Merge pull request #9353 from amsliu/v-liuamson-CI6621

New article for CI 6621.

Author: Amson Liu

support/azure/azure-monitor/log-analytics/configure-and-manage-log-analytics-tables/understand-and-mitigate-high-data-consumption-log-analytics.md

@@ -0,0 +1,45 @@
+---
+title: Understand and Mitigate High Data Consumption in Log Analytics
+description: Provides instructions to resolve high data usage in Log Analytics.
+ms.date: 07/24/2025
+ms.reviewer: v-liuamson; v-gsitser
+ms.service: azure-monitor
+ms.custom: Configure and Manage Log analytics tables
+---
+
+# Understand and mitigate high data consumption in Log Analytics
+
+This article discusses high data consumption that occurs in Log Analytics workspaces, and focuses on tables such as `AzureDiagnostics`. This article also provides insights into the costs that are associated with data usage, and offers steps to optimize and reduce these costs.
+
+## Common issues and solutions
+
+- **Data retention**: Make sure that data retention settings are configured appropriately to avoid unnecessary storage costs.
+- **Data filtering**: Implement data filtering to collect only necessary data and reduce the volume of data ingested.
+
+### Instructions to resolve high data usage
+
+1. Identify high data tables:
+
+   1. Use the `AzureDiagnostics` table to determine which listed references are sending large amounts of data.
+   1. To identify the reference that's contributing to high data usage, run the following query in your Log Analytics workspace:
+
+        ```plaintext
+        AzureDiagnostics | distinct _ResourceId
+        ```
+
+2. Review the diagnostic settings:
+
+   1. Navigate to the diagnostic settings of the identified reference.
+   1. Remove unnecessary diagnostic settings if the data isn't required. This step stops the data from being sent to the AzureDiagnostics table.
+
+3. Review the articles in the ["References" section](#references) to understand the costs that are associated with your Log Analytics workspace.
+
+4. To optimize data usage and reduce costs, follow the best practices that are outlined in the "References" section.
+
+## References
+
+- [Understand Azure Monitor pricing](https://azure.microsoft.com/pricing/details/monitor/)
+- [Best Practices for Cost Management](/azure/azure-monitor/fundamentals/best-practices-cost)
+- [Cost Management for Logs](/azure/azure-monitor/logs/cost-logs)
+
+If the issue persists after you follow the solution steps, open a support case for further assistance.

support/azure/azure-monitor/toc.yml

@@ -115,6 +115,8 @@ items:
   items:
   - name: Configure and Manage Log analytics tables
     items:
+    - name: Understand and mitigate high data consumption in Log Analytics
+      href: log-analytics/configure-and-manage-log-analytics-tables/understand-and-mitigate-high-data-consumption-log-analytics.md
     - name: Troubleshoot custom table creation errors in Azure
       href: log-analytics/configure-and-manage-log-analytics-tables/troubleshoot-custom-table-creation-errors.md
     - name: Troubleshoot custom log table creation in Azure