Question

I am using Spring MVC + hibernate in my application. Application server is IBM WebSphere v7. While restarting and after restart application, Db2syscs process makes CPU usage 99% and consumes memory usage about 1,034,352K. This goes about 10~15 minutes. I tried increasing the heap size allocated to DB2, which made no difference.

EDIT

These are my hibernate properties in spring configuration file. Will adding cache, pool properties make any affect?

<prop key="hibernate.dialect">org.hibernate.dialect.DB2Dialect</prop>
<prop key="hibernate.generate_statistics">true</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.connection.datasource">jdbc/logincfg</prop>
<prop key="hibernate.transaction.factory_class">org.hibernate.transaction.CMTTransactionFactory
</prop>
<prop key="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.WebSphereExtendedJTATransactionLookup
</prop>

Answer 1

WebSphere itself handles all pooling and cache level for its Data sources. All JDBC related configurations can be performed through WebSphere administrative console. Try using connection pool datasource instead of XA datasource. Also check heuristic hazard in server configuration. These will decrease load on CPU.