Oracle维护常用SQL语句(转贴)

1、查看表空间的名称及大小

  select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size 

  from dba_tablespaces t, dba_data_files d 

  where t.tablespace_name = d.tablespace_name 

  group by t.tablespace_name; 
   

  2、查看表空间物理文件的名称及大小 

  select tablespace_name, file_id, file_name, 

  round(bytes/(1024*1024),0) total_space 

  from dba_data_files 

  order by tablespace_name; 

   

  3、查看回滚段名称及大小 

  select segment_name, tablespace_name, r.status, 

  (initial_extent/1024) InitialExtent,(next_extent/1024) NextExtent, 

  max_extents, v.curext CurExtent 

  From dba_rollback_segs r, v$rollstat v 

  Where r.segment_id = v.usn(+) 

  order by segment_name ; 

   

  4、查看控制文件 

  select name from v$controlfile; 

   

  5、查看日志文件 

  select member from v$logfile; 

   

  6、查看表空间的使用情况 

  select sum(bytes)/(1024*1024) as free_space,tablespace_name 

  from dba_free_space 

  group by tablespace_name; 

   

  SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE, 

  (B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE" 

  FROM SYS.SM$TS_AVAIL A,SYS.SM$TS_USED B,SYS.SM$TS_FREE C 

  WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME; 

   

  7、查看数据库库对象 

  select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status; 

   

  8、查看数据库的版本  

  Select version FROM Product_component_version 

  Where SUBSTR(PRODUCT,1,6)='Oracle'; 


   9、查看数据库的创建日期和归档方式  

  Select Created, Log_Mode, Log_Mode From V$Database; 

   

   10、捕捉运行很久的SQL 

  column username format a12 

  column opname format a16 

  column progress format a8 

   

  select username,sid,opname, 

  round(sofar*100 / totalwork,0)    '%' as progress, 

  time_remaining,sql_text 

  from v$session_longops , v$sql 

  where time_remaining <> 0 

  and sql_address = address 

  and sql_hash_value = hash_value 

  / 

   

   11、查看数据表的参数信息  

  SELECT partition_name, high_value, high_value_length, tablespace_name, 

  pct_free, pct_used, ini_trans, max_trans, initial_extent, 

  next_extent, min_extent, max_extent, pct_increase, FREELISTS, 

  freelist_groups, LOGGING, BUFFER_POOL, num_rows, blocks, 

  empty_blocks, avg_space, chain_cnt, avg_row_len, sample_size, 

  last_analyzed 

  FROM dba_tab_partitions 

  --WHERE table_name = :tname AND table_owner = :towner 

  ORDER BY partition_position 

   

   12、查看还没提交的事务 

  select * from v$locked_object; 

  select * from v$transaction; 

   

   13、查找object为哪些进程所用  

  select 

  p.spid, 

  s.sid, 

  s.serial# serial_num, 

  s.username user_name, 

  a.type object_type, 

  s.osuser os_user_name, 

  a.owner, 

  a.object object_name, 

  decode(sign(48 - command), 

  1, 

  to_char(command), 'Action Code #'    to_char(command) ) action, 

  p.program oracle_process, 

  s.terminal terminal, 

  s.program program, 

  s.status session_status 

  from v$session s, v$access a, v$process p 

  where s.paddr = p.addr and 

  s.type = 'USER' and 

  a.sid = s.sid and 

  a.object='SUBSCRIBER_ATTR' 

  order by s.username, s.osuser 
   

   14、回滚段查看 

  select rownum, sys.dba_rollback_segs.segment_name Name, v$rollstat.extents 

  Extents, v$rollstat.rssize Size_in_Bytes, v$rollstat.xacts XActs, 

  v$rollstat.gets Gets, v$rollstat.waits Waits, v$rollstat.writes Writes, 

  sys.dba_rollback_segs.status status from v$rollstat, sys.dba_rollback_segs, 

  v$rollname where v$rollname.name(+) = sys.dba_rollback_segs.segment_name and 

  v$rollstat.usn (+) = v$rollname.usn order by rownum 

   

   15、耗资源的进程(top session)  

  select s.schemaname schema_name, decode(sign(48 - command), 1, 

  to_char(command), 'Action Code #'    to_char(command) ) action, status 

  session_status, s.osuser os_user_name, s.sid, p.spid , s.serial# serial_num, 

  nvl(s.username, '[Oracle process]') user_name, s.terminal terminal, 

  s.program program, st.value criteria_value from v$sesstat st, v$session s , v$processp

  where st.sid = s.sid and st.statistic# = to_number('38') and ('ALL' = 'ALL' 

  or s.status = 'ALL') and p.addr = s.paddr order by st.value desc, p.spid asc, s.username asc, s.osuser asc


from: http://www.net130.com/2004/9-13/162941.html



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