From: Peter Lieven <pl@dlh.net>
To: qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: [Qemu-devel] Stalls on Live Migration of VMs with a lot of memory
Date: Tue, 03 Jan 2012 19:04:07 +0100 [thread overview]
Message-ID: <032f49425e7284e9f050064cd30855bb@mail.dlh.net> (raw)
Hi all,
is there any known issue when migrating VMs with a lot of (e.g. 32GB)
of memory.
It seems that there is some portion in the migration code which takes
too much time when the number
of memory pages is large.
Symptoms are: Irresponsive VNC connection, VM stalls and also
irresponsive QEMU Monitor (via TCP).
The problem seems to be worse on 10G connections between 2 Nodes (i
already tried limiting the
bandwidth with the migrate_set_speed command) than on 1G connections.
The problem also seems to be worse in qemu-kvm-1.0 than in
qemu-kvm-0.12.5.
Any hints?
Thanks,
Peter
next reply other threads:[~2012-01-03 18:04 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-03 18:04 Peter Lieven [this message]
2012-01-04 1:38 ` [Qemu-devel] Stalls on Live Migration of VMs with a lot of memory Shu Ming
2012-01-04 9:11 ` Peter Lieven
2012-01-04 10:53 ` Peter Lieven
2012-01-04 11:05 ` Paolo Bonzini
2012-01-04 11:22 ` Peter Lieven
2012-01-04 11:28 ` Paolo Bonzini
2012-01-04 11:42 ` Peter Lieven
2012-01-04 12:28 ` Paolo Bonzini
2012-01-04 13:08 ` Peter Lieven
2012-01-04 14:14 ` Paolo Bonzini
2012-01-04 14:17 ` Peter Lieven
2012-01-04 14:21 ` Peter Lieven
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