推荐几篇不错的解释Oracle基础概念的文章

一组关于lgwr处理过程相关的文章, 主要是强调log file sync等待的主要原因不是lgwr io而是lgwr processing.

Tuning ‘log file sync’ wait events By Riyaj Shamsudeen

LGWR I/O is Simple, But Not LGWR Processing By Kevin Closson

Don’t Forget ARCH When Pondering Redo By Kevin Closson

The “log file sync” wait event is not always spent waiting for an I/O By Christian Bilien

一篇Jonathan Lewis写的关于Undo设计的文章.
Why undo By Jonathan Lewis

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