4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 00307: BLDL Not in Use

00307: BLDL Not in Use

FILE              TSO System Activity
SAS FILE NAME     DETAIL.TSOTSO01
SOURCE LOCATION   sharedprefix.MICS.SOURCE(DYTSOEXC)

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

PURPOSE      Warns of possible performance degradation due to
             high activity on LNKLSTxx directories.

RATIONALE    The MVS fixed or pageable BLDL facilities are an
             important means of reducing I/O to the
             directories of what is usually a long list of
             LNKLSTnn data sets.

DEFINITION   Code is provided to note this exception when any
             of the following data elements are found with a
             nonzero value:

             TSOXBLDN - Intvls When BLDL Not in Use
             TSOXBLDX - Intvls When BLDL Not in Collating Seq

             See Appendix B for more information on this
             data element.

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

************************************************************;
*
** 00307
** BLDL NOT IN USE
*;
IF TSOXBLDN > 0
    OR TSOXBLDX > 0
 THEN DO;
  EXCCODE='00307'; SEVERITY='W'; MGMTAREA='PERFORMANCE';
  EXCDESC1='BLDL NOT IN USE';
   EXCDESC2=' ENDTS=' || PUT(ENDTS,DATETIME19.2);
  LINK HIT;
END;

THRESHOLD     If you are running "dynamic BLDL," you may want
MODIFICATION  to disable this exception because some
              implementations of it give the appearance of an
              incorrectly ordered BLDL table.