HP NonStop G-Series - Manual (Page 47)

Configuring and Running Measurements
Measure User’s Guide — 520560-003
3 -5
Starting a Measurement
collects information about the amount of time the CPU was busy, the
INTR-BUSY-TIME counter records the amount of time the CPU spent handling
interrupts, the SWAPS counter records the number of pages the CPU swapped, and so
on.
Similarly, when you specify the DISC entity in a configuration, all predefined DISC
counters are activated when the measurement starts. The REQUESTS counter
records the number of requests the disk received, the READ-BUSY-TIME and
WRITE-BUSY-TIME counters determine the amount of time the disk spent reading and
writing data, and so on.
Each counter is one of these types:
For descriptions of the types of counters predefined for each entity type, the kind of
information each collects, the record structure for each entity, and descriptions of each
field in the record, see the Measure Reference Manual.
Starting a Measurement
To specify a data file name and start the measurement, use the START
MEASUREMENT command.
Typically, you specify a nonexistent data file, and MEASFH creates an unstructured file
(code 175). If you specify the name of a data file that already exists, MEASFH purges
the contents of that file so it can receive measurement data.
Accumulating Totals the number of bytes input or output to a file, disk, or other entity.
Busy Measures the time during which a resource is busy.
Elapsed Measures the time required for an event to take place, start to finish.
Fixed
Accumulating Totals the number of bytes input or output to a file, disk, or other entity.
This is a 64-bit accumulating counter type.
Incrementing Counts the number of times a particular event occurs (for example, swaps
and disk I/Os).
Max value Tracks the maximum value of a counter.
Max queue Tracks the maximum length of a queue.
Queue Measures the amount of time elements spent on a queue.
Queue-busy Measures the time during which there are elements on a queue.
Response time Tracks the time between a read of a terminal and the following write to the
same terminal.
Sampling Finds the approximate busy time for procedure code ranges.
Snapshot Records a value taken at a specific time, such as at the start of a
measurement.
Transaction Increments each time a response-time counter is bumped.