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Reclaiming OS disk space after truncating partitions. Has a step-by-step process been created?

in Database Administration (MOSC) 5 commentsAnswered ✓

Oracle Database v19c on Linux RHEL 8 system.

We have a few 2-3 TB tables in our database. We have only 10% DATA ASM space available. We have been told no new space can be purchased and we must find a way to reduce the amount of space used by this database.

The 2-3TB tables are partitioned. Partitions and tablespaces were designed in a very odd way by previous DBAs. They created tablespaces that would only store data for a specific year and quarter. For example: 2010_q1 stores JAN, FEB, MAR data from 2010 and 2011_q2 stores data for 2011 APR, MAY, JUN. I personally would never do this but they did. We have identified these few very large tables with old data the customer wants deleted. Customer needs at least 1 TB of OS disk space free.

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