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xen-users
Re: [Xen-users] SAR in dom0 or domU
Edoardo Ceccarelli wrote:
The abstraction that Xen gives should be enough to give reliable values
in certain conditions, I was wondering about disk troughput for example:
using LVM the dom0 sar shouldn't even be able to produce values cause it
cannot mount the partition
I use SAR on Dom0... I have LVM on top op MD. It shows correct results
for all LVM block devices, whether or not they are mounted.
In fact I had it spot a domain doing heavy I/O on its swap partition,
caused by syslog-ng going nuts when the log disk was full.
I think you already rules out CPU. Overall I'm pretty sure about the
block device and (non-HVM attached) NIC values. Memory is scoped, so its
per DomU.
This is Xen 3.1.2 on Linux 2.6.18 (Gentoo).
- Joris
[snip]
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