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Posted to notifications@iotdb.apache.org by "Jialin Qiao (Jira)" <ji...@apache.org> on 2021/11/25 06:37:00 UTC

[jira] [Created] (IOTDB-2057) OutOfMemoryError: Direct buffer memory

Jialin Qiao created IOTDB-2057:
----------------------------------

             Summary: OutOfMemoryError: Direct buffer memory 
                 Key: IOTDB-2057
                 URL: https://issues.apache.org/jira/browse/IOTDB-2057
             Project: Apache IoTDB
          Issue Type: Bug
    Affects Versions: 0.12.3
            Reporter: Jialin Qiao
         Attachments: image-2021-11-25-14-31-56-959.png, image-2021-11-25-14-33-39-006.png, image-2021-11-25-14-35-13-448.png

In an IoTDB instance, we set:

MAX_HEAP_SIZE="50G"

HEAP_NEWSIZE="50G"

MAX_DIRECT_MEMORY_SIZE="50G"

There are read/write and compaction in this IoTDB.

However, the direct memory exceeds 50G and OutOfMemory.

!image-2021-11-25-14-31-56-959.png!

!image-2021-11-25-14-33-39-006.png!

The heap memory looks good.

!image-2021-11-25-14-35-13-448.png!

We need to control the direct memory. E.g., when using FileChannel to read TsFile.



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