SYSMON Macro the amount of spool space that can be used by the automatic
monitoring facility. It can also be used to create several small
monitor spool files, rather than one large file and, for instance,
give the data reduction facility an opportunity to start processing
the morning's data while collecting the afternoon's data. 'limit'
can be any decimal number between 10 and 50000. When determining
the value for 'limit', take into consideration the classes of data
collection enabled, the size of the associated records, the
sampling interval and remember that each monitor buffer contains
approximately 4000 bytes of data space.
Specifying SAMPLE allows the installation analyst t6 define the
rate at which spool files will be produced. Since sampled data is
collected at very precise intervals of time, according to the value
specified in the MONITOR INTERVAL command (default 60 seconds), the
spool file may be consistently and repeatedly closed. Monitor spool
files obtained in this manner contain performance data covering
consecutive, and equal intervals of time and containing the same number of PERFORM, DASTAP, and, possibly, USER (if no users logged
on or off) records. This capability could form the basis of a real
time performance analysis facility.
r , IBUFFS=cpu defaultl I BUFFS=n 1
L J specifies the number of data collection buffers needed by the
monitor to avoid suspension occurrences. Data collection
suspension occurs when output to tape or spool files cannot keep
ahead of the collection of data and an overrun condition occurs. By increasing the number of monitor buffers the suspension
occurrences can be reduced or eliminated. The default depends on
the processor on which the system is running. (See the VM/37Q description of the MONITOR command.) If
the user is not satisfied with the defaults, he may specify any
number of buffers from 1 to 10. SYSMON USERID=ANALYST,AUTO=YES,ENABLE=(PERFORM), TIME=ALL,BUFFS=l x
This example specifies automatic monitoring for 24 hours a day using
only the PERFORM class of data collection and one buffer. The spool
file created is practically unlimited in size, taking the 50000 default
and will be sent to the ANALYST virtual machine's reader each midnight
or at system restart or shutdown. The spool file class is the default M. !Q!e: All of the above automatic monitoring specifications may be
overridden by the operator or system analyst using the MONITOR command. Part 2. Defining Your VM/370 System 179

SYSJRL {llJacro SYSJRL Macro
The SYSJRL macro is used to specify the inclusion of the journaling
and/or password suppression facility.
r
Name Operation SYSJRL r , IJOURNAL=NO I I JOURN AL=YES I L ..J Operands r , I I , JOURN AL=YES I L ..J
r , I I, STQUERY=YES I L ..J
r , I,LOGUID=OPERATORI I,LOGUID=useridi . . - r , 1.&.10GL{llJT= (2,3,4) I I L ..J
r , I,LN!UIQ::OPERATOE.I I,LNKUID=userid I L ..J
r , I,LNKL{llJT::j2,5,10) , , , LNKLMT= (x, y, z) I L
r , I.&.PSUPRS::NO_I I , PSUPRS=YES I L ..J
..J
indicates whether or not the journaling facility is to be operative
in the system being generated.
r , ISTQUERY=NO I ,STQUERY=YES I L ..J
indicates whether or not the ability to SET and QUERY the
journaling function should be a part of the system being generated. YES may only be specified if JOURNAL=YES is also specified.
r , I LOGUID=OPERATOR I ILOGUID=userid I L ..J
is the userid that should receive the indication that an invalid
logon password count has been reached or exceeded. 180 IBM VM/370 Planning and System Generation Guide