The default performance metric statistics collection interval within vCenter is to start rolling up data in an aggregation method starting at just one hour. Much of the data necessary for troubleshooting of performance challenges reported either same day or on the previously day is lost from the vCenter data and forces the administrator to revert to cumbersome and/or time-consuming tooling, such as vRealize Operations Manager. DBAs might not have access to such tools. Hopefully by now they have read-only access to vCenter!
The vCenter performance statistics collection and rollup settings can be customized to provide a longer window of time for critical metrics to be available to the administrator for management.
Click through for some recommendations of aggregation intervals and collection durations to help with virtual machine troubleshooting.