zxmaus
Thanks for the response. we are on HP-UX server.
you are right, we had fragmentation problem on the unix box. My SA was saying we had the buffer Cache fragmentation as well, which kept adding to our problems.
the Admin ran a over-night de-frag process and increased the kernel parameter bcvmap_size_factor.
We re-booted the box and things look much better now
we are planning to keep an eye on the system and see when it starts to choke, so that we can plan for a de-frag periodically.
Thanks