Using the Interval Monitor › Journal Detail (PF11)

Journal Detail (PF11)

 PM-Rnn.n SYSTEM71         CA, Inc.                  V71      08.348 10:59:28.65
 CMD-->                                                             Window : 02

   02 10:00 JRDT Journal Detail                                               >
 Journal Name                File Name   Block   Bytes  Blocks   First    Last
                                          Size Written Written     RBN     RBN
 J1JRNL                       J1JRNL      2004  467096     238    4999     282
 J2JRNL                       J2JRNL      2004       0       0       0       0
 J3JRNL                       J3JRNL      2004       0       0       0       0
 J4JRNL                       J4JRNL      2004 3826528    1932    3071    4999

 PM-Rnn.n SYSTEM71         CA, Inc.                  V71      08.348 10:59:28.65
 CMD-->                                                             Window : 02

   02 10:00 JRDT Journal Detail                                            <  >
  Journal Name                   Last    Read    Read   Write   Write  Buffer
                                  RBN   Waits    Time   Waits    Time   Waits
  J1JRNL                          282      12  .1964S     238  13.21S       0
  J2JRNL                            0       0  .0000S       0  .0000S       0
  J3JRNL                            0       0  .0000S       0  .0000S       0
  J4JRNL                         4999       3  .0563S    1932  54.88S       0

 PM-Rnn.n SYSTEM71         CA, Inc.                  V71      08.348 10:59:28.65
 CMD-->                                                             Window : 02

   02 10:00 JRDT Journal Detail                                            <
  Journal Name                 Buffer  Buffer    JBEE    JBEE     JBC     JBC
                                Waits    Time   Waits    Time   Waits    Time
  J1JRNL                            0  .0000S       0  .0000S       0  .0000S
  J2JRNL                            0  .0000S       0  .0000S       0  .0000S
  J3JRNL                            0  .0000S       0  .0000S       0  .0000S
  J4JRNL                            0  .0000S       0  .0000S       0  .0000S

Screen Description

The Journal Detail screen displays access statistics for each journal file defined to the DC/UCF system for the current interval. For each journal, the screen identifies the file name and shows a breakdown of access statistics.

Using This Screen

To request the Journal History screen, press [PF9].

What To Look For

• Look for a high number of journal read waits which indicate rollback operations. The only way to control read waits is to eliminate abends. During a rollback a single buffer is dynamically allocated and none of the existing journal buffers are used. Use the Application Monitor batch reports (see the CA IDMS Performance Monitor System Administration Guide) to determine which transactions are experiencing the journal waits.
• Look for a high number of JBC waits. This field indicates the number of times a task had to wait for space in the journal buffer. You can increase the number of pages in the journal buffer to remedy this problem. The field is incremented when IDMSDBIO determines that all the pages in the buffer are exclusively held and must therefore wait until a buffer page becomes available.