The information presented for an active prestart job can be refreshed by pressing the F5 key while on the Display Active Prestart Jobs display.
Of particular interest is the information about program start requests. This information can indicate to you whether you need to change the available number of prestart jobs. If you have information indicating that program start requests are waiting for an available prestart job, you can change prestart jobs using the Change Prestart Job Entry (CHGPJE) command.
If the program start requests were not being acted on fast enough, you can do any combination of the following things:
The key is to ensure that there is an available prestart job for every sent request that starts a server job.