Github user yanghua commented on the issue: https://github.com/apache/flink/pull/5448 hi @dawidwys thanks for your review suggestion, I have refactored the PR code except the `MANAGED_MEMORY_SIZE `. The problem you concerned is exists, the key is suitable for this PR, and it seems we should introduce a new key and mark this as **@deprecated**, otherwise, We could not avoid user using old config value without unit. But it is just a possibility, we can highlight a **Note** message and give a guidance. At worst, user config it as **megabytes**, actually it means **bytes"" (`1024 * 1024` difference) , when starting TaskManager, it would cause failed or show disagreement with Flink web UI. Then use would recheck this configuration item. What's your opinion? @StephanEwen
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