiding bottlenecks. Even not setting an optimization policy (overcommit) for Servers or Desktops, enabling Memory Ballooning and KSM can keep your environment performance at its best. Regards, Marcos -----Original Message----- From: sohail_akhter3(a)hotmail.com <sohail_akhter3(a)hotmail.com&gt; Sent: quinta-feira, 3 de março de 2022 09:34 To: users(a)ovirt.org Subject: [External] : [ovirt-users] Does memory ballooning works if memory overcommit is disabled in the cluster Hi All, We have one ovirt 4.4 environment running. In Cluster Optimization settings we have checked "None - Disable memory overcommit" Option in Memory Optimization. But Memory Balloon check box option is enabled. My understanding is that Ballooning only works when memory overcommit is enabled. If it is true then this check box should be disabled when we are not overcommitting memory. Or Still memory ballooning works even if we disabled memory overcommit. According to below link ballooning works when memory overcommit is enabled. https://urldefense.com/v3/__https://lists.ovirt.org/pipermail/users/2017-... Please let me know if any further information is required. Many thanks. Regards Sohail _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org Privacy Statement: https://urldefense.com/v3/__https://www.ovirt.org/privacy-policy.html__;!... oVirt Code of Conduct: https://urldefense.com/v3/__https://www.ovirt.org/community/about/communi... List Archives: https://urldefense.com/v3/__https://lists.ovirt.org/archives/list/users@o...