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How to change existing subpartitions extent size

edited Aug 7, 2019 7:48AM in Database DataWarehousing (MOSC) 5 commentsAnswered

Hi Oracle Community users,

I have an Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production under my protection. In db there are a lot of tables which are partitioned by time (one partition per day) and each partition is sub-partitioned by range-hash (32 subpartitions per each partition). After a few months I've noticed that tablespaces usage is very high despite the fact that there is not so much data in tables. After analyze I've found that each subpartition initial extent size is 8MB (so - one-day partition consumes 32 x 8MB = 256MB of space even it is empty). After fast searching

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