Oracle9i Database Reference
Release 1 (9.0.1)

Part Number A90190-02
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Static Data Dictionary Views, 256 of 521


DBA_ROLLBACK_SEGS

DBA_ROLLBACK_SEGS describes rollback segments.

Column  Datatype  NULL  Description 

SEGMENT_NAME 

VARCHAR2(30) 

NOT NULL 

Name of the rollback segment 

OWNER  

VARCHAR2(6) 

 

Owner of the rollback segment 

TABLESPACE_NAME 

VARCHAR2(30) 

NOT NULL 

Name of the tablespace containing the rollback segment 

SEGMENT_ID  

NUMBER 

NOT NULL 

ID number of the rollback segment 

FILE_ID 

NUMBER 

NOT NULL 

ID number of the file containing the segment head 

BLOCK_ID 

NUMBER 

NOT NULL 

ID number of the block containing the segment header 

INITIAL_EXTENT 

NUMBER 

 

Initial extent size in bytes 

NEXT_EXTENT 

NUMBER 

 

Secondary extent size in bytes 

MIN_EXTENTS 

NUMBER 

NOT NULL 

Minimum number of extents 

MAX_EXTENTS 

NUMBER 

NOT NULL 

Maximum number of extent 

PCT_INCREASE 

NUMBER 

NOT NULL 

Percent increase for extent size 

STATUS  

VARCHAR2(16) 

 

Rollback segment status 

INSTANCE_NUM 

VARCHAR2(40) 

 

Rollback segment owning Oracle Real Application Cluster instance number  

RELATIVE_FNO 

NUMBER 

NOT NULL 

Relative file number of the segment header 


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