diff --git a/be/src/common/config.h b/be/src/common/config.h
index cccb49ed002be..0b76d3bcb8118 100644
--- a/be/src/common/config.h
+++ b/be/src/common/config.h
@@ -704,6 +704,10 @@ CONF_Int32(metric_late_materialization_ratio, "1000");
 // Max batched bytes for each transmit request. (256KB)
 CONF_Int64(max_transmit_batched_bytes, "262144");
 // max chunk size for each tablet write request. (512MB)
+// see: https://github.com/StarRocks/starrocks/pull/50302
+// NOTE: If there are a large number of columns when loading,
+// a too small max_tablet_write_chunk_bytes may cause more frequent RPCs, which may affect performance.
+// In this case, we can try to increase the value to avoid the problem.
 CONF_mInt64(max_tablet_write_chunk_bytes, "536870912");
 
 CONF_Int16(bitmap_max_filter_items, "30");