HP Integrity NonStop J-Series - Manual (Page 89)

Guardian Performance Analyzer (GPA) User Guide
– (544541-006) Page 89 of 131
Other important parameter values shown in this chart are:

The page swap rate (SWAP RATE). As mentioned previously under System
Performance Summary , a page swap rate greater than 1 indicates a memory
shortage or overutilization of the CPU.

The number of pages of memory owned by the memory manager. Refer to your
SYSGEN output and note that at the end of each processor section are listed the
number of pages locked and the minimum pages. Before any processes are added
to a processor, the number of memory manager pages should be reduced by the
minimum pages value and the swap rate of the processor should be reviewed. If
either the current swap rate is greater than 0.25 or the adjusted page number
value is less than about 200, no additional processes should be added without
adding physical memory.

The message rate (MSG RATE) and the dispatch rate (DISP/SEC). Generally,
there are at least two dispatches associated with either a send or a receive
message.
The last line item on the chart gives the halt impact for each processor, the effect on
system performance if the processor were to fail. Example 4-12 shows that failure of
any one of the CPUs on \NODEA might have serious consequences. The term
MEMORY here means that failure of the CPU could result in a memory shortage in
one or more of the other processors which, in turn, could substantially degrade the
system‟s performance.
Example 4-13. Processor Load Balance and Performance Charts for \NODEB
CPU PROCESSOR LOAD BALANCE CHART
NUM
--- ROUNDED TO NEAREST TWO PERCENT (2%)
|----+----+----wwww^wwww-+----+----+----+----+----|
0 |+++++-------------^-->
1 |+++++-------------^-->
2 |++++------------->^
3 |+++---------> ^
|----+----+----wwww^wwww-+----+----+----+----+----|
0 1 2 3 4 5 6 7 8 9 1
0 0 0 0 0 0 0 0 0 0
0
CPU PERCENT BUSY -------------------------------->