Top 10 Expensive Queries In Oracle. This paper lists 10 tips that every developerDBA should consider when designing their database or writing SQL scripts. For every cached execution plan SQL Server stores detailed information about how this execution plan performed at runtime.
Limit results to only the top row from the query partitions costrank1. Select sttext AS Query Text wtlast_execution_time AS Last Execution Time wtexecution_count AS Execution Count wttotal_worker_time1000000 AS Total CPU Timesecond. The title of this post is what I can express here for this quick blog post.
SELECT sql_id child_number sql_fulltext elapsed_time executions round elapsed_time_avg elapsed_time_avg FROM SELECT command_type sql_id child_number sql_fulltext elapsed_time cpu_time disk_reads executions elapsed_time executions.
Partition the vsql_plan result by sql_id and child number to get a ranking of the most expensive execution plan operation for this cursor pre-filtered by the last bullet in this list. The top-N query in Oracle is not as easy to create as those in MS SQL Server TOP n keyword or MySQL LIMIT keyword. I would run statspack to gather the sql queries. Top 10 total CPU consuming queries SELECT TOP 10 QTTEXT AS STATEMENT_TEXT QPQUERY_PLAN QSTOTAL_WORKER_TIME AS CPU_TIME FROM SYSDM_EXEC_QUERY_STATS QS CROSS APPLY SYSDM_EXEC_SQL_TEXT QSSQL_HANDLE AS QT CROSS APPLY SYSDM_EXEC_QUERY_PLAN QSPLAN_HANDLE AS QP ORDER BY.