Group buffer pool monitoring with the z/OS DISPLAY XCF,STR command

You can monitor group buffer pools with the DISPLAY XCF,STR command.

You can use z/OS® command D XCF,STR to get information about coupling facility structures:
  • CFRM policy definition
  • Preference list
  • Coupling facility name
  • Connections
  • Duplexing status
The following command displays information about GBP1 in group DSNDB0A: 
D XCF,STR,STRNAME=DSNDB0A_GBP1

This particular group buffer pool is duplexed, so you see information about both allocations of the structure (the old structure is the primary structure, and the new structure is the secondary one). The output is similar to the output that is shown in the following figure

:

Figure 1. z/OS Command D XCF showing group buffer pool information
DISPLAY XCF
STRNAME: DSNDB0A_GBP1
 STATUS: REASON SPECIFIED WITH REBUILD START:
           OPERATOR INITIATED
         DUPLEXING REBUILD
         REBUILD PHASE: DUPLEX ESTABLISHED
  POLICY SIZE    : 204800 K
  POLICY INITSIZE: 102400 K
  REBUILD PERCENT: 1
  DUPLEX         : ALLOWED
  PREFERENCE LIST: CACHE01  LF01
  EXCLUSION LIST IS EMPTY
 
 DUPLEXING REBUILD NEW STRUCTURE
 -------------------------------
  ALLOCATION TIME: 10/14/2002 17:01:48
  CFNAME         : LF01
  COUPLING FACILITY: ND01...
                     PARTITION: 0   CPCID: 00
  ACTUAL SIZE    : 102400 K
  STORAGE INCREMENT SIZE: 256 K
  VERSION        : AF6935AA 78004403
  DISPOSITION    : DELETE
  ACCESS TIME    : 0
  MAX CONNECTIONS: 32
  # CONNECTIONS  : 2
 
 DUPLEXING REBUILD OLD STRUCTURE
 -------------------------------
  ALLOCATION TIME: 10/14/2002 17:00:38
  CFNAME         : CACHE01
  COUPLING FACILITY: ND02...
                     PARTITION: 0   CPCID: 00
  ACTUAL SIZE    : 102400 K
  STORAGE INCREMENT SIZE: 256 K
  VERSION        : AF693567 9B48B802
  ACCESS TIME    : 0
  MAX CONNECTIONS: 32
  # CONNECTIONS  : 2
 
 CONNECTION NAME  ID VERSION  SYSNAME  JOBNAME  ASID STATE
 ---------------- -- -------- -------- -------- ---- ----------------
 DB2_DB1A         01 00010001 UTEC469  DB1ADBM1 002E ACTIVE NEW,OLD
 DB2_DB2A         02 00020001 UTEC469  DB2ADBM1 0031 ACTIVE NEW,OLD