4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 02909: Percent CSA Allocated Exceeds Max

02909: Percent CSA Allocated Exceeds Max

FILE: Virtual Storage System Usage File
SAS FILE NAME: DAYS.SCPVSM01
SOURCE LOCATION: prefix.MICS.USER.SOURCE(DYRMFEXC)

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

PURPOSE:  Detect excessive Common Storage Area (CSA) use.
This exception is defined in terms of percent.  Exception
02905 may also be used to detect this condition in terms of
the absolute size of CSA allocated.

RATIONALE:  When sufficient CSA storage is not available, the
operating system usually crashes.  Excessive CSA usage can
occur either through normal workload growth or as a result of
improper CSA storage management.

DEFINITION:  This exception is detected when the percent of
CSA storage allocated 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:

/* *******************************************
**  02909 PERCENT CSA ALLOCATED EXCEEDS MAX **
******************************************* */
IF VSMACSLP NE .  THEN IF VSMACSLP GT percent
 THEN DO;
  EXCCODE='02909'; SEVERITY='I'; MGMTAREA='PERFORMANCE';
  EXCDESC1='PERCENT CSA ALLOCATED EXCEEDS MAX';
  EXCDESC2='ALLOCATED=' !! PUT(VSMACSLP,4.) !! '%';
  LINK HIT;
END;

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

percent - The maximum percent of CSA allocated is specified.
An 85 percent threshold would appear as:

VSMACSLP GT 85