Performance Tab - "No data available"

[TBKing]

Host36 shows No Data Available for the one day view in the vCenter Performance tab.  It does display realtime data.

It looks to have flatlined around midnight of 3/23, and then no more data (no line) about midnight 3/25

And

Host37 shows data, but going back, it is flat-lined up Until midnight 3/23. 

It's almost as if they have swapped identities in the db for performance.

Host 36 and 37 are new to the cluster as of 3/6.

The rest of the cluster was upgraded from 3.5 to 5 over Monday and Tuesday, and data is collecting and displaying.

Any ideas where to look, or what to look for?

Thanks

[kjb007]

Make sure your database rollup jobs are running correctly.

Make sure time is synchronized between ESX and vCenter.

-KjB

[rickardnobel]

Sometimes this is caused by the vCenter Web Management Service has crashed on the vCenter Server. Verify that it is running.