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https://issues.apache.org/jira/browse/KYLIN-1068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shaofeng SHI resolved KYLIN-1068.
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Resolution: Fixed
The enhancement has been done and merged back to 2.x-staging branch.
> Optimize the memory footprint for TopN counter
> ----------------------------------------------
>
> Key: KYLIN-1068
> URL: https://issues.apache.org/jira/browse/KYLIN-1068
> Project: Kylin
> Issue Type: Improvement
> Components: Job Engine
> Affects Versions: v2.0
> Reporter: Shaofeng SHI
> Assignee: Shaofeng SHI
> Fix For: v2.0
>
>
> The TopN implementation in StreamSummary is not perfect for Kylin, as Kylin
> use a Double typed counter; In a big data scenario, the possibility of
> multiple key having the same double counter is very low, so the data
> structure may not be memory economic;
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