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From kumarvishal09 <>
Subject [GitHub] incubator-carbondata pull request #450: [CARBONDATA-545]Added support for of...
Date Tue, 20 Dec 2016 06:41:49 GMT
GitHub user kumarvishal09 opened a pull request:

    [CARBONDATA-545]Added support for offheap storage in query

    There are lots of gc when carbon is processing more number of records during query, which
is impacting carbon query performance.To solve this gc problem happening when query output
is too huge or when more number of records are processed.
    Currently we are storing all the data which is read during query from carbon data file
in heap, when number of query output is huge it is causing more gc. Instead of storing in
heap we can store this data in offheap and will clear when scanning is finished for that query.

You can merge this pull request into a Git repository by running:

    $ git pull QueryOffHeapStorage

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #450
commit 941d1a32e846b9b4a34667b11cc1468885f0f79a
Author: kumarvishal <>
Date:   2016-12-14T03:33:41Z

    Added support for offheap storage in query


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