Measure Reference Manual

Queue-Busy Counters
Queue-busy counters measure the time during which a resource accessed through a queue is busy.
They are used to measure device busy time in the ServerNet environment where multiple requests
(I/Os) can be queued to a device at the same time.
Units Displayed As...Output Value Is...Attribute Setting
a percentage of the interval
length
Percent of time busy during the interval.REPORT RATE is ON.
ms, sec, hr, day, or wkTotal amount of time the queue was busy
during the interval, independent of how many
REPORT RATE is OFF.
requests were on the queue at any time. For
example, for two processes placed on the
queue simultaneously, if both processes are
queued for one second and one of the
processes remains queued for two more
seconds, the total queue-busy time is three
seconds.
Total amount of time that there were elements
on the queue, expressed in microseconds.
REPORT FORMAT is STRUCTURED.
For an example of a queue-busy counter, see the DEVICE entity counter READ-QBUSY-TIME
(page 185).
In H-series and J-series RVUs, there are two types of Queue Busy counters:
• QBUSY counters, maintained with conventional timers
• TCELLQBUSY counters, maintained with timer cells
For an overview of timer cells and related counters, see Timer Cell Counters (page 143).
Response Time Counters
Response time counters measure the interval, in microseconds, between a read from a terminal
and the subsequent write to it. Whenever a value is added to a response time counter, a
corresponding transaction counter is advanced.
Units Displayed As...Output Value Is...Attribute Setting
ms, sec, hr, day, or wkAverage response time for each transaction.REPORT RATE is ON.
ms, sec, hr, day, or wkAccumulated response time.REPORT RATE is OFF.
Accumulated response time, expressed in
microseconds.
REPORT FORMAT is STRUCTURED.
In a report with RATE ON, the response time counter is a special case of a queue time counter in
that the accumulated response time value is divided by a transaction count.
For an example of a response time counter, see the TERMINAL entity counter RESPONSE-TIME
(page 360).
Counters Overview 141