Locally Managed Tablespaces
Space management within a tablespace involves keeping track of available (free) and
used space, so that space is allocated efficiently during data insertion and deletion.
Locally managed tablespaces keep the space allocation information within the
tablespace, not in the data dictionary, thus offering better performance. By default,
Oracle Database sets all newly created tablespaces to be locally managed with
automatic segment management, a feature that further improves performance.
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