From 326b1090b75f9fab81b282db5becce35374cd084 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Oliv=C3=A9r=20Falvai?= <ofalvai@gmail.com>
Date: Tue, 29 Mar 2022 22:26:29 +0200
Subject: [PATCH] Add note about Prometheus retention policy

---
 docs/configuring-playbook-prometheus-grafana.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/configuring-playbook-prometheus-grafana.md b/docs/configuring-playbook-prometheus-grafana.md
index 892bffb2..f178def2 100644
--- a/docs/configuring-playbook-prometheus-grafana.md
+++ b/docs/configuring-playbook-prometheus-grafana.md
@@ -25,6 +25,8 @@ matrix_grafana_default_admin_password: "some_strong_password_chosen_by_you"
 
 By default, a [Grafana](https://grafana.com/) web user-interface will be available at `https://stats.<your-domain>`.
 
+The retention policy of Prometheus metrics is [15 days by default](https://prometheus.io/docs/prometheus/latest/storage/#operational-aspects). Older data gets deleted automatically.
+
 
 ## What does it do?