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-rw-r--r--doc/user/group/subgroups/index.md4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/user/group/subgroups/index.md b/doc/user/group/subgroups/index.md
index 1f4aafe27c2..a04129131c3 100644
--- a/doc/user/group/subgroups/index.md
+++ b/doc/user/group/subgroups/index.md
@@ -2,7 +2,8 @@
>**Notes:**
- [Introduced][ce-2772] in GitLab 9.0.
-- MySQL support for subgroups was dropped in GitLab 9.3.
+- MySQL support for subgroups was dropped in GitLab 9.3
+ [due to performance reasons][issue].
With subgroups (aka nested groups or hierarchical groups) you can have
up to 20 levels of nested groups, which among other things can help you to:
@@ -175,3 +176,4 @@ Here's a list of what you can't do with subgroups:
[ce-2772]: https://gitlab.com/gitlab-org/gitlab-ce/issues/2772
[permissions]: ../../permissions.md#group
[reserved]: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/lib/gitlab/path_regex.rb
+[issue]: https://gitlab.com/gitlab-org/gitlab-ce/issues/30472#note_27747600