[jira] [Assigned] (IOTDB-1667) Speed up the deletion of storage groups

["Haonan Hou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IOTDB-1667?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Haonan Hou reassigned IOTDB-1667:
---------------------------------

    Assignee:     (was: Liuxuxin)

> Speed up the deletion of storage groups
> ---------------------------------------
>
>                 Key: IOTDB-1667
>                 URL: https://issues.apache.org/jira/browse/IOTDB-1667
>             Project: Apache IoTDB
>          Issue Type: Improvement
>          Components: Core/Engine
>            Reporter: Xinyu Tan
>            Priority: Major
>         Attachments: image-2021-09-10-10-55-59-921.png, image-2021-09-10-10-56-05-205.png, image-2021-09-10-10-56-09-642.png, image-2021-09-10-10-56-13-652.png
>
>
> Currently, deleting a storage group requires waiting for all corresponding memtables to flush to disks. This may take a lot of time. Experiments show that deleting all storage groups takes more than two minutes when the memory usage is 150GB. In fact, we might be able to drop the corresponding memtable in memory and let the JVM GC it.
> !image-2021-09-10-10-55-59-921.png|width=529,height=274!
> !image-2021-09-10-10-56-05-205.png|width=528,height=275!
> !image-2021-09-10-10-56-09-642.png|width=523,height=254!
> !image-2021-09-10-10-56-13-652.png|width=518,height=264!



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