Tracking "temporary storage" and "size of QTEMP" for active jobs on your System i servers can be challenging for systems administrators. The operating system lacks good commands for monitoring the top consuming jobs on the system. You can use the IBM commands WRKACTJOB and WRKJOB to get to some of this information - but it can be a tedious process for quickly finding the active jobs on your system responsible for spikes in these resources. With a better understanding of these distinctly different issues and resources consumed by jobs, you will have a much easier time managing this ongoing issue.