4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 02003: Page Fault Rate Exceeds Max

02003: Page Fault Rate Exceeds Max

FILE: Paging Activity File
SAS FILE NAME: DAYS.SCPPAG01
SOURCE LOCATION: prefix.MICS.USER.SOURCE(DYRMFEXC)

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

PURPOSE:  Excessive page fault rate indicates an
overcommitment of real memory and resulting delays to tasks
in execution.

RATIONALE:  A page fault causes a task that is already in
real memory to be delayed, as well as usually causing a
physical page I/O.

DEFINITION:  This exception is detected when the page fault
rate (the rate of non-swap non-VIO page-ins, VIO page-ins,
and PLPA/CSA page-ins) exceeds the 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:

**  02003 PAGE FAULT RATE EXCEEDS MAX
*;
RATE=SUM(PAGPIN,PAGVIN,PAGSNI)/DURATION;
IF RATE GT rate THEN DO;
  EXCCODE='02003';SEVERITY='I';MGMTAREA='PERFORMANCE';
  EXCDESC1='PAGE FAULT RATE EXCEEDS MAX';
  EXCDESC2='PAGE RATE=' !! PUT(RATE,5.1) !! '/SEC';
  LINK HIT;
END;

THRESHOLD MODIFICATION:  The user should modify the rate
value according to the following convention:

rate - The maximum rate of page faults per second is
specified.  A rate threshold of 60 would appear as:

RATE GT 60