【oracle11g，13】表空間管理2：undo表空間管理(調優) ，閃回原理
阿新 • • 發佈：2019-01-01
SQL> col segment_name for a10
SQL> col status for a10;
SQL> select segment_name,extent_id,file_id,blocks,bytes/1024 k,status from dba_undo_extents;
SEGMENT_NA EXTENT_ID FILE_ID BLOCKS K STATUS
---------- ---------- ---------- ---------- ---------- ----------
_SYSSMU10$ 0 2 8 64 EXPIRED
_SYSSMU10$ 1 2 8 64 EXPIRED
_SYSSMU10$ 2 2 128 1024 EXPIRED
_SYSSMU10$ 3 2 128 1024 EXPIRED
_SYSSMU10$ 4 2 128 1024 EXPIRED
_SYSSMU10$ 5 2 128 1024 EXPIRED
_SYSSMU10$ 6 2 128 1024 EXPIRED
_SYSSMU9$ 0 2 8 64 EXPIRED
_SYSSMU9$ 1 2 8 64 EXPIRED
_SYSSMU9$ 2 2 128 1024 EXPIRED
_SYSSMU9$ 3 2 128 1024 EXPIRED
SEGMENT_NA EXTENT_ID FILE_ID BLOCKS K STATUS
---------- ---------- ---------- ---------- ---------- ----------
_SYSSMU9$ 4 2 128 1024 EXPIRED
_SYSSMU9$ 5 2 128 1024 EXPIRED
_SYSSMU9$ 6 2 128 1024 EXPIRED
_SYSSMU9$ 7 2 128 1024 EXPIRED
_SYSSMU9$ 8 2 128 1024 EXPIRED
_SYSSMU8$ 0 2 8 64 EXPIRED
_SYSSMU8$ 1 2 8 64 EXPIRED
_SYSSMU8$ 2 2 128 1024 EXPIRED
_SYSSMU7$ 0 2 8 64 EXPIRED
_SYSSMU7$ 1 2 8 64 EXPIRED
_SYSSMU7$ 2 2 128 1024 EXPIRED
SEGMENT_NA EXTENT_ID FILE_ID BLOCKS K STATUS
---------- ---------- ---------- ---------- ---------- ----------
_SYSSMU7$ 3 2 128 1024 EXPIRED
_SYSSMU6$ 0 2 8 64 EXPIRED
_SYSSMU6$ 1 2 8 64 EXPIRED
_SYSSMU6$ 2 2 128 1024 EXPIRED
_SYSSMU5$ 0 2 8 64 EXPIRED
_SYSSMU5$ 1 2 8 64 EXPIRED
_SYSSMU5$ 2 2 128 1024 EXPIRED
_SYSSMU4$ 0 2 8 64 EXPIRED
_SYSSMU4$ 1 2 8 64 EXPIRED
_SYSSMU4$ 2 2 8 64 EXPIRED
_SYSSMU4$ 3 2 8 64 EXPIRED
SEGMENT_NA EXTENT_ID FILE_ID BLOCKS K STATUS
---------- ---------- ---------- ---------- ---------- ----------
_SYSSMU4$ 4 2 8 64 EXPIRED
_SYSSMU4$ 5 2 8 64 EXPIRED
_SYSSMU4$ 6 2 8 64 EXPIRED
_SYSSMU4$ 7 2 8 64 EXPIRED
_SYSSMU4$ 8 2 8 64 EXPIRED
_SYSSMU4$ 9 2 8 64 EXPIRED
_SYSSMU4$ 10 2 8 64 EXPIRED
_SYSSMU4$ 11 2 8 64 EXPIRED
_SYSSMU4$ 12 2 8 64 EXPIRED
_SYSSMU4$ 13 2 8 64 EXPIRED
_SYSSMU4$ 14 2 8 64 EXPIRED
SEGMENT_NA EXTENT_ID FILE_ID BLOCKS K STATUS
---------- ---------- ---------- ---------- ---------- ----------
_SYSSMU4$ 15 2 128 1024 EXPIRED
_SYSSMU4$ 16 2 8 64 EXPIRED
_SYSSMU3$ 0 2 8 64 UNEXPIRED
_SYSSMU3$ 1 2 8 64 UNEXPIRED
_SYSSMU3$ 2 2 128 1024 UNEXPIRED
_SYSSMU3$ 3 2 128 1024 EXPIRED
_SYSSMU3$ 4 2 128 1024 UNEXPIRED
_SYSSMU2$ 0 2 8 64 EXPIRED
_SYSSMU2$ 1 2 8 64 EXPIRED
_SYSSMU2$ 2 2 128 1024 EXPIRED
_SYSSMU2$ 3 2 128 1024 EXPIRED
SEGMENT_NA EXTENT_ID FILE_ID BLOCKS K STATUS
---------- ---------- ---------- ---------- ---------- ----------
_SYSSMU1$ 0 2 8 64 EXPIRED
_SYSSMU1$ 1 2 8 64 EXPIRED
_SYSSMU1$ 2 2 128 1024 EXPIRED
_SYSSMU1$ 3 2 128 1024 EXPIRED
59 rows selected.