DOCSP-52698 Lower Remaining Resharding Threshold (#13640)

* DOCSP-52698 Lower Remaining Resharding Threshold

* *

* nit edits

* RG external feedback

Author: ajhuh-mdb

content/manual/upcoming/source/includes/reshard-collection-apply-and-catchup.rst

@@ -1,7 +1,9 @@
+.. versionchanged:: 8.2
+
 During the apply and catch-up phase:
 
 - Each recipient shard begins applying oplog entries that were written
   to the the corresponding donor shard after the recipient cloned the data. 
 - When the estimate for the time remaining to complete the resharding
-  operation is under **two seconds**, the donor shard blocks
+  operation is under **500 ms**, the donor shard blocks
   writes on the source collection.

content/manual/upcoming/source/release-notes/8.2-compatibility.txt

@@ -35,6 +35,13 @@ orphanCleanupDelaySecs Change
 Starting in MongoDB 8.2, the default value of :parameter:`orphanCleanupDelaySecs` 
 is ``3600`` (previously ``900``).
 
+Remaining Resharding Time Threshold Change 
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Starting in MongoDB 8.2 (also available in 8.1.2 and 8.0.13), resharding enters 
+the critical section when the estimated time to complete the remaining work is 
+**500 ms** or less.
+
 Removed Parameters 
 ~~~~~~~~~~~~~~~~~~