Swap Management

NiFi keeps FlowFile information in memory (the JVM) but during surges of incoming data, the FlowFile information can start to take up so much of the JVM that system performance suffers. To counteract this effect, NiFi "swaps" the FlowFile information to disk temporarily until more JVM space becomes available again. These properties govern how that process occurs.


Property	Description
nifi.swap.manager.implementation	The Swap Manager implementation. The default value is `org.apache.nifi.controller.FileSystemSwapManager` and should not be changed.
nifi.queue.swap.threshold	The queue threshold at which NiFi starts to swap FlowFile information to disk. The default value is `20000`.
nifi.swap.in.period	The swap in period. The default value is `5 sec`.
nifi.swap.in.threads	The number of threads to use for swapping in. The default value is `1`.
nifi.swap.out.period	The swap out period. The default value is `5 sec`.
nifi.swap.out.threads	The number of threads to use for swapping out. The default value is `4`.