4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 00311: COMMON Page Duplexing Not Active

00311: COMMON Page Duplexing Not Active

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

SEVERITY          Impacting     (SEVERITY='I')
MANAGEMENT AREA   Availability  (MGMTAREA='AVAILABILITY')

PURPOSE      Indicates that the reliability enhancer is not
             in use.

RATIONALE    The facility of double-logging pages that
             change in the COMMON area is intended to save an
             unscheduled IPL if the primary COMMON paging
             data set becomes unusable.  This is done at some
             cost.

             The performance analyst should note whether or
             not COMMON is being duplexed to verify that the
             trade-off between reliability and performance
             that has been agreed to is in fact the one
             that has been implemented.

DEFINITION   This exception is noted when the data element
             TSOXCPDY (Intvls When COMMON Page Duplexing in
             Use) is found with a zero value.  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:

************************************************************;
*
** 00311
** COMMON PAGE DUPLEXING NOT ACTIVE
*;
IF TSOXCPDY = 0
 THEN DO;
  EXCCODE='00311'; SEVERITY='I'; MGMTAREA='AVAILABILITY';
  EXCDESC1='COMMON PAGE DUPLEXING NOT ACTIVE';
  EXCDESC2=' ENDTS=' || PUT(ENDTS,DATETIME19.2);
  LINK HIT;
END;



THRESHOLD     None required.  If your installation does not
MODIFICATION  find duplexing valuable, you may want to
              disable this exception.