Github user StephanEwen commented on a diff in the pull request: https://github.com/apache/flink/pull/3276#discussion_r100128721 --- Diff: docs/setup/config.md --- @@ -86,7 +86,7 @@ The default fraction for managed memory can be adjusted using the `taskmanager.m - `taskmanager.memory.segment-size`: The size of memory buffers used by the memory manager and the network stack in bytes (DEFAULT: 32768 (= 32 KiBytes)). -- `taskmanager.memory.preallocate`: Can be either of `true` or `false`. Specifies whether task managers should allocate all managed memory when starting up. (DEFAULT: false). When `taskmanager.memory.off-heap` is set to `true`, then it is advised that this configuration is also set to `true`. If this configuration is set to `false` cleaning up of the allocated offheap memory happens only when the configured JVM parameter MaxDirectMemorySize is reached by triggering a full GC. +- `taskmanager.memory.preallocate`: Can be either of `true` or `false`. Specifies whether task managers should allocate all managed memory when starting up. (DEFAULT: false). When `taskmanager.memory.off-heap` is set to `true`, then it is advised that this configuration is also set to `true`. If this configuration is set to `false` cleaning up of the allocated offheap memory happens only when the configured JVM parameter MaxDirectMemorySize is reached by triggering a full GC. **Note:** For streaming setups, we highly recommend to set this value to `false` as the core state backends currently do not use the managed memory. --- End diff -- That would probably be good
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