4. EXCEPTIONS › 4.3 Exception Descriptions › 10074 Prefetch Disabled No Read Engine Buffer 0

10074 Prefetch Disabled No Read Engine Buffer 0

FILE:  DB2 Data Base Activity File
SAS FILE NAME:  DETAIL.DB2DSD01
SOURCE LOCATION:  prefix.MICS.SOURCE(DB2DYEXC)

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

PURPOSE:  This exception provides the number of sequential
prefetch requests disabled because of an unavailable buffer
resource.  In this case, the buffer resource comes from
buffer pool 0.

RATIONALE:  This exception tracks the number of times buffer
pool 0 could not provide a buffer to perform a DB2 function.
It is very useful in determining number of buffers needed for
this pool.

DEFINITION:  This exception is noted when the DSDSPDF0 flag
is non-zero.

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:



/* ***************************************************/
/* EXCEPTION NUMBER:  10074                          */
/* TITLE:  PREFETCH REQUEST DISABLED DUE TO NO BUFFERS*/
/* FILE:  DB2DSD01                                   */
/* ***************************************************/

IF DSDSPDF0 GT 0 THEN DO;
 EXCCODE='10074';
 SEVERITY='W';
 MGMTAREA='PERFORMANCE';
 EXCDESC1='PREFETCH REQUEST DISABLED NO BUFFERS';
 EXCDESC2='BUFFER 0 '                 ||
          '   '                       ||
          'COUNT = '                  ||
           PUT(DSDSPDF0,6.)
           ;
 LINK HIT;
 END;