JMS Connections

I was using 10 to 20 senders, and 10-20 receivers (using threads) on certain tests, and then I increaesed the number of allowed connections from the default (100) to 200.

This seems to increase my speed of messages, which suprised me since I assumed 100 connections would be find for even 20 senders and 20 receivers. Does anyone have any info or links to guidelines on how to configure the number of connections ?

Thanks