4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 06039: Dynamic Log Latch Conflict Rate Exceeds Standard

06039: Dynamic Log Latch Conflict Rate Exceeds Standard

    FILE:            IMS System Activity
    SAS FILE NAME:   DETAIL.IMSISY01
    SOURCE LOCATION: sharedprefix.MICS.SOURCE(DYIMSEXC)

    SEVERITY:        Warning       (SEVERITY='W')
    MANAGEMENT AREA: Performance   (MGMTAREA='PERFORMANCE')

    PURPOSE:  Identifies that latch processing may be over-
committed.

    RATIONALE:  An abnormally high number here may represent
resource over-utilization.  Latches are required during sync
point and backout processing.  There is little remedy for
this situation other than reducing the number of PSTs or
decreasing the time required for processing via hardware
changes.  Only large values should be of concern.

    DEFINITION:  This exception is detected when the dynamic
log latch conflict rate exceeds the installation-defined
limit.  It does not apply to IMS 4.1 and higher systems.

    EXCEPTION STATEMENTS:  The SAS statements identifying the
exception situation and describing the condition are stored
in the source member named in SOURCE LOCATION and are
described below:

*
**  06039
**  DYNAMIC LOG LATCH CONFLICT RATE EXCEEDS STANDARD
*;
IF ISYPSLDL > dynamic-log-latch-conflict-rate
 THEN DO;
  EXCCODE='06039'; SEVERITY='W'; MGMTAREA='PERFORMANCE';
  EXCDESC1=
  'DYNAMIC LOG LATCH CONFLICT RATE EXCEEDS STANDARD';
  EXCDESC2='DYN LOG LATCH CONFL RATE ='
           || PUT(ISYPSLDL,7.2);
  LINK HIT;
END;

    THRESHOLD MODIFICATION:  Modify the value used for the
dynamic-log-latch-conflict-rate.