Datastore performance data graphs just say 'No data available'
My recent upgrade from ESXi and vCenter 4.1U3 to 5.0U1 went so smoothly, I should have known that not everything was as it should have been. My battle scars from decades of fighting buggy software (in other words, software) were tingling, and it wasn’t too long before I found the problem. All my datastores’ non-realtime performance data graphs—which I rely on for troubleshooting slow VMs—were blank. ‘No data available‘ was all I got. A call to the refreshingly excellent VMware support folk resulted in a pointer to this KB article. It’s a bit involved, especially if you don’t already have PowerCLI installed, so here’s a quick walk-through.