Performance Issues with NW 7.3 Portal

All,

I have a urgent issue that needs to be addressed quickly.

I have installed SAP NW 7.3 Portal (AS JAVA, BI JAVA) with SP05. The portal has very poor performance. For any Iview screen, it takes a long time to load.

We have configured SSO between backend BI system and the portal.

I have adjusted Java VM parameters as per SAP Note 723909 - Java VM settings for J2EE 6.40/7.0 and

Note 1044330 - Java parameterization for BI systems

The Heap sizes are set to 4096 MB

I have restarted portal several times, the minute Portal starts, memory consumption goes to 95% on the server.

I appreciate all your help and support.

Regards

Viny