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You use three commands to configure thresholds on your system. To add a threshold, use the ADDTHRESHOLD command To delete a threshold, use the DELETETHRESHOLD command To change the configuration of a threshold, use the MODIFYTHRESHOLD
command
Before you change a threshold in any way, you may want to issue the
SHOW command for the resource to see the current settings. For example,
to display the state of the File_Extents resource, at the
Thmgr: prompt enter: To add a threshold | |
Use the ADDTHRESHOLD command to add a
maximum of two thresholds to a resource monitored by Threshold Manager.
If this is the first time you are adding
a threshold to a resource, you can also enter your choices for
notification and control. (Later, if you need to change any of the parameters
for the threshold, you can do so with the MODIFYTHRESHOLD
command.) You can issue the ADDTHRESHOLD command at the Thmgr: prompt
or from a job. The syntax is: ADDTHRESHOLD (AT) [RESOURCE=] {ResourceName} [THRESHOLD=] {ThresholdValue} [NOTIFY=] {[YES] [NO]} [CONTROL=] {[JOB_SESSION_CONTROL] [NULL_CONTROL]} | Parameter | Definition |
|---|
| RESOURCE | One of the list of valid resource names
displayed when you issue the SHOW command.
| | THRESHOLD | An integer value that indicates
the resource limit expressed as a percentage. For example,
a value of 80 indicates that the threshold is set at 80%
of capacity.
| | NOTIFY | One of two responses, YES, which enables
notification (i.e., displays messages on the system console when
this resource exceeds the threshold) or NO, which disables
notification. The default is YES.
| | CONTROL | One of two responses,
JOB_SESSION_CONTROL, which limits job and session logons if the
threshold is crossed, and NULL_CONTROL, which does not limit
job and session logons. The default is NULL_CONTROL.
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For example, to add an 80% utilization level
threshold to the locality_list_entries resource, enter:
Thmgr: ADDTHRESHOLD Locality_List_Entries 80 YES
JOB_SESSION_CONTROL
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In this example, the last two parameters, YES
and JOB_SESSION_CONTROL indicate the type of resource
control for Locality_List_Entries. If this resource
exceeds 80% utilization, then: a message will appear on the console
(unless notifications have been disabled globally, in which case no
threshold information appears on the console) no new users or jobs will be able to log onto the system
The default for notification is YES; the default for control is
NULL_CONTROL (which means that Threshold Manager does not prohibit
new jobs and sessions when a threshold has been crossed).
To add a new threshold that uses these defaults, it isn't necessary
to specify the parameters. So, for example,
to add a 60% utilization threshold to the CM_Ports resource,
at the Thmgr: prompt enter:
Thmgr: ADDTHRESHOLD CM_Ports 60
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In this example, when the CM_Ports resource exceeds the 60%
utilization level, the system displays a message to
that effect but continues to permit job and session logons. | | | |  | NOTE:
Before you configure Threshold Manager, it is important to understand the
effect on the system when the JOB_SESSION_CONTROL is associated with a
threshold. When such a threshold is exceeded, no users can
log onto the system. To quickly override this control,
enter the DISABLEMANAGER (DM) command. | | | | |
To delete a threshold | |
Use the DELETETHRESHOLD command to delete a threshold
from a resource and to cancel all notification and control options
associated with the resource. You can enter the command at the Thmgr: prompt or from a job.
The syntax is: DELETETHRESHOLD (DT) [RESOURCE=] {ResourceName} [THRESHOLD=] {ThresholdValue} | Parameter | Definition |
|---|
| RESOURCE | One of the list of valid resource names
displayed when you issue the SHOW command.
| | THRESHOLD | An integer value that indicates
the resource limit expressed as a percentage. For example,
a value of 80 indicates that the threshold is set at 80%
of capacity.
|
For example, to delete
an 80% threshold from the Shared_Global_Space resource, enter:
Thmgr: DELETETHRESHOLD Shared_Global_Space 80
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To modify a threshold | |
Use the MODIFYTHRESHOLD command to modify any of the
system resources controlled by Threshold Manager.
You can change any or all of the following: one of the threshold values for the resource the control, so that Threshold Manager either does, or does not, permit
new jobs and sessions to log on once the threshold is exceeded the notification, so that Threshold Manager either displays or supresses
notifications about the threshold.
You can enter the MODIFYTHRESHOLD command at the Thmgr: prompt or
from a job. The syntax is: MODIFYTHRESHOLD (MT) [RESOURCE=] {ResourceName} [OLDTHRESHOLD=] {OldThresholdvalue} [NEWTHRESHOLD=] {NewThresholdvalue} [NOTIFY=] {[YES] [NO]} [CONTROL=] {[JOB_SESSION_CONTROL] [NULL_CONTROL]} | Parameter | Definition |
|---|
| RESOURCE | One of the list of valid resource names
displayed when you issue the SHOW command.
| | OLDTHRESHOLD | The existing threshold for this resource,
which is a percentage value expressed as an integer. This is a required parameter.
| | NEWTHRESHOLD | The new threshold for this resource, which is
a percentage value expressed as an integer. If you do not want to modify
the threshold, but want to modify control or notification, enter positional commas for this parameter.
| | NOTIFY | One of two responses, YES, which enables
notification (i.e., displays messages on the system console when
this resource exceeds the threshold) or NO, which disables
notification. The default is YES.
| | CONTROL | One of two responses,
JOB_SESSION_CONTROL, which limits job and session logons if the
threshold is crossed, and NULL_CONTROL, which does not limit
job and session logons. The default is NULL_CONTROL.
|
For example, to change the utilization threshold
for the File_Descriptors resource from the 80% to the 85%
level, enter:
Thmgr: MODIFYTHRESHOLD File_Descriptors 80 85
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Or, for example, to change the control for the Virtual_Storage
resource from off to on, enter:
Thmgr: MODIFYTHRESHOLD Virtual_Storage 80 80 ,,
JOB_SESSION_CONTROL
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Since all parameters are positional, you can choose how to enter
multiple parameters for a Threshold Manager command.
For example, to change notification for the
Virtual_Space_Cache resource from off to on, you can specify
each parameter explicitly
(including those values you are not changing) by entering:
Thmgr: MODIFYTHRESHOLD Virtual_Space_Cache 80 80 YES
NULL_CONTROL
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Or, you can use commas for the parameters that you are not going to modify,
and enter this instead:
Thmgr: MT Virtual_Space_Cache 80 ,, YES
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| | | | | NOTE:
Before you configure Threshold Manager, it is important to understand the
effect on the system when the JOB_SESSION_CONTROL is associated with a
threshold. When such a threshold is exceeded, no users can
log onto the system. To quickly override this control,
enter the DISABLEMANAGER (DM) command. | | | | |
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