On Wed, Jun 29, 2011 at 5:57 PM, Emmanuel Noobadmin <centos.admin@xxxxxxxxx> wrote:
On 6/30/11, Giovanni Tirloni <gtirloni@xxxxxxxxxxxx> wrote:Server's unresponsive to the external world. It isn't dead, on two
> I would approach this issue from another perspective: who's locking up the
> server (as in eating all resources) and how to stop/constrain it. You can
> try to renice the sshd process and see what happens. I'm not entirely sure
> what 'locked up' means in this context.
occasions, when it happened at times like Sunday and 1am in the night,
I could afford to wait it out and see that it eventually does recover
from whatever it was.
It's almost definitely related to disk i/o due to the VM guest
fighting over the disks where their virtual disk-files are. However,
the hard part is figuring out the exact factors, I know CPU isn't an
issue having set up scripts to log top output when load goes above 5.
Linux includes I/O in how it calculates the load average so you're not measuring CPU alone.
What does top show?
Any error messages in /var/log during the time the server is unresponsive?
Is network responsive? Latency normal too?
--
Giovanni Tirloni
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