From 2ba9c871fd1ab2e462e3b2910c7090f27669e69e Mon Sep 17 00:00:00 2001
From: Andrew Feierabend <andrew.feierabend@mongodb.com>
Date: Mon, 1 Feb 2021 14:38:20 -0500
Subject: [PATCH] DOCS-13741 add warning to ttlMonitorEnabled param

---
 source/reference/parameters.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/source/reference/parameters.txt b/source/reference/parameters.txt
index 72fd2c4a657..6358a3ed084 100644
--- a/source/reference/parameters.txt
+++ b/source/reference/parameters.txt
@@ -1059,6 +1059,8 @@ General Parameters
 
    |mongod-only|
 
+   *Default*: ``true``
+
    To support :doc:`TTL Indexes </core/index-ttl>`, :binary:`~bin.mongod`
    instances have a background thread that is responsible for deleting
    documents from collections with TTL indexes.
@@ -1078,6 +1080,14 @@ General Parameters
 
       mongod --setParameter ttlMonitorEnabled=false
 
+   .. important::
+
+      Do not run production :binary:`~bin.mongod` instances with
+      ``ttlMonitorEnabled`` disabled, except under guidance from MongoDB
+      support. Preventing TTL document removal can negatively impact
+      MongoDB internal system operations that depend on
+      :doc:`TTL Indexes </core/index-ttl>`.
+
 .. parameter:: tcpFastOpenServer
 
    .. versionadded:: 4.4