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title: Understanding and Mitigating High Data Consumption in Log Analytics
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description: Provides step-by-step instructions on how to resolve high data usage in Log Analytics.
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description: Provides instructions to resolve high data usage in Log Analytics.
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ms.date: 07/23/2025
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ms.reviewer: v-liuamson; v-gsitser
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ms.service: azure-monitor
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ms.custom: Configure and Manage Log analytics tables
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---
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# Understanding and Mitigating High Data Consumption in Log Analytics
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# Understand and mitigate high data consumption in Log Analytics
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## Introduction
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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.
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This article addresses the issue of high data consumption in Log Analytics workspaces, specifically focusing on tables like `AzureDiagnostics`. It provides insights into understanding the costs associated with data usage and offers steps to optimize and reduce these costs.
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## Common issues and solutions
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## Common Issues and Solutions
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- **Data retention**: Make sure that data retention settings are configured appropriately to avoid unnecessary storage costs.
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- **Data filtering**: Implement data filtering to collect only necessary data and reduce the volume of data ingested.
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- **Data Retention**: Ensure that data retention settings are configured appropriately to avoid unnecessary storage costs.
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- **Data Filtering**: Implement data filtering to only collect necessary data, reducing the volume of data ingested.
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### Instructions to resolve high data usage
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### Step-by-Step Instructions to Resolve High Data Usage
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1. Identify high data tables:
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1. **Identify High Data Tables:**
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- Use the `AzureDiagnostics` table to determine which Reference are sending large amounts of data.
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- Run the following query in your Log Analytics workspace:
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1. Use the `AzureDiagnostics` table to determine which listed references are sending large amounts of data.
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1. To identify the reference that's contributing to high data usage, run the following query in your Log Analytics workspace:
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```plaintext
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AzureDiagnostics | distinct _ResourceId
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```
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2. Review the diagnostic settings:
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- This will help you identify the Reference contributing to high data usage.
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2. **Review Diagnostic Settings:**
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- Navigate to the diagnostic settings of the identified Reference.
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- Remove unnecessary diagnostic settings if the data is not needed. This will stop the data from being sent to the AzureDiagnostics table.
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3. **Understand Cost Implications:**
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Review the articles in the [reference section](#reference) to understand the costs associated with your Log Analytics workspace.
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1. Navigate to the diagnostic settings of the identified reference.
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1. Remove unnecessary diagnostic settings if the data is not required. This step stops the data from being sent to the AzureDiagnostics table.
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4. **Implement Cost Optimization Strategies**:
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3. Review the articles in the ["References" section](#reference) to understand the costs that are associated with your Log Analytics workspace.
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- Follow the best practices outlined in the Reference to optimize data usage and reduce costs.
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4. Follow the best practices that are outlined in the "References" section to optimize data usage and reduce costs.
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## Reference
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## References
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- [Understand Azure Monitor pricing](https://azure.microsoft.com/pricing/details/monitor/)
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- [Best Practices for Cost Management](/azure/azure-monitor/fundamentals/best-practices-cost)
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- [Cost Management for Logs](/azure/azure-monitor/logs/cost-logs)
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If the issue persists after following the solution steps, please open a support case for further assistance.
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If the issue persists after you follow the solution steps, open a support case for further assistance.

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