The following list provides a subset of MVS™ system commands that can be useful diagnostic
aids when the system logger encounters a problem. For a full description
of these commands, and a complete list of all MVS system commands, see
z/OS MVS System Commands.
- D GRS,Latch,Jobname=IXGLOGR to show all latches held by logger
address space.
- D GRS,ANALYZE,LATCH,DEPENDENCY,JOBNAME=IXGLOGR,DETAIL to show
the dependencies of all latch sets created in the logger address space.
See System logger latch conventions for a description of logger
latches.
- D GRS,RES=(SYSZLOGR,*) to show ENQs that are held by the logger.
The major name is SYSZLOGR. The minor name contains the log stream
name.
- D GRS,Ct o show any latch or ENQ contention.
Tip: The
preferred method of trying to determine ENQ contention is D GRS,ANALYZE,BLOCKER
and latch contention is D GRS,ANAYLZE,LATCH,BLOCKER,DETAIL.
- D GRS,RNL=A to show additional RNL information.
- D XCF,STR to display summary information about all coupling facility
structures that are in the sysplex.
- D XCF,STR,STRNAME=logger_structure to show details of the
specified logger structure.
- D XCF,COUPLE,TYPE=LOGR to display LOGR couple data set details.
- D TRACE,COMP=SYSLOGR to display the component trace status of
system logger.
- D LOGGER,options to display information about the system
logger. For details on the options that can be specified, see z/OS MVS System Commands.
To interpret the output of the D LOGGER command, see message IXG601I
in z/OS MVS System Messages, Vol 10 (IXC-IZP).
- SETLOGR FORCE to clean up logstream resources related to a system
logger logstream when the logstream becomes unusable. Logger will
attempt to release all the related resources for the logstream based
on the request.
- FORCE IXGLOGR,ARM to take down the logger address space. Do not
use CANCEL or FORCE without specifying ARM.
- START IXGLOGRS to bring up the system logger address space.
- D A,IXGLOGR to display the system logger address space.
- D LOGREC to display information about the logrec log stream.
- D C,HC to display information about the operlog log stream.