CPU Affinity After Live Migration of Virtual Machine on NUMA Systems
(Doc ID 2225684.1)
Last updated on SEPTEMBER 12, 2019
Applies to:Oracle VM - Version 3.2.1 to 3.4.6 [Release OVM32 to OVM34]
Oracle Cloud Infrastructure - Version N/A and later
By default, a VM guest starts up with vCPUs limited in one NUMA node.
After a live migration of a virtual machine between two servers with NUMA architecture, the CPU affinity is set to "any CPU" over all NUMA nodes.
As a result, the migrated virtual machine uses memory across multiple nodes, which degrades performance of the virtual machine.
To view full details, sign in with your My Oracle Support account.
Don't have a My Oracle Support account? Click to get started!
In this Document