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How to find CPU expensive queries

Antonios Chatzipavlis

Wednesday 12 February 2014

CPUAuditingBenchmarksDB DeveloperDBAIT ProfessionalMonitoringPerformance / TunningTips & TricksTroubleshooting

Πριν από πολλά χρόνια είχα γράψει ένα σχετικό post με μια stored procedure. Με τα χρόνια αυτό άλλαζε καθώς οι ανάγκες και οι δυνατότητες άλλαζαν. Απλά σήμερα έτυχε να το χρησιμοποιήσω πάλι και λέω δε το μοιράζομαι με τον κόσμο όλο και κάποιος θα το χρειαστεί.

Δουλεύει σε SQL Server 2008, 2008R2, 2012, 2014

Όλοι οι χρόνοι είναι σε microseconds

SELECT TOP 50 
          qs.creation_time
        , qs.execution_count
        , qs.total_worker_time as total_cpu_time
        , qs.max_worker_time as max_cpu_time
        , qs.total_elapsed_time
        , qs.max_elapsed_time
        , qs.total_logical_reads
        , qs.max_logical_reads
        , qs.total_physical_reads
        , qs.max_physical_reads
        , t.[text]
        , qp.query_plan
        , t.dbid
        , t.objectid
        , t.encrypted
        , qs.plan_handle
        , qs.plan_generation_num
FROM sys.dm_exec_query_stats qs 
CROSS APPLY sys.dm_exec_sql_text(plan_handle) AS t
CROSS APPLY sys.dm_exec_query_plan(plan_handle) AS qp
ORDER BY qs.total_worker_time DESC

Enjoy :)

/*antonch*/

Antonios Chatzipavlis

Antonios is a Data Solutions Consultant and Trainer. He has been working in IT since 1988. In his career, he has worked as senior developer, IT Manager, Solutions Architect and IT Consultant. Since 1995 he has been devoted on new technologies and software development tools, mainly by Microsoft, either by training company staff and colleagues or assisting them in design, development and implementation as a consultant or chief developer. He has focused in Databases and Data Science since 1995. He specialized in Microsoft SQL Server since version 6.0 in areas like SQL Server Internals, Database Design and Development, Business Intelligence and in 2010 he has started working with Azure Data Platform, NoSQL databases, Big Data Technologies and Machine Learning. He is an active member of many IT communities in Greece, answering colleagues' questions and writing articles in his web site. He is the owner of SQLschool.gr which is a community portal with a lot of information about Microsoft SQL Server. He has been a Microsoft Certified Trainer (MCT) since 2000. Microsoft honored him as MVP on Data Platform due to his activities in SQL Server since 2010. He holds a large number of Microsoft Certifications and Microsoft SQL Server Certifications since version 6.5.