GitHub user kumarvishal09 opened a pull request:
https://github.com/apache/incubator-carbondata/pull/450
[CARBONDATA-545]Added support for offheap storage in query
**Problem**
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.
**Solution**
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 https://github.com/kumarvishal09/incubator-carbondata
QueryOffHeapStorage
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-carbondata/pull/450.patch
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
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commit 941d1a32e846b9b4a34667b11cc1468885f0f79a
Author: kumarvishal <[email protected]>
Date: 2016-12-14T03:33:41Z
Added support for offheap storage in query
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