Liuxuxin created IOTDB-4251:
-------------------------------

             Summary: Persist ChunkMetadata in TsFileIOWriter ahead of time to 
save memory
                 Key: IOTDB-4251
                 URL: https://issues.apache.org/jira/browse/IOTDB-4251
             Project: Apache IoTDB
          Issue Type: Improvement
            Reporter: Liuxuxin
            Assignee: Liuxuxin
             Fix For: master branch, 0.13.2
         Attachments: image.png

In the scenario of massive active sequences, the ChunkMetadata in 
TsFileIOWriter occupies a large part of the memory, which may lead to OOM.



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