diff --git a/be/src/common/config.cpp b/be/src/common/config.cpp
index e1b4404350..0289fadb71 100644
--- a/be/src/common/config.cpp
+++ b/be/src/common/config.cpp
@@ -1039,7 +1039,7 @@ DEFINE_mBool(inverted_index_compaction_enable, "true");
 // Only for debug, do not use in production
 DEFINE_mBool(debug_inverted_index_compaction, "false");
 // index by RAM directory
-DEFINE_mBool(inverted_index_ram_dir_enable, "false");
+DEFINE_mBool(inverted_index_ram_dir_enable, "true");
 // use num_broadcast_buffer blocks as buffer to do broadcast
 DEFINE_Int32(num_broadcast_buffer, "32");