(DOCSP-43520) Include the steps to disable THP on a process level for versions <8.0

Author: carriecwk

source/reference/mongodb-agent-settings.txt

@@ -553,6 +553,21 @@ Externally Sourced Configuration Settings
 Transparent Huge Page (THP) Settings
 ------------------------------------
 
+{+mdbagent+} allows you to disable Transparent Huge Pages (THP) on a 
+per-process basis to avoid accidental performance degradation. To disable THP, 
+perform the following steps:
+
+1. Upgrade the {+mdbagent+} version.
+#. Modify the automation config file to include ``enableAgentManagingTHPSettings=true``.
+#. Restart the {+mdbagent+} and the managed |mongos| processes. You can now enable THP 
+   on a system-wide level. 
+
+   .. note::
+      
+      This will generate false positive start-up errors.
+
+#. (Optional) Upgrade to 8.0. 
+
 .. setting:: enableAgentManagingTHPSettings
 
    *Type*: boolean