数据库的undotbs占用空间太大，磁盘空间有点紧，先把undotbs重建一下。
创建新的UNDO表空间
SQL> CREATE SMALLFILE UNDO
2 TABLESPACE "UNDOTBS2"
3 DATAFILE '/sysion/oracle/oradata/UNDOTBS2A.dbf' SIZE 1000M
4 AUTOEXTEND
5 ON NEXT 10M MAXSIZE UNLIMITED, '/sysion/oracle/oradata/
6 UNDOTBS2B.dbf' SIZE 1000M AUTOEXTEND
7 ON NEXT 10M MAXSIZE UNLIMITED
8 /
附：这个地方由于目录名于文件名不在同一行，导致实际的文件UNDOTBS2B.dbf名前面多了个空格，下次一定要注意！！！
Tablespace created
SQL>
SQL> select usn,xacts,status,rssize/1024/1024/1024,hwmsize/1024/1024/1024,shrinks
2 from v$rollstat order by USN;
USN XACTS STATUS RSSIZE/1024/1024/1024 HWMSIZE/1024/1024/1024 SHRINKS
---------- ---------- --------------- --------------------- ---------------------- ----------
0 0 ONLINE 0.00035858154296875 0.00035858154296875 0
1 0 ONLINE 0.0284347534179688 0.174919128417969 1092
2 0 ONLINE 0.0196456909179688 0.161247253417969 1343
3 0 ONLINE 0.0206222534179688 0.546989440917969 1536
4 0 ONLINE 0.0440597534179688 0.505973815917969 1922
5 0 ONLINE 0.00109100341796875 0.0792160034179688 150
6 0 ONLINE 0.0215988159179688 0.260917663574219 1506
7 0 ONLINE 0.0372238159179688 0.287223815917969 1655
8 0 ONLINE 0.00402069091796875 0.258903503417969 1369
9 0 ONLINE 0.0225753784179688 0.259941101074219 1473
10 0 ONLINE 0.0342941284179688 0.258903503417969 1690
11 0 ONLINE 0.00890350341796875 0.263786315917969 1549
12 rows selected
SQL> alter system set undo_tablespace=undotbs2 scope=both;
System altered
检查UNDO Segment状态
SQL> select usn,xacts,status,rssize/1024/1024/1024,hwmsize/1024/1024/1024,shrinks
2 from v$rollstat order by USN;
USN XACTS STATUS RSSIZE/1024/1024/1024 HWMSIZE/1024/1024/1024 SHRINKS
---------- ---------- --------------- --------------------- ---------------------- ----------
0 0 ONLINE 0.00035858154296875 0.00035858154296875 0
65 0 ONLINE 0.00011444091796875 0.00011444091796875 0
66 0 ONLINE 0.00011444091796875 0.00011444091796875 0
67 0 ONLINE 0.00011444091796875 0.00011444091796875 0
68 0 ONLINE 0.00011444091796875 0.00011444091796875 0
69 0 ONLINE 0.00011444091796875 0.00011444091796875 0
70 0 ONLINE 0.00011444091796875 0.00011444091796875 0
71 0 ONLINE 0.00011444091796875 0.00011444091796875 0
72 0 ONLINE 0.00011444091796875 0.00011444091796875 0
73 0 ONLINE 0.00011444091796875 0.00011444091796875 0
74 0 ONLINE 0.00011444091796875 0.00011444091796875 0
11 rows selected
删除原UNDO表空间及数据文件
SQL> drop tablespace undotbs1 including contents and datafiles;
Tablespace dropped