To find the run time connection pool size in jboss3.2.1

[ddd sss]

I am using jboss3.2.1 and sqlserver2000
Can any one help me to find out the run time Connection pool size?I want to do this to increase the perfomance of my website(To make sure the connection is released after use).
my mssql_ds.xml settings is as follows:
<local-tx-datasource>
<jndi-name>mySQLServerPool</jndi-name>
<connection-url>jdbc:microsoft:sqlserver://cataract1:1433;DatabaseName=macstoret</connection-url>
<driver-class>com.microsoft.jdbc.sqlserver.SQLServerDriver</driver-class>
<user-name>sa</user-name>
macret
<min-pool-size>5</min-pool-size>
<max-pool-size>100</max-pool-size>
<blocking-timeout-millis>5000</blocking-timeout-millis>
<idle-timeout-minutes>15</idle-timeout-minutes>
<transaction-isolation>TRANSACTION_SERIALIZABLE</transaction-isolation>
</local-tx-datasource>