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Oracle Database Undo Segment Operation Concept
- 4. Extent
1
Extent
2
Tx1
Tx2
Tx3
undo
segment
1
Tx4
Tx5
Tx6
Tx7
Extent
3
ext1
ext2
ext3
Allocate
New
Extent
Extent
1
is
ACTIVE/INACTIVE
extent
- 5. Extent
1
Extent
2
Tx1
Tx2
Tx3
undo
segment
1
Tx4
Tx5
Tx6
Tx7
ext1
ext2
Extent
1
is
EXPIRED
extent