4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 06021: PSB Pool High Water Mark Exceeds Standard

06021: PSB Pool High Water Mark 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 the PSB pool may require
    enlarging.

    RATIONALE:  Insufficient storage for this pool, which
contains all non-resident PSBs, will cause ACBLIB I/O's for
the PSBs which are flushed for insufficient space in this
pool.  The number monitored is the percentage of the pool
that high water mark represents.  A number close to 100 % may
indicate insufficient pool size.  The only way to determine
sufficiency is to increase pool size until the high water
mark remains constant and this percentage number decreases.

    DEFINITION:  This exception is detected when the PSB pool
high water mark percentage exceeds the installation-defined
limit.


    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:

*
**  06021
**  PSB POOL HIGH WATER MARK EXCEEDS STANDARD
*;
IF ((ISYPSBHW/ISYPSBSZ) * 100) > high-water-mark-percentage
 THEN DO;
  X = ((ISYPSBHW / ISYPSBSZ) * 100);
  EXCCODE='06021'; SEVERITY='W'; MGMTAREA='PERFORMANCE';
  EXCDESC1=
  'PSB POOL HIGH WATER MARK EXCEEDS STANDARD';
  EXCDESC2='PSB POOL HWM='
           || PUT(X,7.2) || '% OF AVAILABLE POOL ' ;
  LINK HIT;
END;

    THRESHOLD MODIFICATION:  Modify the PSB pool
high-water-mark-percentage to a value between 0 and 100.