4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 02800: Performance Group Page-In Rate Exceeds Max

02800: Performance Group Page-In Rate Exceeds Max

    FILE: Performance Group Activity File
    SAS FILE NAME: DAYS.SCPPGA01
    SOURCE LOCATION: prefix.MICS.USER.SOURCE(DYRMFEXC)

    SEVERITY: Impacting            (SEVERITY='I')
    MANAGEMENT AREA: Performance   (MGMTAREA='PERFORMANCE')

    PURPOSE:  Identify workloads experiencing high paging.

    RATIONALE:  For online systems, a high page-in rate can
cause response time degradation.  For batch systems, it can
mean overinitiation and unnecessarily elongated run times.

    DEFINITION:  This exception is detected when the page-in
rate per second for selected performance groups exceeds an
installation-defined maximum.

    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:

  /* ****************************************************
  **  02800 PERFORMANCE GROUP PAGE-IN RATE EXCEEDS MAX **
  **************************************************** */
IF (PERFGRP=perfgrp1 AND PGAPSPIN > rate1) OR
   (PERFGRP=perfgrp2 AND PGAPSPIN > rate2)
 THEN DO;
  EXCCODE='02800'; SEVERITY='I'; MGMTAREA='PERFORMANCE';
  EXCDESC1='PERFORMANCE GROUP PAGE-IN RATE EXCEEDS MAX';
  EXCDESC2='RATE=' || PUT(PGAPSPIN,6.1) ||
    '/SEC, GROUP=' || PUT(PERFGRP,3.) ||
         ', NAME=' || PERFGRPN;
  LINK HIT;
END;


    THRESHOLD MODIFICATION:  The user should modify the
perfgrp and rate values according to the following
conventions:

    perfgrp - The performance group number of the workload to
be examined.

    rate - The maximum page-in rate for the performance group

    A test for a page-in rate in excess of 5 pages per second
for performance group 6 would appear as:

    (PERFGRP=6 AND PGAPSPIN > 5)