[
https://issues.apache.org/jira/browse/IMPALA-7731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Lars Volker resolved IMPALA-7731.
---------------------------------
Resolution: Fixed
> Add ratio between scanned and transmitted bytes to fragment instances
> ---------------------------------------------------------------------
>
> Key: IMPALA-7731
> URL: https://issues.apache.org/jira/browse/IMPALA-7731
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 3.1.0
> Reporter: Lars Volker
> Assignee: Lars Volker
> Priority: Major
> Labels: observability, supportability
> Attachments: Selective Scan Slowdowns.png
>
>
> Selective scans (and by extension selective fragment instances) take higher
> performance hits when reading data remotely. They can be identified by a low
> ratio between data being transmitted vs data being read from HDFS. To make it
> easier to spot those instances we should add this ratio to each instance and
> to the root of the execution profile.
> !Selective Scan Slowdowns.png!
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org
For additional commands, e-mail: issues-all-h...@impala.apache.org
