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We have Oracle as our RDBMS. In the past we've used SQL ANALYZE to analyze the tables. We had been told by our DBAs that using dbms_stats was more efficient but we weren't able to get it working. IBI helped us to get the correct syntax so I wanted to pass it along for others. Note that the dbms_stats statement and options need to be on 1 line. I used <> to indicate where you would need to replace with your information. In our test the ANALYZE took 28 minutes and the dbms_stats only 17 minutes.
SQL SQLORA SET SERVER <database>;
ex sys.dbms_stats.gather_table_stats ownname => '<table owner>', tabname =>'<table name>', estimate_percent => 10, method_opt => 'for all indexed columns',cascade => TRUE, degree =>6;
This message has been edited. Last edited by: Kerry,
WebFOCUS 7.7.05M, gen 144, Windows 2008 Server R2 64-bit, Tomcat 6.0.33, IIS 7.0, SQL Server, Excel 2013, PDF, HTML, FOCUS files.
Posts: 88 | Location: Seattle | Registered: March 29, 2007
Bob, thanks much for the post and for sharing this performance enhancing information. Do you run dbms_stats after every table load, or only after loads/updates for tables of a certain size?This message has been edited. Last edited by: Dan Satchell,
Posts: 1213 | Location: Seattle, Washington - USA | Registered: October 22, 2007