In the course of researching a client problem I came across a good internals blog. Consider this article, which goes into how to examine the system state on a RAC system and concludes with some wisdom on caching in RAC sequences: Dynamic_plan_table, x$kqlfxpl and extreme library cache latch contention.
As always, Oracle internals is a realm that is somewhat abstruse, and when you have a problem the best thing to do is do a little MOS and Web research to see if there is an obvious solution and then open an SR at the appropriate level to get Oracle Support engaged. That way you are researching in parallel and, hopefully, will find a solution that much faster.
This week at the Oracle E-Business Suite Technology Blog:
JRE 1.6.0_20 Build 5 Fixes E-Business Suite Compatibility Issues
New Whitepaper: Advanced Compression 11gR1 Benchmarks with EBS 12
The Oracle ECM Alerts - Product News & Information has a new course announcement: First-Global-Teach for the Oracle Imaging and Process Management 11g: Administration: San Francisco | June 23-25
PeopleSoft and VIM
This is useful to any UNIX user, not just the PeopleSoft types: Using Vim to Count Patterns.
Oracle Policy Automation is another of those interesting products that we've acquired (it started out life called Haley). See more about it here at the SOA@Oracle SCA, BPEL, BPM & Service Bus blog: Oracle Policy Automation (OPA) on Linux
Richard Foote, the doctor of indexes, the professor of the vtree and guru of the mapping of bits, has a posting on the improvements to bitmap indexes from 10g forward: Bitmap Index Degradation Since 10g (Fix You)