Hi, We have 8 CPUs on each node (Sun-Fire-V490 - 3 Node RAC) Oracle 9.2.0.6 <http://9.2.0.6>, Sun OS 2.9 Anytime we look at the number of parallel process, it is close to 50. Since we have 8 CPUs and parallel_threads_per_cpu=2, Is there any advantage of having more than 16 parallel process? We defined the "parallel_max_servers=100", is it the right value of 8 CPU machine? $ ps -ef|grep p0|wc -l 48 SQL> show parameter parallel NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ fast_start_parallel_rollback string LOW log_parallelism integer 1 parallel_adaptive_multi_user boolean TRUE parallel_automatic_tuning boolean TRUE parallel_execution_message_size integer 4096 parallel_instance_group string parallel_max_servers integer 100 parallel_min_percent integer 0 parallel_min_servers integer 0 parallel_server boolean TRUE parallel_server_instances integer 3 parallel_threads_per_cpu integer 2 recovery_parallelism integer 0