SQL Server Query Slow from PHP, but FAST from SQL Mgt Studio - WHY?

Question

I have a fast running query (sub 1 sec) when I execute the query in SQL Server Mgt Studio, but when I run the exact same query in PHP (on the same db instace) using FreeTDS

Answer 1

Using the LOGIN EVENT (and EXISTING CONNECTION) in SQL Profiler with the Text column will show the connection settings of a lot of important SET commands--Arithabort, Isolation Level, Quoted Identifier, and others. Compare and contrast these between the fast and slow connections to see if anything stands out.