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SNMP Agents: Configuration: Counter Monitors
Column Display Related Tasks Related Topics
A counter monitor indicates whether an attribute is operating below a specific threshold, and it can automatically raise or lower the threshold.
The monitor periodically polls an attribute whose value is an integer and compares the attribute value with a high threshold that you define. It generates a notification if the attribute value equals or exceeds the high threshold. An offset increases the threshold each time the threshold is crossed, and a modulus decreases the threshold.
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Name Description Name The name that you specified when you created the monitor.
Monitored MBean Type The MBean type that defines the attribute you want to monitor. Do not include the
MBeansuffix. For example,ServerRuntime.MBean Attribute:
SNMPCounterMonitorMBean.MonitoredMBeanTypeChanges take effect after you redeploy the module or restart the server.
Monitored MBean Name The name of the MBean instance that you want to monitor. If you leave the name undefined, WebLogic Server monitors all instances of the MBean type that you specify in Monitored MBean Type.
If you target SNMP agents to individual Managed Servers, make sure that the MBean instance you specify is active on the Managed Servers you have targeted. For example, if you specify
MServer1as the name of a ServerRuntimeMBean instance, this monitor will only function if you target an SNMP agent either to the Administration Server or to a Managed Server namedMServer1.Do not enter the full JMX object name of the MBean instance. Instead, enter only the value of the object name's
Name=namename-value pair. To create unique MBean object names, WebLogic Server encodes several name-value pairs into each object name. One of these pairs isName=name. For example:
"MedRec:Name=MedRecServer,
Type=ServerRuntime"In the previous example, specify
MedRecServeras the name of the MBean instance.MBean Attribute:
SNMPCounterMonitorMBean.MonitoredMBeanNameChanges take effect after you redeploy the module or restart the server.
Monitored Attribute Name The name of an MBean attribute to monitor. This attribute must be in the WebLogic Server MIB.
MBean Attribute:
SNMPCounterMonitorMBean.MonitoredAttributeNameChanges take effect after you redeploy the module or restart the server.
Polling Interval The frequency (in seconds) that WebLogic Server checks the attribute value.
MBean Attribute:
SNMPCounterMonitorMBean.PollingIntervalMinimum value:
1Maximum value:
65535Changes take effect after you redeploy the module or restart the server.
Threshold Specifies a value that triggers the Counter Monitor to generate a notification.
The monitor generates a notification the first time the observed value transitions from below the threshold to at or above the threshold. While the observed value remains at or above the threshold, the Counter Monitor does not generate additional notifications. If the observed value falls below the threshold and then later equals or exceeds the threshold, the Counter Monitor does not generate an additional notification.
You can specify an offset value to cause this threshold value to increase each time the observed value equals or exceeds the threshold. The first time the observed value equals or exceeds the new threshold value, this monitor generates a notification and adds the offset value to the new threshold value.
For example, if you set Threshold to 1000 and Offset to 2000, when the observed attribute equals or exceeds 1000, the Counter Monitor sends a notification and increases the threshold to 3000. When the observed attribute equals or exceeds 3000, the Counter Monitor sends a notification and increases the threshold again to 5000.
MBean Attribute:
SNMPCounterMonitorMBean.ThresholdMinimum value:
0Offset An integer value to be added to the threshold value each time the observed value equals or exceeds the threshold.
MBean Attribute:
SNMPCounterMonitorMBean.OffsetMinimum value:
0Modulus An integer value to be subtracted from the threshold value when the threshold value is crossed.
If Modulus is 0, a notification is generated each time the agent polls the monitored attribute and its value still exceeds or equals the threshold value.
If Modulus is larger than 0, the value of the modulus is subtracted from the threshold each time the threshold is crossed.
MBean Attribute:
SNMPCounterMonitorMBean.ModulusMinimum value:
0
- Create counter monitors
- Target counter monitors
- Delete SNMP monitors
- Stop generating notifications
- Verify notification generation
- WebLogic SNMP Management Guide
- WebLogic SNMP MIB Reference
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