Foglight for JMX 5.9.8 - Application Servers Administration and Configuration Guide

Table 3. Advanced Nexus Recording settings.
Setting	Value
Collector Discovery Interval	The interval at which periodic metric collectors discover changes to the application server structure such as new applications, in seconds. NOTE: Only an integer value is permitted. The default is: CollectorDiscoveryInterval = 300;
Time Slice Size	The unit size in seconds. Only used with the max samples per time slice setting in the periodic metric collector configuration files. NOTE: Only an integer value is permitted. The default is: TimeSliceSize = 300;
Max Separation Value Size	The maximum size of request parameters that are read for separating requests. NOTE: The maximum separation value size is 999. The default is: MaxSeparationValueSize = 32;
Max Trace Value Size	The maximum value size for collected single trace parameter details. For more information, see Setting maximum display of characters for single trace parameters values.
Trace Parameter Exclusions	The exclusion list for request parameters that are considered sensitive and therefore should be ignored when collecting request traces. NOTE: This setting has no effect on request separation. This list may contain strings or regular expressions. The default values include regular expressions for name, address, password, and other common sensitive parameters.
Incomplete Request Timeout	The incomplete request timeout, in seconds. NOTE: Only an integer value is permitted. The default is: IncompleteRequestTimeout = 120;
Live Object Count Limit	The number of live objects that agents can track. For more information, see Setting memory usage for object tracking.
Live Object Lifespan Limit	The maximum amount of time an agent tracks live objects. For more information, see Setting memory usage for object tracking.

Setting maximum display of characters for single trace parameters values

Sets the maximum value size for collected single trace parameters details. Some parameters may contain a lot of information, and in some cases, not all the information may be useful to view. You can reduce the amount of information displayed in the value field.


	CAUTION: The higher the MaxTraceValueSize value, the more information saved to the database, and the higher the impact on performance overhead.

The default setting is: MaxTraceValueSize = 128.

To collect single trace parameter details, enable the Collect All Parameters option in the Application Servers Monitor > Requests view > Action column > Collect Traces dialog box.

For more information, see the Monitoring Requests section in the Foglight for Application Servers User Guide.

Figure 3. The following is an example of an HTTP Parameter Value:

Setting memory usage for object tracking

Sets the maximum amount of time an agent tracks live objects. Changing this value to a higher value allows more time to track and therefore, provides a better opportunity to identify true leaks in your environment.


	CAUTION: The higher the LiveObjectLifespanLimit value, the more memory used and the higher the impact on performance overhead.

The default setting is:

LiveObjectLifespanLimit = 900;

In addition to the LiveObjectLifespanLimit, you can also limit the number of live objects that agents can track. Increasing this value allows the agent to track more live objects concurrently, but uses more memory in the application server process. Decreasing this value makes it more likely that the agent will expire the live object before it is collected, but uses less memory.

The default setting is:

LiveObjectCountLimit = 524288;