How to identify slow running queries in Sql Server
Recently, I was trying to pin point the queries in an application that were causing Sql Server to spike the CPU at 100%. This query was helpful in finding the top offenders.
SELECT creation_time ,last_execution_time ,total_physical_reads ,total_logical_reads ,total_logical_writes ,execution_count ,total_worker_time ,total_elapsed_time ,total_elapsed_time / execution_count avg_elapsed_time ,SUBSTRING(st.text, (qs.statement_start_offset/2) + 1 ,((CASE statement_end_offset WHEN -1 THEN DATALENGTH(st.text) ELSE qs.statement_end_offset END - qs.statement_start_offset)/2) + 1) AS statement_text FROM sys.dm_exec_query_stats AS qs CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st ORDER BY total_elapsed_time / execution_count DESC;
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