Helmut’s RAC 11g/12c intial post

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Article Clusters:   Debug     12c-New-Feature    ASM   Clusterware     RAC    RAC-Performance   RAC-Networking   RAC-Tools


Recently updated articles :

XA : Java code for a simple TPM 12c: VIP/Application failover on LEAF Nodes 12c : Pluggable Databases
XA : RAC and Performane for XA Tx 12c/11g: Serverpools 12c: FLEX ASM 


Useful articles :                                                                                  Overview of all my 11g/12c RAC articles

A closer look on Cache Fusion II Debugging Node Eviction using TFA, CHM, OSWatcher Debugging Clusterware
Troubleshooting Clusterware startup problems Debugging Network problems using a bash script Recovering corrupted OLR, OCR
Performance: GES Locks and Deadlocks Performance: GC buffer busy aquire/release waits Performance: GCS log flush sync waits
Performance: LOG File SYNC waits
  • My initial blogging is about  my expieriences with  RAC systems on Linux
  • Most of the articles are using following infrastructure;  Virtualbox 4.2.14 on top of OEL 63/OEL64.
  • Use the Menubar to navigate through all the articles or press the HOME button of the menu to get displayed all  RAC related articles ( preferred method as can you get a quick overview  about all articles)
  • Note this Blog will not produce any new Post – only new pages will be added over time. This allows me to create a main menu where you can easily navigate and find  interested page grouped by  certain topics.


  • This blog represent the work and opinions of the author and do not constitute official positions of my current employer Oracle  (working for the Oracle RAC support team ).
  • This material has been  reviewed, but author assume no responsibility whatsoever for the test cases.
  • If you corrupt your databases by running my scripts, you are solely responsible for that.