r , STOP ISPOOL I ICPTRACEI ITAPE I L .I CLOSE lUTODISK If SPOOL is specified, the VM/370 Monitor data collection to a
spool file or tape is stopped or the CP internal trace table
is stopped. If no option is specified and the VM/370 Monitor is active, then data collection will be terminated whether a
spool file or tape is in use. Internal tracing can only be
stopped by specific use of the CPTRACE option. If automatic VM/370 Monitor data collection is active when the MONITOR STOP SPOOL command is entered, monitoring ceases and will not start
again (even if the current time is within the bounds of the TIME operand of the SISMON macro) unless the system fails or
is shut down and reloaded.
If CPTRACE is specified it terminates the internal trace table
event tracing. Event recording ceases but the pages of
storage containing the CP internal trace table are not
released. Tracing can be restarted at any time by issuing the MOBITOR START CPTRACE command. If TAPE is specified it stops data collection by MOlITOR on
the tape. A zero mask is immediately stored in control
register 8, thus disabling MONITOR CALL interruptions. The
last partially filled page is written out, two tape marks are
written, and the tape is rewound and unloaded. The two buffer
pages, which were obtained at the time the MCNITOR START TAPE command was processed, are released.
Note: The CPTR1CE and TAPE or SPOOL operands of the MOlITOR coiiand are completely separate functions. Co •• ands affecting
the status of one function have no effect on the other.
closes the current spool file, making it available to the
reader of the recipient virtual machine and continues monitoring with a new spool file. This option may be used
when the Yft/370 ftonitor is spooling the collected performance
data and you want to reduce the data collected thus far. }
overrides the specification in the SISMOB macro for automatic
monitoring. This only affects the automatic startup of monitoring& If autoBatic Bonitoring is already active, only a MOlITOR STOP command will stop it manually. In general, any attempts to override the definitions of
the SISMON macro instruction with co.mands are temporary. 10 Monitor checkpointing is attempted so that an IPL or crash
causes full restoration of the initial automatic monitoring
definitions. 100 VM/370 Operator's Guide

TIME {FROM h 1 : m1 TO h2:.2} FOR hh: •• ALL NONE temporarily overrides the automatic monitoring start and stop times defined by the SYSMON macro instruction. FRO! h1:m1 TO h2:m2 specifies a start and stop· time in hours and minutes
using a 24-hour clock. (The default start time is 09:00 and
end time is 17:00). FOR specifies the length of time data
should be collected; it is intended to facilitate performance
data collection over short periods ef time for testing or benchmarking. Automatic monitoring must be in effect before
this parameter is specified (AUTO=YES in the SYSMON macro of DMKSYS or MONITOR AUTO ON command). ALL specifies 24=hour
monitoring and BONE specifies that monitoring can only take
place under the direction of operator or system analyst. If automatic monitoring is i.minent and
is specified, the period of monitoring defined
macro is overridden. r , LIMIT n INOSTOPI ISTOP I ISAMPLEI L .J
the FOR option
by the SIS!CN temporarily overrides the LIMIT options of the SISKON macro.
n is a decimal number from 10 to 50000 that represents the maximum buffer count in each spool file. If it is necessary
to change the automatic monitoring specification after the
limit is reached and the spool file is closed, the STOP or NOSTOP option may be specified. If you wish to change the automatic monitoring specification without changing the limit
number, specify an asterisk (*) instead of a decimal number for n.
If SAMPLE is specified, n indicates the number of samples of PERFORM, USER, or DASTAP data (or any combination of the
three) that are to be collected before the spool file is
closed. After n samples of data have been collected, the
monitor spool file is closed and moved to the virtual reader
of the data reduction virtual machine. ftonitoring continues
uninterrupted using a new spool file. Automatic monitoring is
specified by using the SYSMON macro instruction in DMKSIS at system generation. SEEKS {INCLUDE raddr raddr ••• } EXCLUDE raddr raddr ••• DELETE DISPLAY This command option is used to centrol selective seeks monitoring. This enables the user to obtain seeks trace data
on only those non-2305 DASD devices that are specifically
requested. The com.and allows a list of devices to be
established for data collection and permits display or
deletion of an existing list. This decreases both the
overhead involved in collecting the data and the processor time to reduce the data.
The INCLUDE option followed by a list of non 2305 D1SD device
addresses, specifies the devices for which seeks data is
collected. The appropriate MONITOR ENABLE and START commands must be issued to invoke this function. Section 3. CP Commands 101