[jira] [Created] (FLINK-2247) Improve the way memory is reported in the web frontend

["Theodore Vasiloudis (JIRA)" <ji...@apache.org>]

Theodore Vasiloudis created FLINK-2247:
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             Summary: Improve the way memory is reported in the web frontend
                 Key: FLINK-2247
                 URL: https://issues.apache.org/jira/browse/FLINK-2247
             Project: Flink
          Issue Type: Improvement
          Components: Webfrontend
            Reporter: Theodore Vasiloudis
            Priority: Trivial


Currently in the taskmanager view of the web frontend, the memory available to Flink is reported in a slightly confusing manner.

In the worker summary, we get a report of the Flink Managed memory available, and we get warnings when that is set too low.

The warnings though seem to be not taking the memory available to Flink when being issued.

For example, in a machine with 7.5GB memory available it is normal to assign ~6GB for the JVM, which under default settings gives ~4GB to Flink managed memory.

In this case however, we get a warning that 7500MB of memory is available, but only ~$4000MB is available to Flink, disregarding the total amount available to the JVM.

The reporting can then be improved by reporting the total amount available for the JVM, the amount available for Flink's managed memory, and only issue warnings when the settings are actually low compared to the available memory.



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