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Run Heavy Garbage Collector

Vernalis Garbage collection extension for KNIME Workbench version 1.30.2.v202105111932 by Vernalis (R&D), UK

This node runs a 'heavy' garbage collection. A number of garbage collection cycles are run. Between each collection, there is a delay, during which System.runFinalization() is called.

It reports the amount of used memory before and after to the console log (at the INFO level), and also the total amount of memory available to the JVM


Number of Garbage Collections
The number of Garbage collection calls to make
Delay between collections (ms)
The delay (in milliseconds) between each GC call

Input Ports

Optional input port

Output Ports

Output port

Best Friends (Incoming)

Best Friends (Outgoing)



To use this node in KNIME, install Vernalis KNIME Nodes from the following update site:


A zipped version of the software site can be downloaded here.

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