Environmental Information Events Generated by the JVM when a FlightRecorder Snapshot is Taken are Now Enabled in WLDF
(Doc ID 1507378.1)
Last updated on SEPTEMBER 12, 2022
Applies to:Oracle WebLogic Server - Version 10.3.4 and later
Information in this document applies to any platform.
The WebLogic Diagnostic Framework (WLDF) and JRockit Flight Recorder (JFR) work together to monitor various characteristics of the JVM runtime: see Using WLDF with Oracle JRockit Flight Recorder for more information. The amount of such data which is collected can be controlled by choosing an appropriate Diagnostic Volume, where Low volume collects the least data but is also the least intrusive on the performance of the system. An enhancement request was made to allow monitoring of certain JVM events even at low volume because they have minimal impact on runtime performance, including:
- Java Virtual Machine/CPU Information (vm/cpu_info)
- Java Virtual Machine/Initial System Property (vm/system_properties)
- Java Virtual Machine/JVM Information (vm/info)
- Operating System/Initial Environment Variable (os/environment and os/processes)
- Thread Start/Stop events (java/thread_end and java/thread_start)
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