Perfstat is a diagnostic data collection tool for NetApp filers. If and when they experience performance issues, NetApp Support will likely ask for perfstat to be run against the ailing filers. This is (hopefully) not something that is done often, and therefore, the details of how to run it may get rusty, which is problematic in the middle of an availability storm.
A few months ago (has it been that long already?!) we started the process of pushing some of our internal Operations toolkit out in the open (and you can rightly argue that we barely dipped our toes in the water).
We are picking up where we left off, and are working towards releasing several other tools over the next few weeks, some of them trivial (let’s call them utilities), others far more significant (true tools).