[jira] [Created] (FLINK-3206) Heap size for non-pre-allocated off-heap memory

["Greg Hogan (JIRA)" <ji...@apache.org>]

Greg Hogan created FLINK-3206:
---------------------------------

             Summary: Heap size for non-pre-allocated off-heap memory
                 Key: FLINK-3206
                 URL: https://issues.apache.org/jira/browse/FLINK-3206
             Project: Flink
          Issue Type: Bug
          Components: Start-Stop Scripts
    Affects Versions: 1.0.0
            Reporter: Greg Hogan


In {{taskmanager.sh}} the heap size is adjusted for off-heap memory only with pre-allocation set to true. In {{TaskManager.scala}} the computation is reversed to compute the {{directMemorySize}}. The effect is the JVM heap settings are too high and the assumed size of direct memory is also too high.

{noformat}
taskmanager.memory.fraction: 0.9
taskmanager.memory.off-heap: true
taskmanager.heap.mb: 18000
{noformat}

With {{taskmanager.memory.preallocate: false}}
{noformat}
13:44:29,015 INFO  org.apache.flink.runtime.taskmanager.TaskManager              -     -Xms18000M
13:44:29,015 INFO  org.apache.flink.runtime.taskmanager.TaskManager              -     -Xmx18000M
13:44:30,591 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Limiting managed memory to 0.9 of the maximum memory size (161999 MB), memory will be allocated lazily.
{noformat}

With {{taskmanager.memory.preallocate: true}}
{noformat}
13:53:44,127 INFO  org.apache.flink.runtime.taskmanager.TaskManager              -     -Xms1800M
13:53:44,127 INFO  org.apache.flink.runtime.taskmanager.TaskManager              -     -Xmx1800M
13:53:45,743 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Using 0.9 of the maximum memory size for managed off-heap memory (15524 MB).
{noformat}



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