Migration From Traditional Models - IBM 170 Servers Manual

2.11 Migration from Traditional Models

This section describes a suggested methodology to determine which server model is appropriate to
contain the interactive workload of a traditional model when a migration of a workload is occurring.
It is assumed that the server model will have both interactive and client/server workloads.
To get the same performance and response time, from a CPU perspective, the interactive CPU utilization
of the current traditional model must be known. Traditional CPU utilization can be determined in a
number of ways. One way is to sum up the CPU utilization for interactive jobs shown on the Work with
Active Jobs (WRKACTJOB) command.
***************************************************************************
CPU %: 33.0
Type options, press Enter.
2=Change 3=Hold
8=Work with spooled files
Opt Subsystem/Job
__ BATCH
__ QCMN
__ QCTL
__ QSYSSCD
__ QINTER
__ DSP05
__ QPADEV0021
__ QSERVER
__ QPWFSERVSD
__ QPWFSERVS0
**************************************************************************
(Calculate the average of the CPU utilization for all job types "INT" for the desired time interval for
interactive CPU utilization - "P" in the formula shown below.)
Another method is to run Collection Services during selected time periods and review the first page of the
Performance Tools for iSeries licensed program Component Report. The following is an example of this
section of the report:
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
©
Copyright IBM Corp. 2008
Work with Active Jobs
Elapsed time: 00:00:00
4=End 5=Work with
13=Disconnect ...
User Type
QSYS SBS
QSYS SBS
QSYS SBS
QPGMR BCH
QSYS SBS
TESTER INT
TEST01 INT
QSYS SBS
QUSER BCH
QUSER PJ
Chapter 2 - Server Performance Behavior
Active jobs:
6=Release 7=Display message
CPU % Function
0
0
0
0 PGM-QEZSCNEP
0
0.2 PGM-BUPMENUNE
0.7 CMD-WRKACTJOB
0
0
0
152
Status
DEQW
DEQW
DEQW
EVTW
DEQW
DSPW
RUN
DEQW
SELW
DEQW
32