How does your CPU time get measured? Does it include iowait time? If
so, it could just be the period during which the caches are getting
warmed up.
Gordan
On Wed, 2 Nov 2011 20:59:54 +1300, Simon <[email protected]> wrote:
Hi There,
We are running dbmail 2.2.17 on a debian squeeze VM. It has two VCPUs
and 1GB of RAM. Up until today it was connected to our old mailstore
mysql VM (debian lenny, mysql 5.1, 2 GB RAM). Over the past couple of
weeks we have been syncing mail (using imapsync - don't ask.) to our
new mailstore mysql VM (debian lenny, mysql 5.1, 20GB RAM). We
service
about 1000 mailboxes with approx 80GB worth of email in storage.
So, i stopped mail flow and client access, performed the final sync,
changed the database host settings in dbmail.conf to point to the new
mailstore and re-enabled mail flow and client access.
We have seen a massive increase in CPU on the dbmail VM for approx
one
hour (80-90%), then it has dropped back (20-30%) but not to the same
level.... during the height of the day, the vm only ever used to sit
on 5-10% CPU.
I have attached a quick graph from our XenServer console to show
you…
I had thought this might be imap clients re-syncing their email or
something… Any ideas?
Thanks
Simon
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