I've deployed Hibernate as a SAR in JBoss 3.2.1.
I'm using a Postgres database.
To enable connection pooling in my project I only need to define the "min-pool-size", "max-pool-size", etc. parameters in my "postgres-ds.xml" so that Hibernate can use pooling?
How do I know if Hibernate is using connection pooling after these changes?

Strange thing is with or without the pooling parameters in my "postgres-ds.xml" the console always shows me:

(...)
12:45:15,416 INFO [JBossManagedConnectionPool] Starting
12:45:15,416 INFO [JBossManagedConnectionPool] Started
(...)

How can I know if it's really reading my pooling parameters.

JBoss has a nice management console which allow you to view the MBeans and other aspects via your web browser. Find the deployed postgess MBean and look at the parameters. You can possibly change the values if needed.

Postgres MBean?
I've installed Hibernate as a SAR in JBoss. In the SAR I have a "postgres-ds.xml" where I put my pooling parameters. I've looked in "http://localhost:8080/web-console/" and in my Hibernate MBean I see no reference to the pooling parameters. Do I have to put a property in the "hibernate.cfg.xml" to activate pooling?
I'm a bit confused.

NOTE: I followed "http://hibernate.bluemars.net/66.html" to create my SAR.

In the Hibernate SAR, you should have a jboss-service.xml that defines the MBean parameters. The attribute:

<attribute name="Datasource">java:/jdbc/DataSource</attribute>

should point to the data source that you defined in the postgres-ds.xml.


In the jboss web-console, you should see a bunch of references to the data source.


Sherman

The postgres_ds connection descriptor creates MBeans at deployement for the connection pool. Have a look at that MBean rather then the hibernate one.