> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/rdm/knowledge-base/troubleshooting-articles/sqlexception-timeout-expired.md).

# SqlException - timeout expired

`SqlException - timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.`

This error occurs when an SQL operation takes too long to complete, often because the server is unresponsive or the query exceeds the configured timeout period.

### Solution

Large amounts of historical or log data in the database can cause slow responses. Use the [Clean up](https://docs.devolutions.net/rdm/commands/administration/) feature to prune unnecessary data and improve performance.


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