HP NonStop G-Series - Manual (Page 139)

Balancing and Tuning a System
Measure User’s Guide — 520560-003
7 -3
Tuning a System
Tuning a System
Because tuning a system can easily create as many problems as it solves, start tuning
activities only if system users are not satisfied with system performance. When you are
notified of a performance problem, the measurement data file from the ongoing system
measurement gives you an excellent starting point for investigating the problem.
Figure 7-1 on page 7-4 shows typical steps used to tune a NonStop system. As you
work on the system:
•
Allow enough time
•
Make one change at a time
•
Check the effect before making another change
Each change you make to the system affects a number of different system resources,
not just the resource on which you are working. You need to measure and understand
the systemwide effect of one change before trying a second.
At some sites, analyzing performance and modifying the system are the domain of
separate groups. If this is the case at your site, warn the appropriate groups that you
will be making numerous requests in the coming days as you work on improving
system performance.