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[Qemu-discuss] VM tuning
From: |
Stephan von Krawczynski |
Subject: |
[Qemu-discuss] VM tuning |
Date: |
Fri, 4 Oct 2013 13:07:08 +0200 |
Hello all,
I try to setup a box with 128GB and 32 cpus split into 2 numa nodes. I found
out that while copying a large file to the host some of the qemu guests start
choking. I guess this is because of the vm cache setup.
The probably most important two tunables are:
vm.dirty_background_ratio = 10
vm.dirty_ratio = 20
which is the ditros/kernels (3.11.2) standard setup.
Does anybody have a better idea about these for such a setup?
The guests mem sizes btw sum up to around half of the physical mem, the rest
is used as cache.
--
Regards,
Stephan
- [Qemu-discuss] VM tuning,
Stephan von Krawczynski <=