Oracle DBA - What is the advantage of using locally managed tablespaces?

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What is the advantage of using locally managed tablespaces?

Total Answers and Comments: 2

Last Update: November 01, 2007

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February 20, 2006 03:03:34

innovative

Member Since: February 2006 Contribution: 11

RE: What is the advantage of using locally managed tab...

data dict. contention is less prone to contention coz when there is dict. managed tablespaces the info about them is stored in dictionary and to manage it manually is very confusing so it is better to use automatic management. as in 8i rollback segments were used u can ask any dba working on oracle 8i he will agree for automatic.....

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November 01, 2007 08:34:56

Mohammed Abdul Afroze

RE: What is the advantage of using locally managed tab...

Advantages in using Locally Managed Tablespaces:Because locally managed tablespaces do not record free space in data dictionary, it reduces contention on these tables.
Local management of extents automatically tracks adjacent free space, eliminating the need to coalesce free extents.
Avoids recursive space management operations, which can occur in dictionary-managed tablespaces if consuming or releasing space in an extent results in another operation that consumes or releases space in a rollback segment or data dictionary table.
Sizes of extents that are managed locally can be determined automatically by the system. Alternatively, all extents can have the same size in a locally managed tablespace.
Changes to the extent bitmaps do not generate rollback information because they do not update tables in the data dictionary (except for special cases such as tablespace quota information).
Reduced fragmentation .

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