Database Software

Hi all
I am reviewing performance on a busy message queuing system that has hundreds of sessions enqueuing and dequeuing from a single queue table. The top wait event - by a country mile - is latch: cache buffers chains. This wait causes sessions to spin on the CPU while waiting and it results in high server CPU usage. While performance for the AQ database is ok, the high CPU usage caused by the spinning is impacting some other databases. Changing the queue structure of the application (adding more queues) is unlikely.
What other options are available to reduce the impact of sessions attempting to enqueue/dequeue from the same queue table? I cannot find much reference material about high performance AQ configurations. I believe that partitioning the queue table is not possible.




Many thanks!
Mark