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A Question about some of  Oracle hidden parameters

Posted on 2012-03-17
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Last Modified: 2012-04-01
Dear Sir,

Can you please explain me the purpose and usage of following Oracle Parameters.

(1).  _first_spare_parameter
(2). _third_spare_parameter
(3). _fourth_spare_parameter

Thank You in advance.
Pradeep.
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Question by:Pradeep Siriwardana
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Bajwa earned 500 total points
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http://apps.cocreate.com/downloads/EU-OSM/software/oracle/CPU-Jan-2010/10.2.0.4/win64/README.html


_first_spare_parameter is used by bug 6904068 in this bundle patch.
This parameter is not a simple on/off switch and it can take any numeric value. This fix should really not be used/turned on by customers who don't need it

_third_spare_parameter is used by bug 7452373 in this bundle patch.
This can be set to 100 in init.ora if there is a regression in "log file sync" after applying the patch.

_fourth_spare_parameter is used by bug 6661393. DBA may like to set _fourth_spare_parameter in init.ora
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