[jira] [Created] (FLINK-18554) Memory exceeds taskmanager.memory.process.size when enabling mmap_read for RocksDB

["Truong Duc Kien (Jira)" <ji...@apache.org>]

Truong Duc Kien created FLINK-18554:
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             Summary: Memory exceeds taskmanager.memory.process.size when enabling mmap_read for RocksDB
                 Key: FLINK-18554
                 URL: https://issues.apache.org/jira/browse/FLINK-18554
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Configuration
    Affects Versions: 1.11.0
            Reporter: Truong Duc Kien


We are testing Flink automatic memory management feature on Flink 1.11. However, YARN kept killing our containers due to the processes' physical memory exceeds the limit, although we have tuned the following configurations:
{code:java}
taskmanager.memory.process.size
taskmanager.memory.managed.fraction
{code}
We suspect that it's because we have enabled mmap_read for RocksDB, since turning this options off seems to fix the issue. Maybe Flink automatic memory management is unable to account for the addition memory required when using mmap_read ?

 



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