high CPU response times, altough low CPU utilization

Hi Friends,

We have a performance problem after we migrate our basis system,

The current system is :

Database server : Sun SPARC Enterprise T5240 Server - 2 CPU's with 6 core, 8 thread, 1.2 Ghz

32 GB RAM

and we use another identical configured server as an application server.

Database is Oracle 10.2.0 and operating system is Solaris 10.

The problem is average CPU response time is 450 ms, and max. CPU load is %5 percent.

Pre-migration configuration with old servers, we had CPU response : 150 ms and max CPU load: 50%.

Has anyone of you, have experinced a similar problem with this new CPU's?

Thanks in advance