we run our DB's in simple mode. Which means our transactions are only as good as the last backup, which is 2am everyday. The performance data will stay. Also, you can check your logging options in vCenter and if they are not already set, maybe turn them to warnings only.
Also, attached is a best practice from VMworld 2008
One other link too
PO2061.PDF 981.3 K
Thanks for the suggestions Troy, I'll bring them up at our meeting if we ever have one. I keep forgetting to look at the VMworld 08 considering I was there...