Processor Time Per I/O For Batch Jobs - IBM PERFORMANCE MANAGEMENT FOR POWER SYSTEMS - GRAPH REFERENCE DOCUMENT Reference

Processor Time per I/O for Batch Jobs

Processor Time per I/O by Hour for Batch Jobs Graph.
An increase in batch job CPU utilization can result if jobs use more and more CPU over time. The
CPU Usage for Batch Jobs graph shows the average CPU seconds per I/O spent.
The Facts section shows the average batch characteristics for all batch jobs for the reported
month, plus the last two months. The average characteristics shown include CPU time per I/O,
number of I/Os per second, and number of synchronous I/Os per second.
A transaction must wait for a synchronous disk I/O to complete before it can continue processing.
On the other hand, a transaction can continue processing when an asynchronous I/O is
requested. As a result, even the asynchronous I/O may affect the transaction response time.
Throughput can decrease over time if transactions require more synchronous I/O.
PM for Power Systems Graph Reference Document 73