When to use unsupported parameters _corrupt_rollback_segments and others.
Last updated on SEPTEMBER 28, 2011
Applies to:Oracle Server - Enterprise Edition - Version: 18.104.22.168 to 22.214.171.124 - Release: 8.0.6 to 11.2
Information in this document applies to any platform.
unsupport parameters to open a database. Two of these parameters are _OFFLINE_ROLLBACK_SEGMENTS and
What are _OFFLINE_ROLLBACK_SEGMENTS and _CORRUPTED_ROLLBACK_SEGMENTS?
_OFFLINE_ROLLBACK_SEGMENTS is a unsupported init.ora parameter which can allow you to cause logical database corruption.
_CORRUPTED_ROLLBACK_SEGMENTS is more dangerous parameter than _OFFLINE_ROLLBACK_SEGMENTS. It basically prevents access to the listed rollback segments headers and assumes all transactions in them are committed. This can very easily cause logical database corruption.
It is imperative that these parameters are not used without contacting
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