One of the simplest metrics you can capture is simple throughput. How long does it take to store and process a bunch of documents? The timestamps of the documents as seen in TN Console can give you this measurement. With this you can determine a crude docs/sec.
We have figured out that option already. And we are monitoring the throughput and response time to process a bunch of files depending on the size of the file being processed.
But wanna know any other parameter to check the stats of WM like how much memory, CPU etc it is using and any other additional params.