swap layout: root disk or SAN disk

From: egold@fsa.com
Date: Wed Mar 02 2005 - 20:02:16 EST


Hi gurus.
I'm running solaris 8 and 9 on sun 480's and 490's with 16gb and 32gb ram.
I'm running oracle and sybase on these.
I currently have a 8gb swap on the root disk.

All my servers are connected to fast SAN's that are typically raid5 across
7 or 13 disks with 2gb cache on the SAN.

Should I leave my swap on the root disk or will I get better performance if
I move it to the SAN disks?

If you reccomend the SAN, should I move all the swap to the SAN or leave a
little on the root disks and the majority on the SAN?

Would this give a noticeable performance increase?

Thank you! I will summarize.
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