DOCS-14887 wired tiger transaction limit (#6087) (#6091)

Co-authored-by: jason-price-mongodb <[email protected]>

Co-authored-by: jason-price-mongodb <[email protected]>

Author: jason-price-mongodb

source/core/transactions-production-consideration.txt

@@ -53,6 +53,13 @@ The :parameter:`transactionLifetimeLimitSeconds` also ensures that
 expired transactions are aborted periodically to relieve storage cache
 pressure.
 
+.. note::
+
+   If you have an uncommitted transaction that exceeds 5% of the
+   :setting:`WiredTiger cache size
+   <storage.wiredTiger.engineConfig.cacheSizeGB>`, the transaction will
+   abort and return a :term:`write conflict` error.
+
 .. _txns-locks:
 
 Transactions and Locks