database performance, sql tuning and data visualization
Thursday, October 22, 2009
Oracle DBA Views !
Ever wonder why some of those DBA_ views take so long to execute? here is the view expansion of a query from SYS.DBA_ALL_TABLES joined to SYS.DBA_OBJECTS Simple huh?!
Full size version here (blog seems to keep shrinking it) full size But if you are curious, just down load DB Optimizer at 14 day trial version and give it a shot with any view you want
Before working at Embarcadero I redesigned the performance pages in Oracles OEM 10g (see a before and after example). I am on the patent from the team for our tuning methodology (Patents: 20060059205) . I freely provide graphical monitoring tools such as ASHMON (TCL/TK) as well as scripts to profile database load such as S-ASH ie Simulated ASH (PLSQL). S-ASH, ASHMON and more are available at my old site http://ashmasters.com/ . I have made available C code to directly read profiling data out of Oracle's memory structures, called Direct Memory Access. I speak at conferences and give classes around the world.This blog has some of my new ideas on Visual SQL Tuning (VST), work on DB Optimizer, possibly some past material on DB performance monitoring as well as lots of references and pointers to other information on the web that I find important and worth emphasizing.
It might be simple. Hard to tell when I can't see what it is! Can't you link to an enlarged image?
ReplyDeletethe image is too small to read...
ReplyDeleteFull size version here (blog seems to keep shrinking it)
ReplyDeletefull size
But if you are curious, just down load DB Optimizer at
14 day trial version and give it a shot with any view you want