Flight Recorder
It's an event-based data collector that records the execution of Java programs and JVMs.
JVM flags
-XX:FlightRecorderOptions
is a comma-delimited list of properties in$key=$value
form:name
sets the recording name.defaultrecording
(boolean;true
orfalse
) toggles starting the recording at JVM startup.settings
specifies the path to a JFR configuration file.delay
sets the time delay for recording starting.duration
specifies the length of time the recording should run for.filename
sets the destination filename.compress
(boolean) toggles gzip.maxsize
controls the size of the ring buffer into which events are recorded.maxage
controls the maximum age of events within the ring buffer.
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