Github user jackylk commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1014#discussion_r122570744
--- Diff: docs/configuration-parameters.md ---
@@ -58,7 +58,7 @@ This section provides the details of all the
configurations required for CarbonD
| carbon.merge.sort.prefetch | true | Enable prefetch of data during merge
sort while reading data from sort temp files in data loading. | |
| carbon.update.persist.enable | true | Enabling this parameter considers
persistent data. Enabling this will reduce the execution time of UPDATE
operation. | |
| carbon.load.global.sort.partitions | 0 | The Number of partitions to use
when shuffling data for sort. If user don't configurate or configurate it less
than 1, it uses the number of map tasks as reduce tasks. In general, we
recommend 2-3 tasks per CPU core in your cluster.
-
+| carbon.enable.vector.reader | true | This parameter increases the query
performance. | |
--- End diff --
I think it is better to give more information about this option, perhaps
you can describe why it can increase performance and give hint when to enable
this feature
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