There used to information on sizing the FA in the WAS App documentation, but it appears to have vanished. This was around the number of WAS instances you could monitor with an FA of a given size.
If it's still around, great, and could someone please post a pointer to it?
Otherwise, could this information please be added back to the docs.
Thanks!
The Requirements page for WAS Addon holds this information:
The Splunk Add-on for IBM WebSphere Application Server has no specific sizing guidelines for JMX or file monitoring inputs. For HPEL interface inputs, the add-on can concurrently collect metrics from twenty WebSphere profiles without performance implications.