BEA Weblogic Interview Question:

Is it better to have more or fewer sessions for a given number of subscribers?

Submitted by: Administrator

Using N sessions for N subscribers gives you concurrency up to N simultaneous threads of execution provided you have as many threads to work with. Each Session gets its own thread as long as there are enough threads available. Otherwise, the sessions serially reuse the available threads.
One session for N subscribers serializes all subscribers through that one session. If the load is heavy they may not be able to keep up without the extra threads.
If you are using CLIENT_ACKNOWLEDGE, N sessions gives you N separate message streams that can be individually recovered. Having one session crosses the streams giving you less control.
Submitted by: Administrator