We use tomcat as our middleware to provide a GUI-like interface for our UNIX character-based back-end. We are running into a problem with maxProcesses being maxed out and users not being able to use the system. A good rule of thumb is to multiply the expected number of sessions times two or three to get the necessary number of processes ... but it only really works if our customer's internal reporting processes are sufficient enough so that the system admininistrator always knows the number of people working for the company (and therefore using the system). What I'd like is some way to keep tabs on the number of processes for any given connector(s) in use, and if it exceeds a certain threshhold, give some sort of sign ... an email, logfile entry, burning bush, whatever.
You could write a filter that alters the style sheets served (*.css) so that all pages blinked in red when the maxprocesses level is being approached. ;)
Seriously though, what are you going to do with this signal? What's it going to say? "You may start panicing now" or something?
If the sysop doesn't know the number of users, how likely is he/she to react this signal, whatever it may be?
I would say what you need more is a log of the usage so you can tell what the growth rate is and then totally avoid the problem by installing more hardware.
Just my 2 cents.
Adam
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