Change segment space management to manual

 · Oracle. How to change Segment Space Management of a tablespace from MANUAL to AUTO? How? – Backup the tablespace – Export the tablespace data – Drop and re-allocate the tablespace – Import the tablespace. Old Tablespace: SQL select tablespace_name, segment_space_management from dba_tablespaces where tablespace_name=’TBS_TEST Author: Surachart Opun. The second major tablespace enhancement in Oracle9i, was automatic segment space management (ASSM). a.k.a. bitmap www.doorway.ru ASSM, the linked-list freelists are replaced with bitmaps, a binary array that turns out to be very fast and efficient for managing storage extents and free blocks, thereby improving segment storage internals. The SEGMENT_SPACE_MANAGEMENT column in the DBA_TABLESPACES and USER_TABLESPACES views indicates the type of segment management used within each tablespace, AUTO or MANUAL. To upgrade an existing object to use automatic freespace management simply create a new tablespace and use the ALTER.

The second major tablespace enhancement in Oracle9i, was automatic segment space management (ASSM). a.k.a. bitmap www.doorway.ru ASSM, the linked-list freelists are replaced with bitmaps, a binary array that turns out to be very fast and efficient for managing storage extents and free blocks, thereby improving segment storage internals. SQL select tablespace_name, segment_space_management from dba_tablespaces where tablespace_name='TBS_TEST'; no rows selected SQL create tablespace tbs_test datafile size 10M autoextend on next 1M segment space management auto; Tablespace created. Oracle. How to change Segment Space Management of a tablespace from MANUAL to AUTO? How? – Backup the tablespace – Export the tablespace data – Drop and re-allocate the tablespace – Import the tablespace. Old Tablespace: SQL select tablespace_name, segment_space_management from dba_tablespaces where tablespace_name=’TBS_TEST.

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