SELECT sql_text
  FROM v$sqltext a, v$session b
 WHERE a.hash_value = b.sql_hash_value
   AND logon_time <= to_date(to_char(sysdate,'yyyymmddhh24mi')-10,'yyyymmddhh24mi');

SELECT ROUND(((1-(SUM(DECODE(name, 'physical reads', VALUE,0))/
(SUM(DECODE(name, 'db block gets', VALUE,0))+
(SUM(DECODE(name, 'consistent gets', VALUE, 0))))))*100),2) || '%' "Buffer Cache Hit Ratio"
FROM V$SYSSTAT;

SELECT (1-SUM (reloads)/SUM(pins))*100 "Library Cache Hit Ratio"
FROM V$LIBRARYCACHE;

SELECT (1-SUM(getmisses)/SUM(gets))*100 "Data Dictionary Hit Ratio"
FROM V$ROWCACHE;

SELECT a.tablespace_name ,
       a.total "Total(Mb)" ,
       a.total - b.free "Used(Mb)" ,
       NVL( b.free , 0 ) "Free(Mb)" ,
       ROUND(( a.total - NVL( b.free , 0 ) ) *100/total , 0 ) "Used(%)"
FROM   (
        SELECT tablespace_name ,
               ROUND(( SUM( bytes ) /1024/1024 ) , 0 ) AS total
        FROM   dba_data_files
        GROUP  BY tablespace_name
       ) a ,
       (
        SELECT tablespace_name ,
               ROUND(( SUM( bytes ) /1024/1024 ) , 0 ) AS free
        FROM   dba_free_space
        GROUP  BY tablespace_name
       ) b
WHERE  a.tablespace_name = b.tablespace_name( + )
ORDER  BY a.tablespace_name ;

SELECT * FROM v$sgastat
 
SELECT pool, SUM(bytes) "SIZE"
FROM v$sgastat
WHERE pool = 'shared pool'
GROUP BY pool

SELECT c.sql_text
,b.SID
, b.SERIAL#
,b.machine
,b.OSUSER
,b.logon_time --이 쿼리를 호출한 시간
FROM v$process a, v$session b, v$sqltext c
WHERE a.addr = b.paddr
AND b.sql_hash_value = c.hash_value
--and a.spid = '675958'
ORDER BY c.PIECE

SELECT c.sql_text
FROM v$process a, v$session b, v$sqltext c
WHERE a.addr = b.paddr
AND b.sql_hash_value = c.hash_value
AND a.spid = '171'
ORDER BY c.PIECE

SELECT c.sql_text
,b.SID
, b.SERIAL#
,b.machine
,b.OSUSER
,b.logon_time --이 쿼리를 호출한 시간
FROM v$process a, v$session b, v$sqltext c
WHERE a.addr = b.paddr
AND b.sql_hash_value = c.hash_value
AND a.spid = '1708032' --1912870/
ORDER BY c.PIECE

ALTER SYSTEM KILL SESSION '8,4093'

SELECT COUNT(*) FROM v$session WHERE machine ='머신이름' AND schemaname ='스키마이름'

SELECT sid, COUNT(sid) cursor
FROM V$OPEN_CURSOR
WHERE user_name = 'ilips'
GROUP BY sid
ORDER BY cursor DESC
 
SELECT sql_text, COUNT(sid) cnt
FROM v$OPEN_CURSOR
GROUP BY sql_text
ORDER BY cnt DESC
 
SELECT * FROM v$session_wait
 
SELECT sid, serial#, username, taddr, used_ublk, used_urec
FROM v$transaction t, v$session s
WHERE t.addr = s.taddr;
 
SELECT *  FROM sys.v_$open_cursor

SELECT s.username, s.sid, s.serial#, s.logon_time,
    DECODE(l.type, 'TM', 'TABLE LOCK',
      'TX', 'ROW LOCK',
       NULL) "LOCK LEVEL",
    o.owner, o.object_name, o.object_type
FROM v$session s, v$lock l, dba_objects o
WHERE s.sid = l.sid
AND o.object_id = l.id1
AND s.username IS NOT NULL

SELECT a.sid, a.serial#,a.username,a.process,b.object_name,
decode(c.lmode,2,'RS',3,'RX',4,'S',5,'SRX',8,'X','NO') "TABLE LOCK",
decode (a.command,2,'INSERT',3,'SELECT',6,'UPDATE',7,'DELETE',12,'DROP TABLE',26,'LOCK TABLE','UNknown') "SQL",
decode(a.lockwait, NULL,'NO wait','Wait') "STATUS"
FROM v$session a,dba_objects b, v$lock c
WHERE a.sid=c.sid AND b.object_id=c.id1
AND c.type='TM'

SELECT a.sid, a.serial#, b.type, c.object_name, a.program, a.lockwait,
       a.logon_time, a.process, a.osuser, a.terminal
FROM v$session a, v$lock b, dba_objects c
WHERE a.sid = b.sid
  AND b.id1 = c.object_id
  AND b.type = 'TM';
SELECT a.sid, a.serial#, a.username, a.process, b.object_name
FROM v$session a , dba_objects b, v$lock c
WHERE a.sid=c.sid AND b.object_id = c.id1
AND c.type = 'TM'

 # kill -9 프로세스아이디 

SELECT substr(s.username,1,11) "ORACLE USER", p.pid "PROCESS ID",
s.sid "SESSION ID", s.serial#, osuser "OS USER",
p.spid "PROC SPID",s.process "SESS SPID", s.lockwait "LOCK WAIT"
FROM v$process p, v$session s, v$access a
WHERE a.sid=s.sid AND
p.addr=s.paddr AND
s.username != 'SYS'

위 쿼리문의 결과가 있다면 락이 걸린 세션이 있다는것이므로 아래의 쿼리문으로 세션을 죽인다.

ALTER SYSTEM KILL SESSION '11,39061'