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Posted to notifications@iotdb.apache.org by "Jialin Qiao (Jira)" <ji...@apache.org> on 2021/05/12 00:59:00 UTC

[jira] [Created] (IOTDB-1373) Adjust the tsfile_size_threshold automatically

Jialin Qiao created IOTDB-1373:
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             Summary: Adjust the tsfile_size_threshold automatically
                 Key: IOTDB-1373
                 URL: https://issues.apache.org/jira/browse/IOTDB-1373
             Project: Apache IoTDB
          Issue Type: Improvement
            Reporter: Jialin Qiao


Currently, when we need to flush a memtable, we check if the size of target TsFile is larger than the tsfile_size_threshold. If the target TsFile is larger than this parameter, we close the TsFile after flushing.

 

If a TsFile is not close, all ChunkMetadata will cached in memory, so we set tsfile_size_threshold to 1 to restrict that only two memtables are in TsFile. This is a simple way to avoid OOM.

 

However, each file contains two memtable is not efficient.

We need to enlarge tsfile_size_threshold and avoid OOM.

 



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