Github user chenliang613 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2265#discussion_r196768157
--- Diff: integration/presto/README.md ---
@@ -113,6 +116,10 @@ Please follow the below steps to query carbondata in
presto
enable.unsafe.in.query.processing property by default is true in
CarbonData system, the carbon.unsafe.working.memory.in.mb
property defines the limit for Unsafe Memory usage in Mega Bytes, the
default value is 512 MB.
If your tables are big you can increase the unsafe memory, or disable
unsafe via setting enable.unsafe.in.query.processing=false.
+
+ If you do not want to use unsafe memory at all please set the below
properties to false as well.
--- End diff --
currently , carbon-presto integration doesn't support unsafe, so here the
description should be : please disable unsafe feature for presto integration
module.
---
