DOCSP-34711 Restore wiredTigerMaxCacheOverflowSizeGB (#5472)

Author: ajhuh-mdb

source/reference/parameters.txt

@@ -5307,6 +5307,57 @@ Storage Parameters
 WiredTiger Parameters
 ~~~~~~~~~~~~~~~~~~~~~
 
+.. parameter:: wiredTigerMaxCacheOverflowSizeGB
+
+   .. note:: Deprecated in MongoDB 4.4
+
+
+      MongoDB deprecates the ``wiredTigerMaxCacheOverflowSizeGB``
+      parameter. The parameter has no effect starting in MongoDB 4.4.
+
+   |mongod-only|
+
+   *Default*: 0 (No specified maximum)
+
+   Specify the maximum size (in GB) for the "lookaside (or cache
+   overflow) table" file :file:`WiredTigerLAS.wt` for MongoDB
+   4.2.1-4.2.x. The file no longer exists starting in
+   version 4.4.
+
+   The parameter can accept the following values:
+
+   .. list-table::
+      :header-rows: 1
+      :widths: 20 80
+
+      * - Value
+        - Description
+
+      * - ``0``
+
+        - The default value. If set to ``0``, the file size is
+          unbounded.
+
+      * - number >= 0.1
+
+        - The maximum size (in GB). If the :file:`WiredTigerLAS.wt`
+          file exceeds this size, :binary:`~bin.mongod` exits with a
+          fatal assertion. You can clear the :file:`WiredTigerLAS.wt`
+          file and restart :binary:`~bin.mongod`.
+
+   You can only set this parameter during run time using the
+   :dbcommand:`setParameter` database command:
+
+   .. code-block:: javascript
+
+      db.adminCommand( { setParameter: 1, wiredTigerMaxCacheOverflowSizeGB: 100 } )
+
+   To set the maximum size during start up, use the
+   :setting:`storage.wiredTiger.engineConfig.maxCacheOverflowFileSizeGB`
+   instead.
+
+   .. versionadded:: 4.2.1
+
 .. parameter:: wiredTigerEngineRuntimeConfig
 
    |mongod-only|