Transaction is written to the log file and it is not written to undo tablespace. During a failure of the system how oracle rolls back the transaction.

Hi all

My question is:

Transaction is written to the log file and it is not written to undo tablespace.

During a failure of the system how oracle rolls back the transaction.

I have already provided the answer, you ignored if well (you seem to only read the responses by people of your country).

Redo log is always written * first * before * writing to the data block (redo log writing is much more aggressive). So it DOESN 'T MATTER if you lose these scriptures of rollback segment.

Valuation: rear roller followed by roll forward, using redo log files and/or archive redo log files.

Sybrand Bakker

Senior Oracle DBA

Tags: Database

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