SQL SERVER – Find Most Expensive Queries

Some times using wrong keys while coding will result in the performance ,to find out such expensive queries in sql 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 You can change the ORDER BY clause to order this table with different parameters. I […]

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