Auto-converge will slows down instance CPU until the memory copy process is faster than the instance's memory writes so i test on my system and the instance can be timeout some packets before it was migrated completely, Enable post-copy, I use in my system because I see that instance won't be timeout when it was live migrated but: Possible downsides: When the network connection between source and destination is interrupted, page faults cannot be resolved anymore, and the virtual machine is rebooted. Post-copy may lead to an increased page fault rate during migration, which can slow the instance down In my case, I don't see impacts with this option till now. https://docs.openstack.org/nova/yoga/admin/live-migration-usage.html Nguyen Huu Khoi On Tue, Oct 17, 2023 at 1:08 PM hai wu <haiwu.us@gmail.com> wrote:
Do you enable auto-converge for nova instance live migration on all production hypervisor hosts?