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Till Rohrmann updated FLINK-9142: --------------------------------- Fix Version/s: (was: 1.6.1) > Lower the minimum number of buffers for incoming channels to 1 > -------------------------------------------------------------- > > Key: FLINK-9142 > URL: https://issues.apache.org/jira/browse/FLINK-9142 > Project: Flink > Issue Type: Sub-task > Components: Network > Affects Versions: 1.5.0, 1.6.0 > Reporter: Nico Kruber > Priority: Major > Fix For: 1.7.0, 1.6.2 > > > Even if we make the floating buffers optional, we still require > {{taskmanager.network.memory.buffers-per-channel}} number of (exclusive) > buffers per incoming channel with credit-based flow control while without, > the minimum was 1 and only the maximum number of buffers was influenced by > this parameter. > {{taskmanager.network.memory.buffers-per-channel}} is set to {{2}} by default > with the argumentation that this way we will have one buffer available for > netty to process while a worker thread is processing/deserializing the other > buffer. While this seems reasonable, it does increase our minimum > requirements. Instead, we could probably live with {{1}} exclusive buffer and > up to {{gate.getNumberOfInputChannels() * (networkBuffersPerChannel - 1) + > extraNetworkBuffersPerGate}} floating buffers. That way we will have the same > memory footprint as before with only slightly changed behaviour. -- This message was sent by Atlassian JIRA (v7.6.3#76005)