Hello stackers, I'm reaching out to the community to understand how you manage migrations of memory-intensive instances. We are running RHOSP 17.1 (based on Wallaby) and have faced several issues when live-migrating instances running on compute nodes to do maintenance work. For several memory-intensive instances, the process just never completes properly and ends in error after hours waiting. During the migration, we can see in nova-computes.log of destination compute node that the migration never truly migrates the memory, whenever the reported percentage of memory remaining is close to 0%, it ends up to go back to high percentage again. By looking at the migration UUID, we saw that the memory processed bytes is way higher than the memory total bytes [1]. We played with several `live_migration` options in nova.conf but to no end. Has anyone faced the same issue ? And most importantly, how do you handle the migration of your memory-intensive workload ? Regards, Timothé [1]. $ openstack server migration show 328af6d9-9c9d-4671-a8f9-2c0d3df32b93 e2cda681-e25c-4aca-813c-3641bc6164c9 +------------------------+------------------------------------------------------------------+ | Field | Value | +------------------------+------------------------------------------------------------------+ | ID | 13231 | | Server UUID | 328af6d9-9c9d-4671-a8f9-2c0d3df32b93 | | Status | running | | Source Compute | compute02 | | Source Node | compute02 | | Dest Compute | compute01 | | Dest Host | None | | Dest Node | compute01 | | Memory Total Bytes | 137448202240 | | Memory Processed Bytes | 5300502117730 | | Memory Remaining Bytes | 52182556672 | | Disk Total Bytes | 0 | | Disk Processed Bytes | 0 | | Disk Remaining Bytes | 0 | | Created At | 2026-03-24T10:49:15.000000 | | Updated At | 2026-03-24T13:14:32.000000 | | UUID | e2cda681-e25c-4aca-813c-3641bc6164c9 | | User ID | cc4367e52cce828fa3e378f29ed6df553c2dd99e9a4b33f1835fee719d592c91 | | Project ID | 0382d25c311149fabd7bea0d6fa3ac37 | +------------------------+------------------------------------------------------------------+