Troubleshooting › Global Data Integrity Facility Problems › z/OS Diagnostic Commands

z/OS Diagnostic Commands

Descriptions of the z/OS diagnostic commands follow.

DISPLAY GRS,CONFLICT

Displays information about a LOCAL ENQ conflict. The GRS component of z/OS is responsible for maintaining integrity in a single z/OS system. CA MII does not manage LOCAL ENQ conflicts, only GLOBAL conflicts. This command returns a display similar to the following:

D GRS,C
S=SYSTEM  SYSDSN   KEEWI01.TEST                                     
SYSNAME        JOBNAME         ASID     TCBADDR   EXC/SHR    STATUS
XE03      TESTENQ            0056       007D6D90 EXCLUSIVE    OWN   
XE03      KEEWI01A           003D       007E6858 EXCLUSIVE    WAIT  
XE03      KEEWI01B           003E       007E6858   SHARE      WAIT  
XE03      MIM119WK           0060       0064E840   SHARE      WAIT 
NO LATCH CONTENTION EXISTS

You can also use this command to identify a global ENQ conflict. You can tell that it is a GLOBAL ENQ conflict because the CA MIM address space owns the resource on the local z/OS system. This is normal and is referred to as the “Blocking ENQ.” CA MIM raises this ENQ on the local system to prevent access to a resource that is currently held on an external system as shown.

D GRS,C                                  
ISG343I 07.46.53 GRS STATUS 148          
S=SYSTEM  SYSDSN   KEEWI01.TEST                                     
SYSNAME        JOBNAME         ASID     TCBADDR   EXC/SHR    STATUS
XE13      MIM119WK           0091       0064E838 EXCLUSIVE    OWN   
XE13      BATCHJ01           003A       007FF3A0   SHARE      WAIT  
NO LATCH CONTENTION EXISTS   

To find out which system actually owns the resource, issue the following CA MIM command:

DISPLAY CONFLICT

This command returns a display similar to the following:

F MIM119WK,D CON
MIM0067I Command DISPLAY 212
MIM1028I CONFLICT display
  QNAME     RNAME                            Requestor      Type
  SYSDSN    KEEWI01.TEST                     S=XE03      HOLDS EXCL
                                             J=BATCHJ01  WAITS SHR

DISPLAY GRS,RES=(qname,rname)

Used to determine who owns a resource on the local system. The resource can or cannot be involved in a local or global ENQ conflict. You can use the * character to mask the remainder of the QNAME or RNAME. This command displays the following:

D GRS,RES=(SYSDSN,SYS2.CLIS*) 
ISG343I 10.46.16 GRS STATUS 787 
S=SYSTEM  SYSDSN   SYS2.CLIST 
SYSNAME       JOBNAME        ASID     TCBADDR   EXC/SHR  STATUS
XE07          USER001        001A     008FDE88  SHARE    OWN