[FLINK-14123][docs] Update release notes to contain warning about OOM

This closes apache#9949.
deepfield · Oct 21, 2019 · b0f693d · b0f693d
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diff --git a/docs/release-notes/flink-1.8.md b/docs/release-notes/flink-1.8.md
@@ -203,4 +203,11 @@ see
 [here](/dev/stream/state/custom_serialization.html#implementing-a-compositetypeserializersnapshot)
 for instructions on using `CompositeTypeSerializerSnapshot`.
 
+### Memory management
+
+In Fink 1.8.0 and prior version, the managed memory fraction of taskmanager is controlled by `taskmanager.memory.fraction`,
+and with 0.7 as the default value. However, sometimes this 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. So if you run into
+this case, please manually change this value to a lower value.
+
 {% top %}
diff --git a/docs/release-notes/flink-1.8.zh.md b/docs/release-notes/flink-1.8.zh.md
@@ -203,4 +203,11 @@ see
 [here](/dev/stream/state/custom_serialization.html#implementing-a-compositetypeserializersnapshot)
 for instructions on using `CompositeTypeSerializerSnapshot`.
 
+### Memory management
+
+In Fink 1.8.0 and prior version, the managed memory fraction of taskmanager is controlled by `taskmanager.memory.fraction`,
+and with 0.7 as the default value. However, sometimes this 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. So if you run into
+this case, please manually change this value to a lower value.
+
 {% top %}
diff --git a/docs/release-notes/flink-1.9.md b/docs/release-notes/flink-1.9.md
@@ -75,6 +75,16 @@ have skipped Java 9 support.
 Related issues:
 - [FLINK-8033: JDK 9 support](https://issues.apache.org/jira/browse/FLINK-8033)
 
+### Memory management
+
+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. However, sometimes this 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. So if you run into
+this case, please manually change this value to a lower value.
+
+Related issues:
+- [FLINK-14123: Lower the default value of taskmanager.memory.fraction](https://issues.apache.org/jira/browse/FLINK-14123)
+
 ## Deprecations and breaking changes
 
 ### Scala expression DSL for Table API moved to `flink-table-api-scala`

diff --git a/docs/release-notes/flink-1.9.zh.md b/docs/release-notes/flink-1.9.zh.md
@@ -75,6 +75,16 @@ have skipped Java 9 support.
 Related issues:
 - [FLINK-8033: JDK 9 support](https://issues.apache.org/jira/browse/FLINK-8033)
 
+### Memory management
+
+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. However, sometimes this 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. So if you run into
+this case, please manually change this value to a lower value.
+
+Related issues:
+- [FLINK-14123: Lower the default value of taskmanager.memory.fraction](https://issues.apache.org/jira/browse/FLINK-14123)
+
 ## Deprecations and breaking changes
 
 ### Scala expression DSL for Table API moved to `flink-table-api-scala`