Greg Hogan created FLINK-3206:
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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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