diff --git a/be/src/common/config.cpp b/be/src/common/config.cpp
index dc4bd7d57a86099..1e74f7a00cf037b 100644
--- a/be/src/common/config.cpp
+++ b/be/src/common/config.cpp
@@ -1100,8 +1100,8 @@ DEFINE_mInt32(schema_cache_sweep_time_sec, "100");
 // max number of segment cache, default -1 for backward compatibility fd_number*2/5
 DEFINE_Int32(segment_cache_capacity, "-1");
 DEFINE_Int32(segment_cache_fd_percentage, "40");
-DEFINE_mInt32(estimated_mem_per_column_reader, "1024");
-DEFINE_Int32(segment_cache_memory_percentage, "2");
+DEFINE_mInt32(estimated_mem_per_column_reader, "512");
+DEFINE_Int32(segment_cache_memory_percentage, "5");
 
 // enable feature binlog, default false
 DEFINE_Bool(enable_feature_binlog, "false");