查看表空间

查看表空间
select b.file_name 物理文件名,
       b.tablespace_name 表空间,
       b.bytes / 1024 / 1024 大小M,
       (b.bytes - sum(nvl(a.bytes, 0))) / 1024 / 1024 已使用M,
       substr((b.bytes - sum(nvl(a.bytes, 0))) / (b.bytes) * 100, 1, 5) 利用率
  from dba_free_space a, dba_data_files b
where a.file_id = b.file_id
group by b.tablespace_name, b.file_name, b.bytes
order by b.tablespace_name;


更改表空间大小
alter database datafile '/ora/oradata/radius/undo.dbf' resize 10240m；


3. 查看被锁的表
SELECT p.spid, a.serial#, c.object_name, b.session_id, b.oracle_username,
       b.os_user_name
  FROM v$process p, v$session a, v$locked_object b, all_objects c
WHERE p.addr = a.paddr AND a.process = b.process
       AND c.object_id = b.object_id
      

4. 查看是哪个进程锁的
SELECT sid, serial#, username, osuser FROM v$session  where osuser = ‘dsdb'


5. 杀掉这个进程  alter system kill session 'sid,serial#';