It depends on what information you are
trying to obtain.
If you want information about real
hardware (cpu usage, nic’s in dom0 etc) installing in dom0 would be the
best case. Installing in domU can give you good info about individual domain
specific memory, network, tty
usage etc, but cpu percentages may be quite
artificial, and you wouldn’t be able to see real hardware bottlenecks
without examining the other domains.
From:
xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Edoardo Ceccarelli
Sent: April 11, 2008 8:39 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] SAR in dom0
or domU
Hello,
I was wondering about sar under xen: is it more logical to install it on dom0
or in each domU?
about disk i/o it should be able to give disk throughputs even in a dom0, and
maybe, also about cpu usage, memory, etc.
certanly installing sar in a domU will give those values, but will this be
reliable?
what's your opinion about this?
--
Edoardo
