Time Out for SQL Timeouts
Knowledge Base Article
An import is failing after a long time, can't add a new page in a complex part of the tree, getting errors hosting on a server with low resources? Most likely, the culprit is the same every time. Check the Event log, it's the dreaded SQL timeout: Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding. The statement has been terminated. Let's find out what's going on and what you can do about it.