Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1433#issuecomment-162334879
As followup to this, I would suggest two changes:
1. Adjust the log message, to reflect that not 0.7 are either used
immediately (eager allocation) or that the managed memory is capped at 0.7 *
total memory. That makes it clear from reading the log that the memory is not
pre-allocated.
2. The web frontend should display for managed memory: (used / max). I have
talked to users who were confused, thinking despite starting the system in
streaming mode, it pre-allocated all the heap way,
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