JBossDeveloper

I'm saying that it should not be necessary.

We should figure out why your transactions are taking a long time and fix that.

Increasing the max-pool-size is however, a pragmatic solution if it's a production issue.

Also it might happen that increasing the max-pool-size will end in a OOM error as the concurrent long running threads might use a lot of resources.

Best is to reduce the Tx duration. Other option is to restrict the number of such long running Tx.