diff --git a/config/datanode.example.toml b/config/datanode.example.toml
index 2b4b7b4b1b9a..9cd6aebeb7b0 100644
--- a/config/datanode.example.toml
+++ b/config/datanode.example.toml
@@ -82,6 +82,11 @@ vector_cache_size = "512MB"
 page_cache_size = "512MB"
 # Buffer size for SST writing.
 sst_write_buffer_size = "8MB"
+# Parallelism to scan a region (default: 1/4 of cpu cores).
+# 0 or 1 means no parallelism.
+scan_parallelism = 0
+# Capacity of the channel to send data from parallel scan tasks to the main task (default 32).
+parallel_scan_channel_size = 32
 
 # Log options, see `standalone.example.toml`
 # [logging]
diff --git a/config/standalone.example.toml b/config/standalone.example.toml
index bb8f5c2d1cbb..37a3ab96f413 100644
--- a/config/standalone.example.toml
+++ b/config/standalone.example.toml
@@ -151,6 +151,11 @@ vector_cache_size = "512MB"
 page_cache_size = "512MB"
 # Buffer size for SST writing.
 sst_write_buffer_size = "8MB"
+# Parallelism to scan a region (default: 1/4 of cpu cores).
+# 0 or 1 means no parallelism.
+scan_parallelism = 0
+# Capacity of the channel to send data from parallel scan tasks to the main task (default 32).
+parallel_scan_channel_size = 32
 
 # Log options
 # [logging]