As I can read and understand from the source compute logs, the memory is copied over successfully and there is no migration timeout. But after the instance is paused there is something wrong happening. I first thought it could be the short migration downtime (default=500ms), that's why I increased the "live_migration_downtime" to higher values (max was 300000ms; just for testing:) ) and nothing changed. And the error message doesn't say much either. I don't really want to use post-copy as it can lead to data loss. Auto Converge doesn't seem to help either. Am Fr., 15. Sept. 2023 um 13:56 Uhr schrieb <smooney at redhat.com>: > > On Thu, 2023-09-14 at 19:07 +0200, Rafa wrote: > > > Hi, could you share logs from the target compute node as well? > > > > yes, here: https://paste.openstack.org/show/blpJE8krA1N6PVaLTVF0/ > > > > if the vm is under heavy memory load then its advisable ot use post-copy live migration. > > in general live migration is not intened to be used with a vm under load > as there is no gurenettee that it will ever complete. post-copy live migration > can signifcantly increae the probablity that a vm under load will live migrate > in a reasonabel amount of time. > > https://docs.openstack.org/nova/latest/configuration/config.html#libvirt.live_migration_permit_post_copy > > auto converge can also help but tis less important > > https://docs.openstack.org/nova/latest/configuration/config.html#libvirt.live_migration_permit_auto_converge >