diff --git a/source/reference/write-concern.txt b/source/reference/write-concern.txt index 88d78a6c557..b36cb421b11 100644 --- a/source/reference/write-concern.txt +++ b/source/reference/write-concern.txt @@ -158,6 +158,12 @@ the write operation has been written to the :doc:`journal configuration setting determines the behavior. See :ref:`wc-ack-behavior` for details. + - The :doc:`WiredTiger ` and :doc:`MMAPv1 ` + storage engines handle setting a write concern that includes ``j: true`` + differently. ``WiredTiger`` forces an immediate, synchronous journal + flush while ``MMAPv1`` waits for the next scheduled journal flush. See + :doc:`journaling ` for details. + .. _wc-wtimeout: ``wtimeout``