We had a similar situation where we were experiencing performance issues with our NetApp. During this, we installed a demo of Storage Manager to help troubleshoot. Latency was one of our problems as well. For us, this was across all aggregates. Unfortunately we didn't have a single issue to fix that would make everything better. So we used Storage Manager and a few other tools to determine a number of configuration issues that were causing problems.
So far, we have found:
- Multiple volumes running dedupe jobs during busy hours.
- Misaligned VMs. We used NetApp tools for this. It would be nice if this was in Storage Manager. Though it does look like it is in Virtualization Manager, which we are configuring.
- Found one volume doing practically 1/3 of all IO on an aggregate. Tracked that down to a poorly written SQL query being run repeatedly. This started after we installed Storage Manager, but it was very quick and easy to notice, and find the cause of, using it and Virtualization Manager.
We're still building out the Storage Manager set up as well. Just starting to play with File Analysis, which has been interesting. Never would have guessed we would have 2 TB of .tif files.