Github user jackylk commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/324#discussion_r88768124
--- Diff: conf/carbon.properties.template ---
@@ -52,7 +52,7 @@ carbon.compaction.level.threshold=4,3
#default size (in MB) for major compaction to be triggered
carbon.major.compaction.size=1024
######## Query Configuration ########
-#Number of cores to be used while querying
+#Number of cores to be used for loading blocks when execute query
--- End diff --
It is not just for query, compaction also need this parameter.
I think a better description is "Number of cores to be used for loading index into memory"
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