NiFi JVM

NiFi JVM Dashboard

The NiFi JVM dashboard displays charts for the following JVM related metrics of one or multiple clusters.

• Show Aggregated: Displays the aggregated values of all nodes.
• Show Per Node: Displays the values per node.

JVM Memory Usage

The JVM Memory Usage chart displays the amount of JVM memory used by processes in the cluster based on the following metrics.

• Max Heap: The maximum amount of heap memory allocated by the JVM.
• Committed Non Heap: The amount of allocated memory other than the heap memory in the JVM.
• Heap Used: The amount of heap memory used by the JVM.
• Non Heap Memory: The amount of memory other than the heap memory in the JVM.

JVM Threads

The JVM Threads chart displays the following metrics of a thread in a cluster within a time frame.

• Thread Count: The number of threads.
• Runnable: The threads that are ready to run or currently running in the JVM.
• Terminated: The threads that have completed execution.
• Timed Waiting: The threads waiting for another thread to execute within a particular time.
• Blocked: The threads that are currently blocked waiting for a lock that is already being used by another thread.

GC Times

The GC Times chart collects and displays the following metrics of JVM garbage collection.

• Mark Sweep: The time taken for marking and sweeping phase of garbage collection in the JVM.
• Scavenge: The time taken for scavenging garbage collection in the JVM.