HP NonStop G-Series - Manual (Page 137)

Measure User’s Guide — 520560-003
7 -1
7
Balancing and Tuning a System
Tuning a system lets you take full advantage of its capabilities to provide optimum
performance to all users. This requires detailed knowledge of the system with which
you are working: its hardware, applications, daily use, peak use, and so on.
The first step in system tuning often is balancing the system. In a transaction
processing environment, this means spreading the workload evenly across all
hardware and software resources that make up the system; for example, distributing
CPU usage evenly across all CPUs, distributing disk usage evenly across all disk
processes, distributing line usage evenly across all lines, and so on.
A system workload consists of the processes executing on that system. A workload
might not be static but instead be subject to periods of peak use over various times of
the day, week, month, or year. Each process uses a different mix of system resources.
Therefore, when you move a process to balance one resource (for example, CPU use),
you must be aware of the effect of that process on other system resources, particularly
during peak-period system usage.
This section describes basic steps for balancing and tuning a NonStop system using
Measure data:
The steps in this section generally work well in a transaction processing environment. If
you are not working in such an environment, consult a performance analyst before
using these guidelines.
For more information on performance products and analysis techniques for NonStop
systems, see
Related Reading on page xii.
Topic Page
Balancing a System 7-2
Tuning a System 7-3