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https://issues.apache.org/jira/browse/CARBONDATA-3113?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Manish Gupta resolved CARBONDATA-3113.
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Resolution: Fixed
Fix Version/s: 1.5.1
> Fixed Local Dictionary Query Performance and Added reusable buffer for
> direct flow
> -----------------------------------------------------------------------------------
>
> Key: CARBONDATA-3113
> URL: https://issues.apache.org/jira/browse/CARBONDATA-3113
> Project: CarbonData
> Issue Type: Improvement
> Reporter: kumar vishal
> Assignee: kumar vishal
> Priority: Major
> Fix For: 1.5.1
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> 1. Added reusable buffer for direct flow
> In query for each page each column it is creating a byte array, when number
> of columns are high it is causing lots of minor gc and degrading query
> performance, as each page is getting uncompressed one by one we can use same
> buffer for all the columns and based on requested size it will resize.
> 2. Fixed Local Dictionary performance issue.
> Reverted back #2895 and fixed NPE issue by setting null for local dictionary
> to vector In safe and Unsafe VariableLengthDataChunkStore
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