What is the version and mode of OCUM that you are running ? If its 7Mode you can customize the data collection. To do the same pls refer section 14 "Data Collection " page 69 of the TR4090 titled Performance Advisor Features and Diagnosis:OnCommand Unified Manager 5.0/5.1(7-Mode)
If its clustered Ontap you cannot customize the data collection interval, retention or coutners.
Using NMC we have to manually do print screens for several graphs daily. Can we automate this somehow? There has to be a way to have NMC or DFM send the reports in graph format showing Latency, CPU, etc... We need to send them every 4 hours for 10 filers. Hope you can help us.