Global GBP Statistics Detail window

Use the Global GBP Statistics Detail window to view statistics on coupling facility activity for the group buffer pool selected from the Global Group Buffer Pool Statistics window.

Figure 1. Global GBP Statistics Detail window

 DGOMSWBD       Global GBP Statistics Detail

                                             INTERVAL 2:54.251
                                                More:   - +

  Group buffer pool name . . . . . . . . . . . . :      GBP1
  Read hit . . . . . . . . . . . . . . . . . . . :       258
  Read miss directory hit. . . . . . . . . . . . :       258
  Read miss assignment suppressed  . . . . . . . :         0
  Read miss name assigned  . . . . . . . . . . . :       557
  Read miss cache full . . . . . . . . . . . . . :         0
  Changed page write hit . . . . . . . . . . . . :       705
  Clean page write hit . . . . . . . . . . . . . :         0
  Write miss cache full  . . . . . . . . . . . . :         0
  Directory entry reclaim  . . . . . . . . . . . :         0
  Data entry reclaim . . . . . . . . . . . . . . :       214
  XI Directory entry reclaim . . . . . . . . . . :         0
  Castout  . . . . . . . . . . . . . . . . . . . :       398
  Directory entry  . . . . . . . . . . . . . . . :       843
  Data entry . . . . . . . . . . . . . . . . . . :       183
  Total changed  . . . . . . . . . . . . . . . . :        67

 Command ===> ________________________________________________
  F1=Help     F2=Split      F3=Exit     F5=Auto   F6=History
  F7=Up       F8=Down       F9=Swap    F10=Delta F11=Interval
 F12=Cancel  F16=Look      F17=Collect

The following list describes some of the important fields that are shown in this panel:

Read miss assignment suppressed: The number of coupling facility read requests for a page, in which data was not returned, where the page name was not assigned in the coupling facility directory, and where directory name assignment is suppressed.
DB2® requests suppression of the directory entry assignment in cases where it does not have to register the page to coupling facility for cross-invalidation (XI). This is the case when Db2 is the only one in the group with Read⁄write interest in the page set or partition.
Read miss name assigned: The number of coupling facility read requests for a page, in which data was not returned, where the page name was not assigned in the coupling facility directory, but a directory entry was successfully assigned to the new name.
Read miss cache full: The number of coupling facility read requests for a page, in which the page name was not assigned to a coupling facility directory entry and where name assignment could not complete because of a lack of coupling facility storage resources.