From f0f5fbb9ce47ad4f8be9caa31e56fb5e4adbe79c Mon Sep 17 00:00:00 2001
From: Michael Friedrich <michael.friedrich@icinga.com>
Date: Mon, 5 Aug 2019 13:06:50 +0200
Subject: [PATCH] DB IDO: Add upgrading note

---
 doc/16-upgrading-icinga-2.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/16-upgrading-icinga-2.md b/doc/16-upgrading-icinga-2.md
index 08e66aed4..6eaec877d 100644
--- a/doc/16-upgrading-icinga-2.md
+++ b/doc/16-upgrading-icinga-2.md
@@ -289,6 +289,12 @@ It will also attempt to fix them, the following log entry is perfectly fine.
 
 If you still encounter problems, please follow [this troubleshooting entry](15-troubleshooting.md#troubleshooting-api-missing-runtime-objects).
 
+### DB IDO MySQL Schema <a id="upgrading-to-2-11-db-ido"></a>
+
+The schema for MySQL contains an optional update which
+drops unneeded indexes. You don't necessarily need to apply
+this update.
+
 ### Documentation <a id="upgrading-to-2-11-documentation"></a>
 
 * `Custom attributes` have been renamed to `Custom variables` following the name `vars` and their usage in backends and web interfaces.