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How many processes per disk drive are generally considered sufficient to perform a parallel recovery?

April 26, 2017disk drive parallel perform Processes recovery sufficient

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How many processes per disk drive are generally considered sufficient to perform a parallel recovery?

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1 or 2 Parallel recovery helps to reduce the Mean-Time-To-Recover. The Oracle Server allows you to utilize multiple threads to recover the database. For example, to issue a recovery process that uses 4 recovery processes and two instances, you would issue this command: RECOVER DATABASE PARALLEL DEGREE 4 INSTANCES 2; This command will initiate 8 recovery processes. To minimize I/O contention, it is sufficient to have 1 to 2 processes per disk drive.