Using the Interval Monitor › Line I/O Detail (PF14)

Line I/O Detail (PF14)

 PM-Rnn.n SYSTEM71         CA, Inc.                  V71      08.348 11:43:47.66
 CMD-->                                                             Window : 02

   02 08:30 LIDT Line I/O Detail                                              >
 Line     Line             Line          PTERMs    Read    Read   Write   Write
 Name     Type             Status       Defined   Total  Errors   Total  Errors
 UCFLINE  UCF LINE DRIVER  IN-SERVICE        4        0       0       0       0
 CCILINE  DDS VTAM         IN-SERVICE       20        0       0       0       0
 CONSOLE2 OPERATOR CONSOLE IN-SERVICE        1        0       0       0       0
 VTAM     VTAM INTERFACE   IN-SERVICE      110    44706       0   44707       0
 VTAM92   VTAM INTERFACE   CLOSED            0        0       0       0       0

 PM-Rnn.n SYSTEM71         CA, Inc.                  V71      08.348 11:43:47.66
 CMD-->                                                             Window : 02

   02 08:30 LIDT Line I/O Detail                                           <  >
   Line       Write  PTE_RPL PTE_RPL    Read    Read   Write   Write     RPL
   Name      Errors Requests   Waits   Waits    Time   Waits    Time   Waits
   UCFLINE        0        0       0       0  .0000S       0  .0000S       0
   CCILINE        0        0       0       0  .0000S       0  .0000S       0
   CONSOLE2       0        0       0       0  .0000S       0  .0000S       0
   VTAM           0    89538   32797      92   1.03S   29412   2:07M       0
   VTAM92         0        0       0       0  .0000S       0  .0000S       0

 PM-Rnn.n SYSTEM71         CA, Inc.                  V71      08.348 11:43:47.66
 CMD-->                                                             Window : 02

   02 08:30 LIDT Line I/O Detail                                           <
   Line      PTE_RPL PTE_RPL    Read    Read   Write   Write     RPL     RPL
   Name     Requests   Waits   Waits    Time   Waits    Time   Waits    Time
   UCFLINE         0       0       0  .0000S       0  .0000S       0  .0000S
   CCILINE         0       0       0  .0000S       0  .0000S       0  .0000S
   CONSOLE2        0       0       0  .0000S       0  .0000S       0  .0000S
   VTAM        89538   32797      92   1.03S   29412   2:07M       0  .0000S
   VTAM92          0       0       0  .0000S       0  .0000S       0  .0000S

Screen Description

The Line IO Detail screen displays detailed information about each teleprocessing (TP) line defined in the DC/UCF network for the current interval. For each line, the screen indicates the status and displays access statistics related to line use.

Line Types

The following table lists the TP line types defined at system generation. For each line type, the equivalent TYPE parameter specification for the system generation LINE statement is included.

Line Status

The following statuses can be indicated for a TP line:

Using This Screen

To request the Line IO History screen, press [PF9].

What To Look For

• Look at the status of lines defined to your system.
• Look at the number of I/O errors relative to the number of reads and writes.
• If the number of RPL waits is not close to zero, increase the request parameter list (RPL) count in the system generation LINE statement.
• Look for average I/O times:
  • Read Time divided by the number of Physical Reads
  • Write Time divided by the number of Physical Writes

  High I/O times can result from large numbers of I/O error lines that contain large numbers of high volume terminals or printers.