Azure Database For PostgreSQL flexible Server - Internal Server Error when trying to update server parameters

Hello Sefa, Thank you for asking your question on the Microsoft Q&A portal.

What I have understood is that You're encountering an Internal Server Error when redeploying server parameters in Azure Database for PostgreSQL Flexible Server, specifically after specifying a parameter value (possibly a configuration setting). The error message is generic and lacks detail, which makes troubleshooting difficult. This typically indicates a backend issue or invalid input that isn't surfaced clearly.

Azure Database for PostgreSQL Flexible Server returned an internal server error during parameter update, likely due to invalid or unsupported configuration values, resource state issues, or platform-side transient problems.

Can you help me with your inputs on my following questions?

1. Which specific parameter and value are you trying to set? (e.g., max_connections, work_mem, etc.)
2. Are you using the Azure Portal, CLI, PowerShell, or ARM templates to apply the change?
3. Have you checked the Azure Activity Log (if there are any) for additional details around the failed operation?
4. Did the server recently undergo any maintenance, scale operations, or failover events?
5. Have you checked for any known service issues with Azure Database for PostgreSQL at the time of the failure? (Check Azure Status ). If not, then kindly check the same as well.

Troubleshooting Steps:

• Check if you have used valid parameters, Not all PostgreSQL settings are supported or modifiable in Flexible Server. Only certain parameters can be changed online. Check the list of supported parameters here: https://learn.microsoft.com/en-us/azure/postgresql/flexible-server/concepts-server-parameters
• Avoid unsupported or invalid values For example, setting max_connections too high might trigger validation errors. Always verify the acceptable range.
• Use the Azure Portal → Monitor → Activity Log, filter by your resource group and resource, and look for more detailed error messages or related events.
• Try changing one parameter at a time to isolate the problematic setting.
• Use Azure CLI to get more verbose output:

    az postgres flexible-server parameter set \
      --resource-group <your-resource-group> \
      --server-name <your-server-name> \
      --name <parameter-name> \
      --value <your-value>
  

  This may return more specific error messages than the portal. Also, Internal Server Errors can be transient. Wait a few minutes and retry the operation with a small, known-good parameter change (e.g., idle_session_timeout).
• If the issue persists, use the tracking ID provided (66240baf-2c92-4491-bd80-3ed22ab73035) to open a support ticket. Microsoft Support can investigate the backend logs.

For your Reference:

• https://learn.microsoft.com/en-us/azure/postgresql/flexible-server/concepts-server-parameters
• https://learn.microsoft.com/en-us/azure/azure-resource-manager/troubleshooting/common-deployment-errors
• https://status.azure.com/status

Please "Accept as Answer" if the answer provided is useful, so that you can help others in the community looking for remediation for similar issues.

Thanks

Pratyush