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https://issues.apache.org/jira/browse/KUDU-815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15273285#comment-15273285
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Todd Lipcon commented on KUDU-815:
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Looking at some stress tests via Impala on a cluster, and want to pick up this
and a couple related optimizations.
> Improve performance of first scan following TS restart
> ------------------------------------------------------
>
> Key: KUDU-815
> URL: https://issues.apache.org/jira/browse/KUDU-815
> Project: Kudu
> Issue Type: Bug
> Components: perf, tablet
> Affects Versions: Private Beta
> Reporter: Adar Dembo
> Assignee: Todd Lipcon
> Priority: Minor
>
> Because cfiles are opened lazily, the very first scan following a TS restart
> cannot cull the set of scanned delta files based on minimum/maximum timestamp
> (the min/max are found in the file's delta stats, which aren't loaded until
> the file is opened). This makes the first scan quite slow.
> We should find some way to work around this to improve the scan's performance.
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