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Oracle维护常用SQL语句

原创 Oracle 作者:hljhrbsjf 时间:2006-06-06 14:18:53 0 删除 编辑

1、查看表空间的名称及大小

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$process p

  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

  16、查看锁(lock)情况

  select /*+ RULE */ ls.osuser os_user_name, ls.username user_name,

  decode(ls.type, 'RW', 'Row wait enqueue lock', 'TM', 'DML enqueue lock', 'TX',

  'Transaction enqueue lock', 'UL', 'User supplied lock') lock_type,

  o.object_name object, decode(ls.lmode, 1, null, 2, 'Row Share', 3,

  'Row Exclusive', 4, 'Share', 5, 'Share Row Exclusive', 6, 'Exclusive', null)

  lock_mode, o.owner, ls.sid, ls.serial# serial_num, ls.id1, ls.id2

  from sys.dba_objects o, ( select s.osuser, s.username, l.type,

  l.lmode, s.sid, s.serial#, l.id1, l.id2 from v$session s,

  v$lock l where s.sid = l.sid ) ls where o.object_id = ls.id1 and o.owner

  <> 'SYS' order by o.owner, o.object_name

  17、查看等待(wait)情况

  SELECT v$waitstat.class, v$waitstat.count count, SUM(v$sysstat.value) sum_value

  FROM v$waitstat, v$sysstat WHERE v$sysstat.name IN ('db block gets',

  'consistent gets') group by v$waitstat.class, v$waitstat.count

  18、查看sga情况

  SELECT NAME, BYTES FROM SYS.V_$SGASTAT ORDER BY NAME ASC

  19、查看catched object

  SELECT owner, name, db_link, namespace,

  type, sharable_mem, loads, executions,

  locks, pins, kept FROM v$db_object_cache

  20、查看V$SQLAREA

  SELECT SQL_TEXT, SHARABLE_MEM, PERSISTENT_MEM, RUNTIME_MEM, SORTS,

  VERSION_COUNT, LOADED_VERSIONS, OPEN_VERSIONS, USERS_OPENING, EXECUTIONS,

  USERS_EXECUTING, LOADS, FIRST_LOAD_TIME, INVALIDATIONS, PARSE_CALLS, DISK_READS,

  BUFFER_GETS, ROWS_PROCESSED FROM V$SQLAREA

  21、查看object分类数量

  select decode (o.type#,1,'INDEX' , 2,'TABLE' , 3 , 'CLUSTER' , 4, 'VIEW' , 5 ,

  'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) object_type , count(*) quantity from

  sys.obj$ o where o.type# > 1 group by decode (o.type#,1,'INDEX' , 2,'TABLE' , 3

  , 'CLUSTER' , 4, 'VIEW' , 5 , 'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) union select

  'COLUMN' , count(*) from sys.col$ union select 'DB LINK' , count(*) from

  22、按用户查看object种类

  select u.name schema, sum(decode(o.type#, 1, 1, NULL)) indexes,

  sum(decode(o.type#, 2, 1, NULL)) tables, sum(decode(o.type#, 3, 1, NULL))

  clusters, sum(decode(o.type#, 4, 1, NULL)) views, sum(decode(o.type#, 5, 1,

  NULL)) synonyms, sum(decode(o.type#, 6, 1, NULL)) sequences,

  sum(decode(o.type#, 1, NULL, 2, NULL, 3, NULL, 4, NULL, 5, NULL, 6, NULL, 1))

  others from sys.obj$ o, sys.user$ u where o.type# >= 1 and u.user# =

  o.owner# and u.name <> 'PUBLIC' group by u.name order by

  sys.link$ union select 'CONSTRAINT' , count(*) from sys.con$

  23、有关connection的相关信息

  1)查看有哪些用户连接

  select s.osuser os_user_name, decode(sign(48 - command), 1, to_char(command),

  'Action Code #' || to_char(command) ) action, p.program oracle_process,

  status session_status, s.terminal terminal, s.program program,

  s.username user_name, s.fixed_table_sequence activity_meter, '' query,

  0 memory, 0 max_memory, 0 cpu_usage, s.sid, s.serial# serial_num

  from v$session s, v$process p where s.paddr=p.addr and s.type = 'USER'

  order by s.username, s.osuser

  2)根据v.sid查看对应连接的资源占用等情况

  select n.name,

  v.value,

  n.class,

  n.statistic#

  from v$statname n,

  v$sesstat v

  where v.sid = 71 and

  v.statistic# = n.statistic#

  order by n.class, n.statistic#

  3)根据sid查看对应连接正在运行的sql

  select /*+ PUSH_SUBQ */

  command_type,

  sql_text,

  sharable_mem,

  persistent_mem,

  runtime_mem,

  sorts,

  version_count,

  loaded_versions,

  open_versions,

  users_opening,

  executions,

  users_executing,

  loads,

  first_load_time,

  invalidations,

  parse_calls,

  disk_reads,

  buffer_gets,

  rows_processed,

  sysdate start_time,

  sysdate finish_time,

  '>' || address sql_address,

  'N' status

  from v$sqlarea

  where address = (select sql_address from v$session where sid = 71)

  24、查询表空间使用情况select a.tablespace_name "表空间名称",

  100-round((nvl(b.bytes_free,0)/a.bytes_alloc)*100,2) "占用率(%)",

  round(a.bytes_alloc/1024/1024,2) "容量(M)",

  round(nvl(b.bytes_free,0)/1024/1024,2) "空闲(M)",

  round((a.bytes_alloc-nvl(b.bytes_free,0))/1024/1024,2) "使用(M)",

  Largest "最大扩展段(M)",

  to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') "采样时间"

  from (select f.tablespace_name,

  sum(f.bytes) bytes_alloc,

  sum(decode(f.autoextensible,'YES',f.maxbytes,'NO',f.bytes)) maxbytes

  from dba_data_files f

  group by tablespace_name) a,

  (select f.tablespace_name,

  sum(f.bytes) bytes_free

  from dba_free_space f

  group by tablespace_name) b,

  (select round(max(ff.length)*16/1024,2) Largest,

  ts.name tablespace_name

  from sys.fet$ ff, sys.file$ tf,sys.ts$ ts

  where ts.ts#=ff.ts# and ff.file#=tf.relfile# and ts.ts#=tf.ts#

  group by ts.name, tf.blocks) c

  where a.tablespace_name = b.tablespace_name and a.tablespace_name = c.tablespace_name

  25、 查询表空间的碎片程度

  select tablespace_name,count(tablespace_name) from dba_free_space group by tablespace_name

  having count(tablespace_name)>10;

  alter tablespace name coalesce;

  alter table name deallocate unused;

  create or replace view ts_blocks_v as

  select tablespace_name,block_id,bytes,blocks,'free space' segment_name from dba_free_space

  union all

  select tablespace_name,block_id,bytes,blocks,segment_name from dba_extents;

  select * from ts_blocks_v;

  select tablespace_name,sum(bytes),max(bytes),count(block_id) from dba_free_space

  group by tablespace_name;

  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

[@more@]

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