* [Qemu-devel] slow migration speed / strange memory usage
@ 2012-10-29 10:44 Stefan Priebe - Profihost AG
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From: Stefan Priebe - Profihost AG @ 2012-10-29 10:44 UTC (permalink / raw)
To: qemu-devel
Hello list,
i'm running kvm 1.2 on vanilla 3.6.3 kernel.
I'm trying to understand the memory usage and the migration speed.
I've a VM which does nothing else than running OpenSSH and a cron job
every minute to write a small json file.
When the VM is freshly started Host shows 300MB memory usage and
migration speed is around 400MB/s.
After time the memory usage increases in up to 3.7GB but in VM it stays
incl. cache and buffers around 350MB.
The migration speed is then around 25MB/s.
How can this be? Is this expected? Disk cache is set to default (no cache).
Greets,
Stefan
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2012-10-29 10:44 [Qemu-devel] slow migration speed / strange memory usage Stefan Priebe - Profihost AG
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