Myasuka commented on a change in pull request #10921: [FLINK-15692][state 
backend] Enable limiting RocksDB memory consumption by default
URL: https://github.com/apache/flink/pull/10921#discussion_r369644740
 
 

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 File path: 
flink-runtime/src/test/java/org/apache/flink/runtime/state/StateBackendMigrationTestBase.java
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 @@ -71,12 +74,26 @@
 
        protected abstract B getStateBackend() throws Exception;
 
+       protected abstract long getManagedMemorySize();
 
 Review comment:
   The original `MockEnvironmentBuilder` would already have a default 
`memorySize` as `1024 * 32 * 1024`. The reason I introduced a 
`getManagedMemorySize` method here is to let non-RocksDB test could not reserve 
any off-heap memory.
   If you agree, I think we could use original `MockEnvironmentBuilder` 
directly but also reserve off-heap memory for non-RocksDB tests.

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