diff --git a/src/metabase/driver/sql_jdbc/sync/describe_table.clj b/src/metabase/driver/sql_jdbc/sync/describe_table.clj
index 6ddf03d8521ef19129a300e0cd16c10e1e6170d0..2b7aac6b4d4fbb12971b93fe041096c40b56939e 100644
--- a/src/metabase/driver/sql_jdbc/sync/describe_table.clj
+++ b/src/metabase/driver/sql_jdbc/sync/describe_table.clj
@@ -206,7 +206,7 @@
 
 (def ^:const nested-field-sample-limit
   "Number of rows to sample for describe-nested-field-columns"
-  10000)
+  500)
 
 (defn- flattened-row [field-name row]
   (letfn [(flatten-row [row path]