SQL Server Management Studio can report connection timeout issues, even though the problem is memory

Sometimes SQL Server Management Studio (SSMS) reports a connection timeout error when the actual problem is that the SQL Server service is low on memory or not responding promptly to connection attempts.

For example, you might see:

Cannot connect to MYSERVER.
A network-related or instance-specific error occurred...

This can happen even if the network is fine and other servers are reachable.

If this occurs, check the SQL Server error log next for messages such as:

There is insufficient system memory in resource pool 'default' to run this query.

If you find those, the fix is not in connection settings but in the server's memory configuration:

• Ensure SQL Server has a reasonable max server memory setting.
• Verify there is enough free physical memory on the machine. Task Manager will tell this quickly.
• Restarting the service might help temporarily, but it's better to address the configuration issues directly.

SSMS sometimes reports a timeout as a symptom when the root cause is SQL Server being unresponsive. When troubleshooting, always check both the network layer and the SQL Server logs.

Hope this helps!