Java EE 8 High Performance

Java EE and pools

Java EE has a lot of pool types involved in its stack. Here is a summary of the ones you may want to have a look at while tuning your application. Each time, the tuning logic will be based on the same logic: no wait time and start with a medium size in order not to over allocate resources and impact the application too much.

Pool Type	Description
The DataSource pool	This handles and recycles database connections.
The ConnectionFactory pool	This handles JMX connections to the broker.
The @Stateless pool	This handles the recycling of stateless instances. Today, it is relevant when stateless instances are used as a poor man throttling implementation (max instance = max concurrency) or when the instances access some ...