TPDC Manual (G06.24+)

Using the SPAM Performance Data Charts and
Reports
Tandem Performance Data Collector (TPDC) Manual—526357-001
5-40
Program Disc File I/O Wait Shares (PGDIOWT)
Program Disc File I/O Wait Shares (PGDIOWT)
This 74-column chart provides a overview of logical disk file I/O wait times by
programs, where programs are all processes running from the same program object
file. The chart displays:
•
Program file name
•
Number of processes run from the program file
•
The program’s share of all logical disk file I/O wait time and a graph of this share
•
Cumulative share of all logical disk file I/O wait time
This chart uses the GLOBINFO, PGMTOTAL, PROGSUM, and PROGLIO entities.
Parameters used are:
•
LID—specifies the Measure Load ID
•
EXCLUDE—specifies a value under which to exclude the number of requests per
second
•
SECTION—specifies the report section number
The chart is sorted in descending order of logical disk file busy time.
Program Disc File I/O Wait Shares for System \CSO (Release D20)
---------------------------------
[Total = 14 msec/Sec]
LogIOs <-Shr% = %-age of Total--> Cum.
Program File Name /Secnd LTE Shr% 0 5 10 15 20 25 Shr%
-------------------------- ------ --- ==== +----+----+----+----+----+ ----
$SYSTEM .SYS00 .OSIMAGE 2.5 100.0 |************************>100.0
+----+----+----+----+----+
0 5 10 15 20 25
NOTE: An exclamation point (!) following a Program File Name
indicates that processes in the group are experiencing
an average wait time per disc file logical I/O that is
greater than the overall system average of 7.2 msec.
LTE: L = Lock waits, T = Timeouts or cancels, E = (lock) Escalations.