TPDC Manual (G06.24+)

Using the SPAM Performance Data Charts and
Reports
Tandem Performance Data Collector (TPDC) Manual—526357-001
5-45
Relative CPU Balance (RCBCHRT)
Relative CPU Balance (RCBCHRT)
This 74-column chart displays the relative CPU balance. The measure of balance is
each CPU’s CPU-QTIME expressed as a percentage of the sum of all CPU-QTIME for
all CPUs (shown as Shr% in the chart). The chart displays the component parts of this
Shr%: memory queuing, other CPU queuing, and actual CPU usage.
This chart uses the GLOBINFO and CPU entities.
Parameters used are:
•
LID—specifies the Measure Load ID
•
SECTION—specifies the report section number
Relative CPU Balance Chart for System \CSO (Release D20)
--------------------------
The measure of balance is each CPU's CPU-QTIME, expressed as a percentage
of the sum of all CPUs' CPU-QTIMEs, and shown as 'Shr%' in this chart.
[ Exact Balance: Shr% = 25.0 per CPU ]
<--Shr% = %-age of all CPU Queueing & Usage--> Cum.
CPU TotQ MemQ Shr% 0 10 20 30 40 50 60 70 80 90 Shr%
--- ---- ---- ===== +----+----+----+----+----+----+----+----+----+ -----
1 .2 .0 37.4 |*****++++++++++++++ | 37.4
2 .1 .0 27.0 |*****+++++++++ | 64.4
0 .1 .0 21.8 |***++++++++ | 86.2
3 .1 .0 13.8 |*++++++ | 100.0
+----+----+----+----+----+----+----+----+----+
0 10 20 30 40 50 60 70 80 90
# = Memory Q'ing, * = CPU Q'ing, + = CPU Usage.
In a well-balanced, steady-state, system with adequate capacity for
instantaneous peaks, you would expect to see:
1. An almost-vertical right-hand edge to the chart,
2. NO pound signs [#], and
3. Fewer asterisks [*] than plus signs [+] on each line.
For faster CPU models (e.g. the NonStop (tm) Cyclone System), it may be
acceptable for the number of asterisks [*] to exceed the number of plus
signs [+], since each queued request can be serviced more rapidly.