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Posted to issues-all@impala.apache.org by "Joe McDonnell (Jira)" <ji...@apache.org> on 2025/04/09 17:17:00 UTC

[jira] [Assigned] (IMPALA-13478) Don't sync tuple cache file contents to disk immediately

     [ https://issues.apache.org/jira/browse/IMPALA-13478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joe McDonnell reassigned IMPALA-13478:
--------------------------------------

    Assignee: Joe McDonnell

> Don't sync tuple cache file contents to disk immediately
> --------------------------------------------------------
>
>                 Key: IMPALA-13478
>                 URL: https://issues.apache.org/jira/browse/IMPALA-13478
>             Project: IMPALA
>          Issue Type: Task
>          Components: Backend
>    Affects Versions: Impala 4.5.0
>            Reporter: Joe McDonnell
>            Assignee: Joe McDonnell
>            Priority: Major
>
> Currently, the tuple cache file writer syncs the file contents to disk before closing the file. This slows down the write path considerably, especially if disks are slow. This should be moved off of the fast path and done asynchronously. As a first step, this can remove the sync call and close the file without syncing. Other readers are still able to access it, and the kernel will flush the buffers as needed.



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