What is the maximum available sessions for a given servlet engine?

Alessandro A. Garbagnati

Theoretically no, there is no limit for the number of sessions that a servlet engine can support, unless a specific servlet engine provides a way to limit that number. But I've never seen anything like that so far.

The session is just a container object that is stored in the heap space of the engine's JVM. From this, you can infer that the more system memory available, the more sessions the servlet engine can support.