[GitHub] [flink] azagrebin opened a new pull request #9693: Flink 13984

[GitBox <gi...@apache.org>]

azagrebin opened a new pull request #9693: Flink 13984
URL: https://github.com/apache/flink/pull/9693
 
 
   ## What is the purpose of the change
   
   This does some refactoring to prepare and then changes the MemoryManager to serve both types of memory at the same time: HEAP and OFF_HEAP. Additionally to paged segments, it adds API to reserve arbitrary sized chunks of memory.
   
   ## Brief change log
   
     - some cleanup in MemoryManager
     - add MemoryManagerBuilder for tests
     - deprecate memory preallocation in MemoryManager
     - implement KeyedBudget to atomically track available memory per type up to the limit.
     - change MemoryManager to use KeyedBudget instead of internal locking
     - switch to concurrent hash maps for owner tracking in MemoryManager
     - add another type of memory to MemoryManager
     - Implement reservation of memory chunks in MemoryManager
   
   ## Verifying this change
   
   Existing and newly added unit 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)
     - If yes, how is the feature documented? (not applicable)
   

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