TPDC Manual (G06.24+)

Using the SPAM Performance Data Charts and
Reports
Tandem Performance Data Collector (TPDC) Manual—526357-001
5-34
Logical Disc File I/O Wait Shares (LDFIOWT)
•
The date and time of the measurement taken
•
The system measured
•
The numbers and types of CPUs
•
The total, average, low, and high values for key performance metrics
This chart uses the GLOBINFO entity.
Parameters used are:
•
LID—specifies the Measure Load ID
•
SECTION—specifies the report section number
Logical Disc File I/O Wait Shares (LDFIOWT)
This 74-column chart provides a overview of logical disk file I/O wait time distribution. It
is ordered by descending file busy time (summed over all opens of any given logical
disk file), so the files on which applications spend the longest time waiting are at the
top of the list. The chart displays:
•
File name
•
Logical I/Os per second
•
Flags for nonzero lock waits
MEASURE Load ID: G1530MC1
================ ========
System: \CSO (Release D20)
------- --------
Date: 08/02/93 (MON)
From: 15:30:16
To: 16:30:41 (Window = 3624.90 seconds)
CPUs: 4 (TXP 0, VLX 4, CLX 0, CYC 0)
TOTAL AVERAGE LOWEST HIGHEST
------- ------- ------- -------
Real Memory Pages 49152 12288 12288 12288
Estimated Free Pages 26356 6589 5627 8175
Static Processes 216 54 40 68
Transient Processes 0 0 0 0
Dispatches/Second 207.4 51.8 25.3 65.6
Total CPU Busy 38.3% 9.6% 6.0% 14.1%
Process Busy 32.4% 8.1% 5.3% 12.6%
Interrupt Busy 5.8% 1.5% .7% 1.8%
CPU Queue Length - .1 .1 .2
Memory Queue Length - .0 .0 .0
Swaps/Second .3 .1 .0 .1
Process Overhead .1% .0% .0% .0%
Send (Dynabus) Busy .3% .1% .0% .1%
TMF Transactions/Second - - - -
TMF Transaction Time (msec) - - - -
Logical Disc I-O's/Second 23.8 - - -
Logical Disc I-O Time (msec) - 7.2 - -
Records Used/Accessed Ratio - - - -
Disc Cache Hits/Second 36.8 12.3 3.9 21.1
Physical Disc I-O's/Second 5.4 1.8 .5 3.6