How to find SQL Server queries that took a lot of time?

Question

I have application that is up more than 3 days. I can see in logs that there was a moment when application executed some SQL query and this took a lot of time, probably because of some db locks.

I heard that there is a query for such situations. So I need to be able to ask all queries that took, for example, more than 30 minutes. Is it possible?

Answer 1

give this a try:

SELECT TOP 10
    total_worker_time/execution_count AS Avg_CPU_Time
        ,execution_count
        ,total_elapsed_time/execution_count as AVG_Run_Time
        ,(SELECT
              SUBSTRING(text,statement_start_offset/2,(CASE
                                                           WHEN statement_end_offset = -1 THEN LEN(CONVERT(nvarchar(max), text)) * 2 
                                                           ELSE statement_end_offset 
                                                       END -statement_start_offset)/2
                       ) FROM sys.dm_exec_sql_text(sql_handle)
         ) AS query_text 
FROM sys.dm_exec_query_stats 
ORDER BY AVG_Run_Time DESC