AFAIK all you can do is check if the PID associated with that db2agent is still up and running.
If youīre using remote clients, take an application snapshot and look for the PID at the client machine and check, on that machine, if that process is still alive.
I found out I had "zombie" agents when the application accessing the Database was shutdown and the connections werenīt released, even after forcing them off.
Besides that, I donīt have a recipe or a how-to, considering I usually find īem manually.
HPH
Fernando Ohana