autoReconnect with PostGres

Hello Group,
I am using postgres in my web application. Number
of physical DB connections are just getting increased for each
re-deployment of my web application. I generally dont shutdown my
webserver and only re-deploy my web application. I heard that
"autoReconnect = true" reuses idle connections for each redeployments. I
am not sure whether this can help me to make physical DB connections
constant.
My configuration parameters:

<Resource
name="jdbc/XXXX"
scope="Shareable"
type="javax.sql.DataSource"
url="jdbc:postgresql://mydb.test.com/micms"
validationQuery="select tablename from pg_tables where schemaname
= &#39;gpdb&#39;"
maxIdle="10"
maxActive="20"
maxWait="-1"
driverClassName="org.postgresql.Driver"
removeAbandoned="true"
username="xxxx"
logAbandoned="true"
removeAbandonedTimeout="120"
password="xxxx" />

Your help would be highly appreciated.

regards,
Ranjan