Q:RAC undocmentment parameters

Hi all ,

one of my team member is arguing the following parameters may be help to improve performance to use in RAC  

1. _Interconnect_Checksum= FALSE
2. _Cr_Server_Log_Flush= FALSE
3. _immediate_Commit_Propagation= FALSE
4. Commit_Write= "BATCH, NOWAIT"
5. _Optim_Peek_User_Binds= FALSE

I wander if anyone has experience with those parameters. (I'm aware the setting hidden parameters is not good practice :-)  

We've RAC 10.2.0.2 on hp-itanuim  

Amihay Gonen
Dba Team Leader
PD Division
ECTel Ltd.    

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