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ORA-01653: unable to extend table in tablespace string tips

Oracle Error Tips by Burleson Consulting (S. Karam)

 

The Oracle docs note this on the ora-01653 error:

 

ORA-01653: unable to extend table string.string by string in tablespace string
Cause: Failed to allocate an extent of the required number of blocks for a table segment in the tablespace indicated.

Action: Use ALTER TABLESPACE ADD DATAFILE statement to add one or more files to the tablespace indicated.

Oracle MOSC Documents offer great resources on resolving ORA-01653,  namely the nature of the problem as it relates to space availability:

Explanation:
------------
This error does not necessarily indicate whether or not you have enough space
in the tablespace, it merely indicates that Oracle could not find a large enough area of free
contiguous space in which to fit the next extent.


Diagnostic Steps:
-----------------
1. In order to see the free space available for a particular tablespace, you must
use the view DBA_FREE_SPACE. Within this view, each record represents one
fragment of space. How the view DBA_FREE_SPACE can be used to determine
the space available in the database is described in Note 121259.1 Using DBA_FREE_SPACE

Furthermore, MOSC offers these choices in resolving ORA-01653 (as quoted below):

  1. Manually COALESCE Adjacent Free Extents
  2. Add a DATAFILE
  3. Resize DATAFILE
  4. Enable AUTOEXTEND
  5. Defragment tablespace
  6. View temporary segments for space

 

 

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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

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