Are SQL Server timeouts logged?

Question

Are SQL Server timeouts (SELECT queries, in particular) logged in the ERRORLOG file?

Background is a customer with a web site having occasional \"Request timeout\" messa

Answer 1

No. You will need to use SQL Profiler. A standard trace with the Lock Timeout event and Deadlock Graph events should do it.

• Lock:Timeout Event Class

• Deadlock Graph Event Class

Hardware aside (such as enough RAM and fast drives, and appropriate placement of Data and Log files on the appropriate RAID configurations) most timeouts are caused by not having a sufficently 'good' set of indexes for your workload.

Do you have index maintenance plans scheduled regularly?