oracle dba

http://www.oracleblog.org/category/study-note/

https://jonathanlewis.wordpress.com/

http://www.juliandyke.com/Presentations/Presentations.html#AdvancedDiagnosticsRevisited

http://blog.tanelpoder.com/

https://alexanderanokhin.wordpress.com/2011/11/13/dynamic-tracing-of-oracle-logical-io/

http://www.ahdba.com/53.html