RE: Locally managed tablespace

Except that if you migrate (using dbms_space_admin) or create new without specifying space management automatic, you only kinda don't use the data dictionary. If you take default (manual) space management or you migrate data dictionary managed tablespaces... you get the added "feature" (maintained for backward compatibility) of having to use percent free, and all the other stuff that locally managed is supposed to free you up from.

Oh... and the only way to get a manual space managed tablespace to be a automatic space managed tablespace... recreate the tablespace and move the tables and rebuild the (now unusable) indexes... or export, recreate tablespace, import... OR drop table, recreate tablespace, recreate table...

Not ENTIRELY in the Concepts guide...

April Wells
Oracle DBA/Oracle Apps DBA
Corporate Systems
Amarillo Texas
Well-behaved women rarely make history

-----Original Message-----
Sent: Tuesday, April 22, 2003 8:47 AM
To: Multiple recipients of list ORACLE-L

A Locally Managed Tablespace is a tablespace that manages its own extents maintaining a bitmap in each datafile to keep track of the free or used status of blocks in that datafile. Each bit in the bitmap corresponds to a block or a group of blocks. When the extents are allocated or freed for reuse, Oracle changes the bitmap values to show the new status of the blocks. These changes do not generate rollback information because they do not update tables in the data dictionary (except for tablespace quota information), like the default method of Dictionary - Managed Tablespaces does.

>>> vsantosh_at_psi.soft.net 04/22/03 01:19AM >>>
Hello list,

    Could anyone of you explain the concept of Locally managed tablespace ?

Regards,
Santosh

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