Identifying top 20 most expensive queries in terms of read I/O (referred from Technet Magazine)

Published 15 November 07 06:16 AM | SQL Master 

It is worth mentioning the valueable query I have been through when referring to Technet Magazine, the following query has given me useful information in finding out what are my top 20 most expensive queries that are consuming most of disk I/O (read & write). November2007 magazine refers as follows:

SELECT TOP 20 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.min_logical_reads, qs.max_logical_reads,
qs.total_elapsed_time, qs.last_elapsed_time,
qs.min_elapsed_time, qs.max_elapsed_time,
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
WHERE qt.encrypted=0
ORDER BY qs.total_logical_reads DESC

Comments

# Other SQL Server Blogs around the Web said on November 15, 2007 7:27 AM:

It is worth mentioning the valueable query I have been through when referring to Technet Magazine, the

# SSQA.net - SqlServer-QA.net said on November 15, 2007 7:59 AM:

It is worth mentioning the valueable query I have been through when referring to Technet Magazine, the

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