Redisplay of User Transaction Data

This part of the performance redisplay data can be selected

by initially entering the command REDISP TRANSACT, or
by entering the command TRANSACT while already viewing other performance redisplay data.

Figure 1. Layout of performance redisplay screen: Transaction data

 FCX101      CPU nnnn  SER nnnnn  Interval HH:MM:SS - HH:MM:SS    Perf. Monitor

 TIME >LOGN  ACT TR-T NT-T C1ES TR-Q NT-Q TR/S NT/S  ITR %PQ %IQ %LD %EL  Q1  Q
 08:14 1025  275 0.04 1.14  .52   .8 18.7 19.6 16.3  9.4   0  25   0   0  12  2
 08:15 1040  268 0.05 1.61  .51   .9 22.5 18.2 13.9  8.8   4  34   0   0  11
 08:16 1062  283 0.04 0.99  .52  1.0 15.3 21.0 15.4 10.6   0  24   0   0  20  2
 08:17 1084  303 0.04 1.40  .49  1.1 27.7 24.3 19.6 11.8   0  48   0   0  13  1
 08:18 1095  304 0.05 1.08  .48  1.1 17.9 21.4 16.6 10.5   3  35   5   0  17  1
 08:19 1112  288 0.04 0.89  .46  1.0 15.1 21.2 17.1 10.2   0  39   0   0  12  2
 08:20 1127  300 0.04 0.95  .48   .9 16.1 20.3 16.9 10.0   0  43   2   0  15  2
 08:21 1145  302 0.04 1.23  .50  1.0 24.5 23.2 19.8 11.5   0  16   0   0  13  3
 08:22 1160  313 0.04 2.21  .51  1.1 42.7 23.6 19.3 11.3   4  30   0   0  20  2
 08:23 1177  317 0.05 0.98  .51  1.2 19.6 25.2 19.8 11.7   0  48   0   0  11  2
 08:24 1185  304 0.04 1.06  .47  1.1 18.8 22.8 17.5 11.6   2  39   0   0  15  1
 08:25 1203  312 0.04 1.13  .45  1.0 21.7 24.3 19.1 11.3   0  30   0   0  20  1
 08:26 1225  318 0.04 1.12  .47  1.2 22.5 27.0 19.9 12.0   0  33   0   0  17  1
 08:27 1238  309 0.04 0.83  .44  1.3 16.3 27.6 19.5 13.1   0  30   0   0  13  1
 08:28 1251  321 0.04 0.72  .43  1.0 13.8 24.3 18.9 13.2   3  34   0   0  17
 08:29 1273  293 0.05 1.31  .46  1.2 22.6 22.2 17.0 11.1   5  51   2   0  25  1
 08:30 1288  322 0.05 0.89  .47  1.3 15.7 24.2 17.7 14.2   0  54   0   0  15  2
 08:31 1304  335 0.05 1.14  .49  1.3 22.9 25.7 19.9 14.1   0  45   0   0  15  1
 Enter 'GRAPHIcs' command for history graphics selection menu
 Command ===> _
 F1=Help  F4=Top  F5=Bot  F7=Bkwd  F8=Fwd  F10=Left  F11=Right  F12=Return

Only part of the available transaction data can be shown on the initial screen. Use the 'RIGHT' command, or press the corresponding PF-key for viewing the remainder of the variables.

Field Description for Transaction Data:

TIME

Time stamp, see 'CPU' data for details

LOGN

Number of users logged on at the end of the measuring interval

ACT

Number of users which have been active (i.e. used some CPU time or executed I/Os) during the last measuring interval

TR-T

Average elapsed time used for trivial transactions (UP and MP)

NT-T

Average elapsed time used for non-trivial transactions (UP and MP)

C1ES

Class 1 elapsed time slice: the time slice within which 85% of all class 1 transactions completed. This includes time spent in Q1 and E1 (class 1 dispatch and eligible lists), and it is a good indicator of system responsiveness to interactive user requests.

TR-Q

Average number of concurrently active users with trivial transactions (UP and MP) during the last interval

NT-Q

Average number of concurrently active users with non-trivial transactions (UP and MP)

TR/S

Average trivial transaction rate during the last measuring interval (UP and MP)

NT/S

Average non-trivial transaction rate (UP and MP)

ITR

The 'system internal throughput ratio', i.e. the number of transactions executed on the system per second of total CPU time

%PQ

Percentage of in-queue users (users which were either in the dispatch list or the eligible list) found in page wait state during the interval

%IQ

Percentage of in-queue users found in I/O wait state during the interval. This is calculated as the sum of the wait state percentages for

I/O wait (CCW translation)
I/O active

as reported in the user wait state screens USTAT and USTLOG.

%LD

Percentage of 'loading' in-queue users during the interval, i.e. of users with a very high page read activity

%EL

Percentage of 'in-queue' users in an eligible list (in resource wait) during the interval

Q1

Number of class 1 users in the dispatch list at the end of the interval

Qx

Number of non-class 1 users (in either of the classes 0, 2 or 3) in the dispatch list at the end of the interval

Q1L

Number of in-queue class 1 users in 'loading' state

QxL

Number of in-queue non-class 1 users (in either of the classes 0, 2 or 3) in 'loading' state

E1

Number of class 1 users in the eligible list at the end of the interval

Ex

Number of non-class 1 users (in either of the classes 0, 2 or 3) in the eligible list

E1L

Number of eligible class 1 users in 'loading' state

ExL

Number of eligible non-class 1 users (in either of the classes 0, 2 or 3) in 'loading' state