I/O Queuing Reports › ERXT0347/EZXT0347: I/O Queuing - I/O Processors Report

ERXT0347/EZXT0347: I/O Queuing - I/O Processors Report

This report shows the usage of I/O processor (IOP) queues and delays caused by various I/O subsystems. It is broken down by I/O processor identifier. The data is summarized over all the intervals in the input data, EXTDATA type R78A.

The fields in the report are as follows:

IOP

I/O processor queue identifier.

ACTIVITY RATE

Average number of I/O requests placed in the IOP queue per second.

AVG QUE LENGTH

Average number of I/O requests waiting in the IOP queue.

IOP PC BUSY

Percentage of time the IOP was found busy, measured by taking samples.

IO STRT RATE

Average number of I/O requests started by the IOP per second. It should closely match the activity rate.

IO INT RATE

Average number of I/O interrupts processed by the IOP per second.

RETR ALL

Average percentage of retries among all I/O requests started (including retries).

RETR CP/DP/CU/DV BUS

Average percentage of retries that can be attributed to the selected channel path, director port, control unit, or device being busy.

RT/SSC ALL

Average ratio of retries to succesful I/O requests started, excluding retries.

RT/SSC CP/DP/CU/DV BUS

Average ratio of specific retries to successful I/O requests started. The retries are attributed to the selected channel path, director port, control unit, or device being busy.

1 2/20/yy                     I/O QUEUING - I/O PROCESSORS REPORT                                                        PAGE 1

 REPORT ID: EZXT0347                                    SYSPLEX:  PLEXC1
 SOURCE   : SMF 78-3                                     SYSTEM:  CA31
 FROM DATE: 08/02/12                                  FROM TIME:  23:59:00
   TO DATE: 08/02/13                                    TO TIME:  23:44:00

-
     ACTIVITY AVG QUE IOP PC IO STRT    IO INT   RETR  RETR   RETR   RETR   RETR   RT/SSC RT/SSC RT/SSC RT/SSC RT/SSC
 IOP   RATE    LENGTH  BUSY    RATE      RATE    ALL   CP BUS DP BUS CU BUS DV BUS  ALL   CP BUS DP BUS CU BUS DV BUS
0 00  1338.951    0.00  2.61  1338.861  1565.177  0.41  0.24   0.03   0.13   0.00   0.00   0.00   0.00   0.00   0.00
  01  1787.186    0.00  2.54  1787.178  1782.918  0.11  0.04   0.00   0.07   0.00   0.00   0.00   0.00   0.00   0.00
  02  2981.652    0.00  3.69  2981.649  3042.767  0.59  0.03   0.00   0.55   0.00   0.00   0.00   0.00   0.00   0.00
  03  3442.378    0.00  4.36  3442.373  3736.935  0.91  0.10   0.00   0.80   0.00   0.00   0.00   0.00   0.00   0.00
  04  2574.804    0.00  3.30  2574.793  2944.211  1.08  0.65   0.02   0.40   0.00   0.01   0.00   0.00   0.00   0.00
  05  3219.807    0.00  4.11  3219.540  3914.078  0.53  0.21   0.00   0.31   0.00   0.00   0.00   0.00   0.00   0.00
     15344.780    0.00  3.44 15344.397 16986.089  0.66  0.21   0.00   0.44   0.00   0.00   0.00   0.00   0.00   0.00