4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 02501: Pct Page/Swap Data Set Busy Exceeds Max

02501: Pct Page/Swap Data Set Busy Exceeds Max

FILE: Page/Swap Data Set Activity File
SAS FILE NAME: DAYS.SCPPSD01
SOURCE LOCATION: prefix.MICS.USER.SOURCE(DYRMFEXC)

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

PURPOSE:   Identify overutilized page/swap data sets

RATIONALE:  As the utilization of each page/swap data set
increases, the delay to paging increases exponentially.  This
exception identifies those page/swap data sets with high
utilization.  Consider moving the data sets to different
devices/control units/channels as appropriate.  Note that
this utilization is as seen by the Auxiliary Storage Manager
(ASM) and thus reflects data set busy time.  The ASM is
unaware, and does not consider, the device busy time or know
about any other data sets on the device.

DEFINITION:  This exception is detected when the percent
page/swap data set busy 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:

**  02501 PCT PAGE/SWAP DATA SET BUSY EXCEEDS MAX
*;
IF PSDPCUSE GT percent
 THEN DO;
  EXCCODE='02501';SEVERITY='I';MGMTAREA='PERFORMANCE';
  EXCDESC1='PCT PAGE/SWAP DATA SET BUSY EXCEEDS MAX ';
  EXCDESC2='BUSY=' !! PUT(PSDPCUSE,5.1) !!
         '%, VOL=' !! VOLSER !! '(' !! PUT(DEVNUM,HEX4.)!!
         '), DSN=' !! PSDDSN;
  LINK HIT;
END;

THRESHOLD MODIFICATION:  The user should modify the percent
value according to the following conventions:

percent - The maximum percent busy is specified.  A 75
percent threshold would appear as:

PSDPCUSE GT 75