Processor Utilization for the Average Transaction per Hour
Hourly Processor Utilization for the Average Transaction Graph.
The Processor Utilization for the Average Transaction per Hour graph shows the amount of CPU
time used per transaction.
The Facts section of the graph displays the average transaction characteristics for the current
and previous two months. It also shows the CPU time in seconds, the average number of I/Os,
and the average number of synchronous I/Os.
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.
Transaction response times can increase over time if transactions require more synchronous I/O.
An increase in page fault rates can be a common cause of the increase in synchronous I/O. The
addition of logical views that require immediate maintenance of the view (an index) can be
another cause of the increase in synchronous I/O’s.
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PM for Power Systems Graph Reference Document
