Chapter 10 Monitoring Data Property Attributes
This chapter describes the following topics:
Overview of Attribute Editor
The module data properties provide additional information about Sun Management Center modules.
The Attribute Editor enables you to customize the following monitoring criteria for
these properties:
-
Set alarm thresholds for defined alarms
-
Specify actions to take when alarm conditions occur
-
Change the interval at which data updates on the screen
-
Define schedules for creating log files of historical data points
The Attribute Editor has one or more tabs at the top of the window that enable
you to switch between different panels. These tabs differ depending on the selected
object. The following tabs are available and are described in the identified sections:
Info Tab in the Attribute Editor
The Info panel shows additional information about the selected object.
The specific information differs depending on the selected object.
Alarms Tab in the Attribute Editor
The Alarms tab enables you to set alarms thresholds only for those data properties
that have associated simple alarms. Simple alarms use the rCompare rule,
which is described in Appendix D, Sun Management Center Software Rules. For information about simple alarms, see Table 10–1.
Simple alarms are based on thresholds. A monitored data property is greater
than, less than, not equal to, or equal to a single threshold value. By contrast,
complex alarms occur when a set of conditions becomes true. For more information about
defining, acknowledging, and working with alarms in Sun Management Center, see Chapter 12, Managing Alarms.
Note –
You need the appropriate security permission to set an alarm threshold.
See Chapter 18, Sun Management Center Security for
more information.
The following table shows common simple alarm limits for monitored properties.
The alarm limits are also displayed in the Parameter Description field. You can set
thresholds for one or more of these alarm limits for selected data properties.
Table 10–1 Common Simple
Alarm Limits in Sun Management Center Software
|
Alarm Limit
|
Description
|
|
Critical Threshold (>)
|
Critical (red) alarm occurs if a value exceeds the limit in this field.
|
|
Alert Threshold (>)
|
Alert (yellow) alarm occurs if a value exceeds the limit in this field.
|
|
Caution Threshold (>)
|
Caution (blue) alarm occurs if a value exceeds the limit in this field.
|
|
Critical Threshold (<)
|
Critical (red) alarm occurs if a value is below the limit in this field.
|
|
Alert Threshold (<)
|
Alert (yellow) alarm occurs if a value is below the limit in this field.
|
|
Caution Threshold (<)
|
Caution (blue) alarm occurs if a value is below the limit in this field.
|
|
Alarm Window
|
Alarm occurs only during this time period. For example, if you type day_of_week=fri, an alarm occurs only if the alarm condition exists on a
Friday. If an alarm condition exists on Tuesday, no alarm is registered.
|
Actions Tab in the Attribute Editor
The Actions tab appears only if you can define alarm actions for the current
data property. The Actions panel enables you to instruct the software to perform a
predetermined action if an alarm occurs.
Note –
Acceptable actions include sending an email or executing scripts that
are stored in the /var/opt/SUNWsymon/bin directory. These scripts
execute with root permissions.
For example, you might define an action so that an email is sent to a system
administrator whenever a critical alarm is generated for the Load Average Over the
Last Five Minutes data property.
As illustrated in Figure 10–1, you can define specific actions to occur in any of the following instances:
-
When a particular alarm severity (critical, alert, caution, or intermediate)
occurs
-
When an alarm closes
-
When any change in alarm condition happens
Note –
The check boxes to the right of the Action buttons enable you to specify
automatic or manual execution of a specific alarm action. By default, all actions
are set for automatic execution.
Figure 10–1 Attribute Editor
Actions Panel for a Monitored Property
When you click the Actions button, the Action Dialog Selection window appears.
This window enables you to create or modify the registered alarm actions. You can
perform one of the following actions:
-
Send an email
-
Execute a script
-
Clear the alarm
For more information about defining an alarm action, see To Register an Alarm Action.
Refresh Tab in the Attribute Editor
The Refresh panel enables you to set the refresh interval for the selected
object. The refresh interval is the interval between the times when the Sun Management Center agent
samples the monitored property.
Note –
Only some data properties enable you to modify the refresh interval.
For information about setting the refresh interval, see To Set a Refresh Interval.
History Tab in the Attribute Editor
The History panel enables you to save older data for a monitored property.
For example, a history of data points could be recorded every 120 seconds, as specified
in the Sample Interval field. You can store this information in one of two places:
-
Disk file
There are two types of disk files: circular
and text. These files are located in the /var/opt/SUNWsymon/log directory.
-
Memory cache
If you store information in the memory cache,
you must also indicate how many data points should be saved in the Max Size (sample)
field.
Note –
You can view the history data in a graph by opening the graph for the
selected monitored property. If you have selected memory cache, the graph is displayed
with the historical data.
Using the Attribute Editor
The Attribute Editor provides features that support various activities. Some
of these activities use other features in addition to the Attribute Editor. Information
about performing simple Attribute Editor-only functions, such as defining intervals
for history logs and screen refreshes, is provided here. Detailed information about
alarm-related functions is provided in Chapter 12, Managing Alarms.
To Open the Attribute Editor for
a Specific Data Property
You can open the Attribute Editor for a specific data property value.
For some data properties, you can also access the Attribute Editor for a column of
values. For more information, see To Open the Attribute Editor for a Data Property Column.
-
Navigate through the topology or hierarchy
view until you have accessed a data property table.
-
Place your cursor in the value section of
the table and use either of the following methods:
The Attribute Editor window shows specific information about the selected data
property. The displayed tabs depend on the specific data property that you selected.
For information about defining alarm thresholds for the selected data
property, see Managing and Controlling Alarms and Alarm Management Examples.
To Open the Attribute Editor for a Data
Property Column
Choosing a data property column, rather than a specific data property
value, enables you to define attributes for all values in that column. For example,
consider the CPU Utilization Table. If you open the Attribute Editor for the column
% CPU User Time, you could define alarm thresholds and actions for all CPUs. If you
open the Attribute Editor for a specific % CPU User Time value, such as the value
that applies to CPU 1, any alarm threshold or action that you defined would apply
only to that specific CPU.
-
Navigate through the topology or hierarchy
view until you have accessed a data property table.
-
Click the column heading for the column
in which you are interested.
-
To access the Attribute Editor, use one
of the following mechanisms:
The Attribute Editor window shows specific information about the selected data
column. For information about defining alarm thresholds for the selected data column,
see Managing and Controlling Alarms and Alarm Management Examples.
To Set a Refresh Interval
The refresh interval indicates, in seconds, how frequently an agent acquires
data. The following example illustrates how to set a refresh interval for a property
in the System Load Statistics module.
-
Click the Module Browser tab in the Details
window.
-
Click the expansion icon next to the Operating
System icon in the hierarchy tree view.
The Operating System modules are
displayed.
-
Click the expansion icon next to the Kernel
Reader icon.
The Kernel Reader properties are displayed.
-
Double-click the System Load Statistics
icon.
The System Load Statistics properties table is displayed.
-
Select the table cell for Load Averages
Over the Last 5 Minutes.
-
Click the Attributes button.
The Attribute Editor window is displayed.
-
Click the Refresh tab button.
The refresh panel is displayed.
-
Type a value in seconds in the Refresh Interval
field or click the Advanced button.
For example, 300 seconds equates to
five minutes.
-
To apply the refresh interval and close
the Attribute Editor window, click the OK button.
Data for System Load
Statistics are acquired every five minutes.
Note –
The agent uses less CPU cycles if you provide a larger refresh interval.
To Set a History Interval
-
Open the Attribute Editor for the data property
on which you want to set the history information.
For example, follow
these steps to access the Attribute Editor for Load Averages Over the Last 5 Minutes:
-
Click the Module Browser tab in the Details
window.
-
Click the expansion icon next to the Operating
System icon in the hierarchy tree view.
-
Click the expansion icon next to the Kernel
Reader icon.
-
Double-click the System Load Statistics
icon.
-
Select the table cell for Load Averages
Over the Last 5 Minutes.
-
Click the Attributes button.
-
Click the History tab.
The history
panel is displayed.
-
Type a value in seconds in the Sample Interval
field or click the Advanced button.
For example, to collect a history
data point every two minutes, type 120 in the Sample Interval field.
-
Select Save History as Disk File or Save
History in Memory Cache.
-
To save history as a disk file:
-
Determine the file type, either circular
or text.
-
A circular file has a predefined length of 1000 lines. If the amount
of data that is written to the file exceeds that length, then the file rewrites from
the beginning.
-
A flat text file has no predefined length. Information is appended
to the flat file until you stop the process or until the disk space is exceeded. Use
this feature if you need to keep history files for data warehousing purposes.
-
For a text file, type the file name in the
Text File Name field.
If you do not choose a file name for your text file,
data are saved automatically in the /var/opt/SUNWsymon/log/agent_default.history file.
The file name cannot contain special characters, such
as / or #.
-
To save history in a memory cache, type
the number of history data points in the Max Size (sample) field.
For
example, if you set this field to 1000, only the most recent 1000 data points are
stored in the memory cache. Any older data points are discarded. These data points
can be graphed. See To Create a Graph of a Monitored Data Property for more information.
-
To apply your history file changes and close
the History panel, click the OK button.
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