Query times out when executed from web, but super-fast when executed from SSMS

Question

I\'m trying to debug the source of a SQL timeout in a web application that I maintain. I have the source code of the C# code behind, so I know exactly what code is running.

Answer 1

Just using ARITHABORT wont solve the problem, especially if you use parameterised stored procedures.

Because parameterised stored procedures can cause "parameter sniffing", which uses cached query plan

So, before jumping into conclusion, please check below link.

the-elephant-and-the-mouse-or-parameter-sniffing-in-sql-server