Clint discovered the following:
Source –
Ran into a problem while doing some performance testing on some test VMs. We found that we had no historical performance data for the VM or Host. All we had was real time data. This can be a major issue, especially when you are trying to troubleshoot or like in this case get performance data for a performance test! My co-worker did some research and found that we are not an isolated event. This is a bug in VC 2.5.The Fix
We found a few references to doing a “repair” install of VC 2.5. So we went ahead and tried it and it worked. We also found references to the performance data getting corrupted. In that case they had to restore the database to a prior dataset and re-install the VC.
I’ve seen the same at several customer sites and indeed the fix that Clint describes, repair of VirtualCenter, works.
Here is the solution I found for this problem (which relates to arithmetic error on the daily SQL task):
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003732