In qemu 0.14 cache=writeback and cache=none are expected to perform well. The default cache=writethrough is a very conservative setting which is slow by design. I'm pretty sure that it has always been slow, even before 0.12.5.
I think that the specific problem with savevm may be related to the VM state being saved in too small chunks. With cache=writethrough this will hurt most. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/741887 Title: virsh snapshot-create too slow (kvm, qcow2, savevm) -- Ubuntu-server-bugs mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
