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Posted to issues-all@impala.apache.org by "Joe McDonnell (Jira)" <ji...@apache.org> on 2023/06/02 22:42:00 UTC
[jira] [Resolved] (IMPALA-10971) Data cache metrics count error when LIRS is enabled
[ https://issues.apache.org/jira/browse/IMPALA-10971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joe McDonnell resolved IMPALA-10971.
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Fix Version/s: Impala 4.3.0
Target Version: Impala 4.3.0 (was: Impala 4.0.0)
Resolution: Fixed
> Data cache metrics count error when LIRS is enabled
> ---------------------------------------------------
>
> Key: IMPALA-10971
> URL: https://issues.apache.org/jira/browse/IMPALA-10971
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 4.0.0
> Reporter: Ye Zihao
> Assignee: Joe McDonnell
> Priority: Minor
> Fix For: Impala 4.3.0
>
> Attachments: image-2021-10-18-14-15-52-422.png
>
>
> When LIRS is enabled, impala-server.io-mgr.remote-data-cache-total-bytes may give a wrong value because of INSTANT EVICTIONS. When INSTANT EVICTIONS occur, the total bytes decreases due to EvictedEntry, and no corresponding increase due to failure of insert, so the total bytes becomes smaller and smaller, or even negative.
> !image-2021-10-18-14-15-52-422.png!
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