Find Most Expensive Queries

Expensive Queries

SELECT 
  TOP 10 
  SUBSTRING(qt.TEXT, (qs.statement_start_offset/2)+1,((CASE qs.statement_end_offset WHEN -1 THEN DATALENGTH(qt.TEXT) ELSE qs.statement_end_offset END - qs.statement_start_offset)/2)+1),
  qs.execution_count,
  qs.total_logical_reads, qs.last_logical_reads,
  qs.total_logical_writes, qs.last_logical_writes,
  qs.total_worker_time,
  qs.last_worker_time,
  qs.total_elapsed_time/1000000 total_elapsed_time_in_S,
  qs.last_elapsed_time/1000000 last_elapsed_time_in_S,
  qs.last_execution_time,
  qp.query_plan
FROM 
  sys.dm_exec_query_stats qs
  CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) qt
  CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp
ORDER BY qs.total_logical_reads DESC -- logical reads
-- ORDER BY qs.total_logical_writes DESC -- logical writes
-- ORDER BY qs.total_worker_time DESC -- CPU time