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VIEW: SYS.USER_SEGMENTS

Object Details
Object Name: USER_SEGMENTS
Object Type: VIEW
Owner: SYS
Subobject Name:
Status: VALID

Storage allocated for all database segments

[View Source]

Columns
Name Datatype Length Mandatory Comments
SEGMENT_NAME VARCHAR2 (128)
Name, if any, of the segment
PARTITION_NAME VARCHAR2 (128)
Partition/Subpartition Name, if any, of the segment
SEGMENT_TYPE VARCHAR2 (18)
Type of segment: "TABLE", "CLUSTER", "INDEX", "ROLLBACK", "DEFERRED ROLLBACK", "TEMPORARY", "SPACE HEADER", "TYPE2 UNDO" or "CACHE"
SEGMENT_SUBTYPE VARCHAR2 (10)
SubType of Lob segment: "SECUREFILE", "ASSM", "MSSM", NULL
TABLESPACE_NAME VARCHAR2 (30)
Name of the tablespace containing the segment
BYTES NUMBER

Size, in bytes, of the segment
BLOCKS NUMBER

Size, in Oracle blocks, of the segment
EXTENTS NUMBER

Number of extents allocated to the segment
INITIAL_EXTENT NUMBER

Size, in bytes, of the initial extent of the segment
NEXT_EXTENT NUMBER

Size, in bytes, of the next extent to be allocated to the segment
MIN_EXTENTS NUMBER

Minimum number of extents allowed in the segment
MAX_EXTENTS NUMBER

Maximum number of extents allowed in the segment
MAX_SIZE NUMBER

Maximum number of blocks allowed in the segment
RETENTION VARCHAR2 (7)
Retention option for SECUREFILE segment
MINRETENTION NUMBER

Minimum Retention Duration for SECUREFILE segment
PCT_INCREASE NUMBER

Percent by which to increase the size of the next extent to be allocated
FREELISTS NUMBER

Number of process freelists allocated to this segment
FREELIST_GROUPS NUMBER

Number of freelist groups allocated to this segment
BUFFER_POOL VARCHAR2 (7)
The default buffer pool to be used for blocks from this segment
FLASH_CACHE VARCHAR2 (7)
CELL_FLASH_CACHE VARCHAR2 (7)
INMEMORY VARCHAR2 (8)
Whether in-memory is enabled or not
INMEMORY_PRIORITY VARCHAR2 (8)
User defined priority in which in-memory column store object is loaded
INMEMORY_DISTRIBUTE VARCHAR2 (15)
How the in-memory columnar store object is distributed
INMEMORY_DUPLICATE VARCHAR2 (13)
How the in-memory column store object is duplicated
INMEMORY_COMPRESSION VARCHAR2 (17)
Compression level for the in-memory column store option
Query Text

Cut, paste (and edit) the following text to query this object:


SELECT SEGMENT_NAME
,      PARTITION_NAME
,      SEGMENT_TYPE
,      SEGMENT_SUBTYPE
,      TABLESPACE_NAME
,      BYTES
,      BLOCKS
,      EXTENTS
,      INITIAL_EXTENT
,      NEXT_EXTENT
,      MIN_EXTENTS
,      MAX_EXTENTS
,      MAX_SIZE
,      RETENTION
,      MINRETENTION
,      PCT_INCREASE
,      FREELISTS
,      FREELIST_GROUPS
,      BUFFER_POOL
,      FLASH_CACHE
,      CELL_FLASH_CACHE
,      INMEMORY
,      INMEMORY_PRIORITY
,      INMEMORY_DISTRIBUTE
,      INMEMORY_DUPLICATE
,      INMEMORY_COMPRESSION
FROM SYS.USER_SEGMENTS;

Dependencies

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SYS.USER_SEGMENTS references the following:

SchemaSYS
PL/SQL PackageDBMS_SPACE_ADMIN - show dependent code
ViewSYS_USER_SEGS
SYS.USER_SEGMENTS is referenced by following:

SchemaPUBLIC
SynonymUSER_SEGMENTS