Quantification

Samples are counted in which the following conditions were observed:
  • All TCBs (tasks) are in WAIT state
  • One (or more) TCB is waiting for completion of a DASD I/O request

The number of samples satisfying these conditions divided by the total number of samples represents the percentage of time the step was waiting for completion of DASD I/O. These percentages are computed and reported by DDNAME.

Parent topic: D08 - DASD I/O wait time