4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 01600: LPAR Partition Underutilized

01600: LPAR Partition Underutilized

FILE: PR/SM LPAR Config/Activity File
SAS FILE NAME: DAYS.HARLPC01
SOURCE LOCATION: prefix.MICS.USER.SOURCE(DYRMFEXC)

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

PURPOSE:  Detects an underutilized logical partition.

RATIONALE:  An underutilized logical partition may result
from lack of workload or may serve as an indication of
improper LPAR definition criteria, such as poorly defined
partition weights.  If such a partition is used for
production workloads, then service objectives may not be met.
Detection of low logical partition utilization may identify
periods of poor performance, permitting further investigation
of the critical resources.

For additional information concerning interpretation and
usage of these values, refer to Section 6.8 of this guide.

DEFINITION:  This exception is detected when the logical
partition processor utilization percentage is below the
site-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.

******************************************;
*** 01600 *** PR/SM LPAR UNDERUTILIZED ***;
******************************************;
IF (SYSID EQ 'rsys')
 THEN IF ((HEXLPID EQ 'id1' AND LPCPCVPU LT percent1) OR
          (HEXLPID EQ 'id2' AND LPCPCVPU LT percent2) OR
          (HEXLPID EQ 'id3' AND LPCPCVPU LT percent3))
  THEN IF ((HOUR GE hh1 AND HOUR LE hh2) AND
           (DAYNAME NE 'SAT' AND DAYNAME NE 'SUN'))
   THEN DO;
     EXCCODE='01600'; SEVERITY='W'; MGMTAREA='PERFORMANCE';
     EXCDESC1='PR/SM LPAR UNDERUTILIZED.  ID=' !! HEXLPID;
     EXCDESC2='LPAR ID=' !! HEXLPID !! ' WAS' !!
               PUT(LPCPCVPU,5.1) !! '% BUSY';
     LINK HIT;
   END;
THRESHOLD MODIFICATION:  Modify the recording SYSID, the LPAR
IDs, the percent values, and prime time according to the
following conventions:

rsys - The SYSID of the system whose measurements are to be
used to evaluate the exception condition.  If the evaluation
is to be made based on the information recorded by RMF
running in a system ID of SYS1, the statement would appear
as:

IF (SYSID EQ 'SYS1')

id - Specifies the logical partition ID, a two-character
hexadecimal number, with lead zero, if applicable, in quotes.

percent - Specifies the minimum logical processor utilization
for a particular LPAR.

A 30 percent threshold for LPAR ID 1, a 40 percent threshold
for LPAR ID 2, and a 50 percent threshold for LPAR ID C
appear as:

IF ((HEXLPID EQ '01' AND LPCPCVPU LT 30) OR
    (HEXLPID EQ '02' AND LPCPCVPU LT 40) OR
    (HEXLPID EQ '0C' AND LPCPCVPU LT 50))

prime time - Specifies the hour range and days of the week to
be included in the exception.  The hour of the day must be
within the hh1 through hh2 range.  The days of the week are
represented by the first three characters of their names.
Prime time specified as 8:00 am through 6:59 pm (18:59) on
weekdays only appears as:

IF ((HOUR GE 8 AND HOUR LE 18) AND
    (DAYNAME NE 'SAT' AND DAYNAME NE 'SUN'))

The time period to be included may already be defined by
means of the ZONE definition, which provides a simpler method
of selecting hours and days for processing.  If ZONE 1
corresponds to the desired time period, it appears as:

IF ZONE EQ '1'