enq: CF - contention

Short Description

Enqueue wait on Control Files.

Additional Information

An enqueue is a wait for a resource held by another.

enq: CF is seen when a control file read or write is held up.

Control file reads and writes happen any time a database file is opened or closed, at log switch times, for backups, and checkpoints.

Ensure your control file copies are not competing with each other on the same disc device.

Look for multiple backups starting at the same time.

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