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From kumarvishal09 <>
Subject [GitHub] incubator-carbondata pull request #435: [WIP]Added support for offheap stora...
Date Wed, 14 Dec 2016 08:08:28 GMT
GitHub user kumarvishal09 opened a pull request:

    [WIP]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 QueryExecutionOffheapCode

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 #435
commit 361cf75f3c396400d987b28947ea9ad7138c699d
Author: kumarvishal <>
Date:   2016-12-14T03:33:41Z

    Added support for offheap storage in query


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