infoverload commented on a change in pull request #278:
URL: https://github.com/apache/flink-web/pull/278#discussion_r742818373
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File path: gettinghelp.md
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@@ -131,3 +131,12 @@ Hadoop version of the cluster you want to connect to (HDFS
/ YARN).
The easiest way to fix that is to pick a Hadoop-free Flink version and simply
export the Hadoop path and
classpath from the cluster.
+
+### I have an OutOfMemoryError
+
+In Fink 1.9.0 and prior version, the managed memory fraction of taskmanager is
controlled by `taskmanager.memory.fraction`,
+and with 0.7 as the default value. This sometimes will cause OOMs due to the
fact that the default value of
+JVM parameter `NewRatio` is 2, which means the old generation occupied only
2/3 (0.66) of the heap memory.
Review comment:
```suggestion
In Flink 1.9.0 and prior versions, the managed memory fraction of the
taskmanager is controlled by `taskmanager.memory.fraction`,
with 0.7 as the default value. This will sometimes cause OOMs because the
default value of the
JVM parameter `NewRatio` is 2, which means that the old generation occupied
only 2/3 (0.66) of the heap memory.
```
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