Merge pull request #247691 from varun-dhawan/varund-july

[PostgreSQL] updates the note for metric visualization limitation

Author: prmerger-automator[bot]

articles/postgresql/flexible-server/concepts-monitoring.md

@@ -6,7 +6,7 @@ ms.author: varundhawan
 ms.service: postgresql
 ms.subservice: flexible-server
 ms.topic: conceptual
-ms.date: 11/30/2021
+ms.date: 8/8/2023
 ---
 
 # Monitor metrics on Azure Database for PostgreSQL - Flexible Server
@@ -19,6 +19,9 @@ Monitoring data about your servers helps you troubleshoot and optimize for your
 
 Azure Database for PostgreSQL provides various metrics that give insight into the behavior of the resources that support the Azure Database for PostgreSQL server. Each metric is emitted at a 1-minute interval and has up to [93 days of history](../../azure-monitor/essentials/data-platform-metrics.md#retention-of-metrics). You can configure alerts on the metrics. Other options include setting up automated actions, performing advanced analytics, and archiving the history. For more information, see the [Azure Metrics overview](../../azure-monitor/essentials/data-platform-metrics.md).
 
+> [!NOTE]
+> While metrics are stored for 93 days, you can only query (in the Metrics tile) for a maximum of 30 days' worth of data on any single chart. If you see a blank chart or your chart displays only part of metric data, verify that the difference between start and end dates in the time picker doesn't exceed the 30-day interval. After you've selected a 30-day interval, you can pan the chart to view the full retention window. 
+
 ### List of metrics
 
 The following metrics are available for a flexible server instance of Azure Database for PostgreSQL: