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Posted to issues@flink.apache.org by "Matthias (Jira)" <ji...@apache.org> on 2020/10/30 14:42:00 UTC

[jira] [Created] (FLINK-19904) Update documentation to address difference between -Xmx and the metric for maximum heap

Matthias created FLINK-19904:
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             Summary: Update documentation to address difference between -Xmx and the metric for maximum heap
                 Key: FLINK-19904
                 URL: https://issues.apache.org/jira/browse/FLINK-19904
             Project: Flink
          Issue Type: Improvement
          Components: Documentation, Runtime / Metrics
    Affects Versions: 1.11.2, 1.10.2
            Reporter: Matthias
             Fix For: 1.12.0


We observed a difference between the configured maximum heap and the maximum heap returned by the metric system. This is caused by the used garbage collection (see [this blogpost|https://plumbr.io/blog/memory-leaks/less-memory-than-xmx] for further details.

We should make the user aware of this in the documentation mentioning it in the memory configuration and the metrics page.



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