How Metrics are Calculated

CPU percentage used

Scaled CPU time used * 100
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Uncapped CPU time configured for the partition

Database CPU percentage used

Database CPU time * 100
-----------------------------------
Uncapped CPU time configured for the partition

Average interactive response time

SUM(Job response time of all interactive jobs)
--------------------------------------------------------------
SUM(number of transactions of all interactive jobs)

Maximum interactive response time

Highest Job response time
-------------------------------------
Number of transactions for that job

Disk unit percentage used

Disk Unit Capacity - Disk Unit Space Available * 100
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Disk Unit Capacity

Disk unit I/O requests per second

Number of Disk Unit Reads + Number of Disk Unit writes
------------------------------------------------------
Collection Interval Elapsed Time

Average request size

(Number of blocks read + Number of blocks written) * sector size
----------------------------------------------------------------
(Number of blocks read + Number of blocks written)/1024

Number of reads per second

Number of blocks read
--------------------------------
Collection Interval Elapsed Time

Number of writes per second

Number of blocks written
--------------------------------
Collection Interval Elapsed Time

Average amount of data per read

(Number of blocks read * sector size/Number of disk unit reads)
--------------------------------
2^10 (1,024)

Average amount of data per write

(Number of blocks written * sector size/Number of disk unit writes)
--------------------------------
2^10 (1,024)

Disk unit percentage busy

Number of samples taken - Number of times arm not busy * 100
--------------------------------------
Number of samples taken

Disk unit average response time

Disk service time + Disk wait time
---------------------------------------------
Number of disk unit writes + Number of disk unit reads