Hi Peter, The configurations are as follows: jdk version java version "1.5.0_08" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_08-b03) Java HotSpot(TM) Client VM (build 1.5.0_08-b03, mixed mode, sharing) postgresql version PostgreSQL 8.1.4 jboss version jboss 4.0.4 GA linux server specification RAM 1 GB CPU 3 GHz JVM shows:: JAVA_OPTS="-server -Xms512m -Xmx512m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000" postgres-ds.xml shows:: <local-tx-datasource> <jndi-name>PostgresDS</jndi-name> <connection-url>jdbc:postgresql://1.2.3.4:5432/db_testname</connection-url> <driver-class>org.postgresql.Driver</driver-class> <user-name>xyz</user-name> xyz <type-mapping>PostgreSQL 8.1.4</type-mapping> <min-pool-size>10</min-pool-size> <max-pool-size>64</max-pool-size> <blocking-timeout-millis>30000</blocking-timeout-millis> <idle-timeout-minutes>15</idle-timeout-minutes> <track-statement>true</track-statement> </local-tx-datasource> postgresql.conf shows:: listen_addresses = '*' port = 5432 max_connections = 100 shared_buffers = 1000 org.jboss.resource.connectionmanager.JBossManagedConnectionPool shows:: BlockingTimeoutMillis int RW 30000 MBean Attribute. State int R 3 MBean Attribute. AvailableConnectionCount long R 64 MBean Attribute. ManagedConnectionFactoryName javax.management.ObjectName RW View MBean MBean Attribute. ConnectionCount int R 10 MBean Attribute. NoTxSeparatePools boolean RW True False MBean Attribute. MinSize int RW 10 MBean Attribute. MaxConnectionsInUseCount long R 14 MBean Attribute. MaxSize int RW 64 MBean Attribute. StateString java.lang.String R Started MBean Attribute. InUseConnectionCount long R 0 MBean Attribute. ConnectionCreatedCount int R 42 MBean Attribute. ConnectionDestroyedCount int R 32 MBean Attribute. IdleTimeoutMinutes long RW 15 The applications gets very slow.Does increasing the RAM to 2gb solves it? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133085#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...