Pathway/iTS System Management Manual (G06.24+)

HP NonStop Pathway/iTS System Management Manual—426748-002
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5
Tuning Your System Using Statistics
Statistics and System Tuning
This section describes the HP NonStop Pathway/iTS terminal control process (TCP)
and the statistics that the TCP produces. You can use the statistics generated by
transaction processing functions in the PATHMON environment to detect bottlenecks
in TCP processing. Based on careful analysis of these statistics, you can reconfigure
your PATHMON environment to eliminate some performance degradations.
For information on gathering other statistics about your PATHMON environment and
for instructions on reconfiguring the environment, see the TS/MP System Management
Manual.
This section is divided into two parts:
•
The first part describes the TCP and the tasks it performs.
•
The second part describes the statistics that reflect how well the tasks are being
performed.
Some factors affecting system performance are not represented in these statistics.
Such factors generally involve contention for system resources. Examples are:
•
Paging by the operating system incurred by the TCP
•
The ability of the TCP to handle I/O terminations promptly
TCP Tasks
The TCP allocates internal resources and maintains queues for many of its operations
and tasks, such as:
•
Link management
•
Memory management
•
Checkpointing
•
Gathering statistics
The following subsections describe the TCP tasks and the queues associated with
these tasks.