4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 01300: Control Unit I/O Rate Below Min

01300: Control Unit I/O Rate Below Min

    FILE: Control Unit Activity File
    SAS FILE NAME: DAYS.HARCUA01
    SOURCE LOCATION: prefix.MICS.USER.SOURCE(DYRMFEXC)

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

    PURPOSE:  Identify low control unit I/O rates which may
indicate I/O conflicts.

    RATIONALE:  During periods when work is expected in the
system, a low I/O rate may result from I/O conflicts.

    DEFINITION:  This exception is detected when the control
unit I/O rate is below the installation defined minimum.

    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:

** 01300 CONTROL UNIT I/O RATE BELOW MIN;
*;
IF RMFVER > '08 ' THEN CUAPSSIO=CUAACTRT;
IF CUAPSSIO ^= .  THEN IF CUAPSSIO < rate
 AND (DAYNAME='MON' OR DAYNAME='TUE' OR DAYNAME='WED' OR
      DAYNAME='THU' OR DAYNAME='FRI')
     AND (HOUR >= hh1 AND HOUR <= hh2)
 THEN DO;
  EXCCODE='01300'; SEVERITY='W'; MGMTAREA='PERFORMANCE';
  EXCDESC1='CONTROL UNIT I/O RATE BELOW MIN';
  EXCDESC2=  'I/O RATE=' || PUT(CUAPSSIO,6.1) ||
    '/SEC, CONTROL UNIT=' || CUADDR;
  LINK HIT;
END;

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

    rate - The minimum rate of SIO's per second is specified.
A threshold rate of 2 would appear as:

    CUAPSSIO < 2

    prime time  - The hour range and days of the week to be
included in the exception are specified.  The hour of the day
must be within the hh1 through hh2 range.  Prime time
specified as 8am through 6:59 pm (18:59) would appear as:

    AND ( 8 <=HOUR AND HOUR<= 18 )

    The days of the week are represented by the first three
characters of their names.  They must be enclosed in quotes,
separated with OR's.  Prime time specified as MONDAY through
FRIDAY would appear as:

    AND (DAYNAME='MON' OR DAYNAME='TUE' OR DAYNAME='WED'
      OR DAYNAME='THU' OR DAYNAME='FRI' )

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

    AND ZONE='1'