[置顶] Oracle实时运维常用查询语句

本篇文章给出Oracle数据库运维时常用的查询语句：

1. 查询数据库的参数与属性：

SELECT * FROM database_properties;
SELECT * FROM v$version;

2.查询当前运行的数据库SESSION和SID：

SELECT sid,
  serial#
FROM v$session
WHERE audsid=sys_context('USERENV','SESSIONID');

3. 查询指定SID对应的操作系统进程ID：

SELECT p.spid "OS Thread" ,
  b.name "Name User" ,
  s.program ,
  s.sid ,
  s.serial# ,
  s.osuser ,
  s.machine
FROM v$process p,
  v$session s,
  v$bgprocess b
WHERE p.addr=s.paddr
AND p.addr  =b.paddr
AND (s.sid  =
  &1
OR p.spid=
  &1)
UNION ALL
SELECT p.spid "OS Thread" ,
  s.username "Name User" ,
  s.program ,
  s.sid ,
  s.serial# ,
  s.osuser ,
  s.machine
FROM v$process p,
  v$session s
WHERE p.addr=s.paddr
AND (s.sid  =
  &1
OR p.spid=
  &1)
AND s.username IS NOT NULL;

4.根据SID获取sql语句：

SELECT
  /*+ PUSH_SUBQ */
  command_type ,
  sql_text ,
  sharable_mem ,
  persistent_mem ,
  runtime_mem ,
  sorts ,
  version_count ,
  loaded_version ,
  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=&sid
  );

5.查询某个数据库SESSION使用了指定的数据库对象：

SELECT p.spid ,
  s.sid ,
  s.serial# ,
  s.username ,
  a.type ,
  s.osuser ,
  a.owner ,
  a.object ,
  DECODE(SIGN(48-command),1,TO_CHAR(command),'Action Code #'
  ||TO_CHAR(command)) Action ,
  p.program ,
  s.terminal ,
  s.program ,
  s.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='&obj'
ORDER BY s.username,
  s.osuser;

6.查询当前那些用户正在使用数据库：

SELECT s.osuser ,
  DECODE(SIGN(48-command),1,TO_CHAR(command),'Action Code #'
  ||TO_CHAR(command)) Action ,
  p.program "oracle process" ,
  status "session status" ,
  s.terminal ,
  s.program ,
  s.username ,
  s.fixed_table_sequence "Activity Meter" ,
  '' Query ,
  0 Memory ,
  0 "Max Memory" ,
  0 "CPU Usage" ,
  s.sid ,
  s.serial#
FROM v$session s,
  v$process p
WHERE s.paddr=p.addr
AND s.type   ='USER'
ORDER BY s.username,
  s.osuser;

7.查询消耗数据库资源前10的数据库SESSION：

SELECT s.schemaname "Schema Name" ,
  DECODE(SIGN(48-command),1,'Action Code #'
  ||TO_CHAR(command)) Action ,
  status "Session Status" ,
  s.osuser "OS User Name" ,
  s.sid ,
  p.spid ,
  s.serial# ,
  NVL(s.username,'[Oracle Process]') "User Name" ,
  s.terminal ,
  s.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
AND s.schemaname ='DM_DWH'
ORDER BY st.value DESC,
  p.spid ASC,
  s.username ASC,
  s.osuser ASC;

8.查询数据库的被锁对象：

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 enqueu 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,'Exlusive') LOCK_MODE ,
  o.owner ,
  ls.sid ,
  ls.serial# ,
  ls.id1 ,
  ls.id2
FROM 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;