I want to create a catalog database for my primary and standby databases. The size of the primary database is 1.6TB, so what should be the size of the catalog database or tablespace?

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The size of your RMAN catalog is pretty small and not necessarily dependent on the size of your database. I typically start my RMAN catalog tablespace at 100MB and set it to auto-increment in 100MB sizes. However, I rarely see this tablespace grow much above 100MB in my environments.

This was first published in December 2006

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