JingsongLi opened a new pull request #10396: [FLINK-14063][table-planner-blink] 
Operators use fractions to decide how many managed memory to allocate
URL: https://github.com/apache/flink/pull/10396
 
 
   
   ## What is the purpose of the change
   
   Operators allocate memory segments with the amount returned by 
MemoryManager#computeNumberOfPages.
   In this way, Operators can get more memory than expected, which will improve 
memory utilization.
   
   ## Brief change log
   
   - Modify HashTable and LongHashTable
   - Modify Agg BytesHashMap
   - Modify SortOperator
   - Modify SortMergeJoinOperator
   - Modify NestedLoopJoin
   - Modify over window agg
   
   ## Verifying this change
   
   This change is already covered by existing tests.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): no
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: no
     - The serializers: no
     - The runtime per-record code paths (performance sensitive): no
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: no
     - The S3 file system connector: no
   
   ## Documentation
   
     - Does this pull request introduce a new feature? no

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