Concurrent running job use 95% CPU but less than 30% memory

Hongqing Tang · Post by **Hongqing Tang** » Mon Jun 21, 2010 5:27 pm

I am running jobs concurrently. At one point of time, there are 36 jobs running concurrently. We saw the CPU shot up to 95% utilization but memory only used less than 30%. Those are just read and then write out jobs, should not consume a lot of CPUs. Is there a set of environment parameters that we can adjust to make the jobs to utilize more memories?

ray.wurlod · Post by **ray.wurlod** » Mon Jun 21, 2010 5:51 pm

Like any batch process, a DataStage job will consume as much CPU as it can to get the job done as quickly as possible. Since streaming I/O is used wherever possible, there are no waits on I/O to preclude use of the CPU. That you aren't using much memory means exactly that you aren't using much memory - your job does not have any memory-intensive activitiy occurring.