We use Openfire 4.0.1 just with BOSH.
currently ~5000 users created, online users count ~2500
OS Redhat, RAM gived for openfire 10GB
When users are online, we got increasing size of open files for openfire process. By using lsof we can see too many lsof can't identify protocol, and they are increases.
MAx openfiles for openfire process is 100k.
lsof list is attached