diff --git a/docker/.env.example b/docker/.env.example
index b2d6244b462..8f843d1699b 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -1009,6 +1009,10 @@ SENDGRID_API_KEY=
 # Maximum length of segmentation tokens for indexing
 INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH=4000
 
+# Maximum number of worker threads used for high-quality dataset indexing.
+# Lower this value to reduce memory usage and avoid OOM/freezes during re-indexing.
+INDEXING_MAX_WORKERS=2
+
 # Member invitation link valid time (hours),
 # Default: 72.
 INVITE_EXPIRY_HOURS=72