DOCSP-36128 updating lookup performance (#6139) (#6250)

* DOCSP-36128 updating lookup performance * DOCSP-36128 updating lookup performance
mongodb · Feb 6, 2024 · 0ff88e2 · 0ff88e2
1 parent 7f4532c
commit 0ff88e2
Showing 1 changed file with 3 additions and 7 deletions.
diff --git a/source/reference/operator/aggregation/lookup.txt b/source/reference/operator/aggregation/lookup.txt
@@ -554,13 +554,9 @@ different ``$lookup`` operations.
 
      - .. _uncorrelated-subqueries-performance:
 
-       - An index on the foreign collection cannot support uncorrelated
-         subqueries.
-
-       - To improve performance for uncorrelated subqueries, use generic
-         indexing strategies and query optimization techniques. For
-         example, add appropriate indexes to support aggregation stages
-         before ``$lookup``.
+       - ``$lookup`` operations that contain uncorrelated subqueries
+         perform better when the inner pipeline can reference an
+         index of the foreign collection.
 
        - MongoDB only needs to run the ``$lookup`` subquery once before
          caching the query because there is no relationship between the