diff --git a/installer/conf/td-agent-bit.conf b/installer/conf/td-agent-bit.conf
index e7aabd242..ab79710c7 100644
--- a/installer/conf/td-agent-bit.conf
+++ b/installer/conf/td-agent-bit.conf
@@ -12,8 +12,6 @@
     DB.Sync Off
     Parser docker
     Mem_Buf_Limit 10m
-    Buffer_Chunk_Size 1m
-    Buffer_Max_Size 1m
     Rotate_Wait 20
     Refresh_Interval 30
     Path_Key filepath