1996fanrui commented on code in PR #20038: URL: https://github.com/apache/flink/pull/20038#discussion_r902756197
########## docs/content/docs/deployment/memory/network_mem_tuning.md: ########## @@ -120,6 +120,19 @@ In order to avoid excessive data skew, the number of buffers for each subpartiti Unlike the input buffer pool, the configured amount of exclusive buffers and floating buffers is only treated as recommended values. If there are not enough buffers available, Flink can make progress with only a single exclusive buffer per output subpartition and zero floating buffers. +#### Overdraft buffers + +For each output subtask can also request up to `taskmanager.network.memory.max-overdraft-buffers-per-gate` (by default 5) extra overdraft buffers. +Those buffers are only used, if despite presence of a backpressure, Flink can not stop producing more records to the output. Review Comment: LGTM -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
