We have been experiencing extremely high CPU and disk IO utilization on our production box, with Load Avg anywhere from 3 or 4 up to as much as 20 and 30 (higher at one freakish point). I am working with Canonical and they have been helping with identifying any issues with the installation. Since it appears that ClamAV and Spamd are the biggest culprits (they have on more than 1 occasion basically locked up our server and stopped other services), I think it would be wise for us to offload the processing to another server. I saw you have instruction on this, but I may need a bit more guidance.
We re running VMware ESXi 3.51, and over the next couple months buying another physical server, and Canonical was suggesting we move to 12.04 (which is coming out over the next 1-2 weeks).
1) Can you provide guidance in setting up a second Ubuntu VM strictly for processing Spamd and ClamAV? 2) Lookup-domain.d (sometimes .p) still seem to be running very hot (same as with issue 1). Was this daemon updated with the latest Vm update? 3) Since we rely on Virtualmin for our server, when do you expect it to be able to support 12.04? 4) Do you have any information or experience with tweaking ESXi 3.51 to make the most of performance for Ubuntu?
Thanks so much.
ps. I just saw how to close out all out open tickets. I'll do that shortly.