Thursday, 28 February 2013

Lock Query details

Lock Query details:
It provided Locking details along with more details.


PROMPT Lock Query details
col process for a15
col terminal for a25
col lmode for a20
col object for a30
set lin 1000
select s.sid, s.serial#,
       decode(s.process, null,
          decode(substr(p.username,1,1), '?',   upper(s.osuser), p.username),
          decode(       p.username, 'ORACUSR ', upper(s.osuser), s.process)
       ) process,
       nvl(s.osuser, 'SYS ('||substr(p.username,1,4)||')') username,
       decode(s.terminal, null, rtrim(p.terminal, chr(0)),
              upper(s.terminal)) terminal,
       decode(l.type, 'MR', decode(u.name, null,
                            'DICTIONARY OBJECT', u.name||'.'||o.name),
                      'TD', u.name||'.'||o.name,
                      'TM', u.name||'.'||o.name,
                      'RW', 'FILE#='||substr(l.id1,1,3)||
                      ' BLOCK#='||substr(l.id1,4,5)||' ROW='||l.id2,
                      'TX', 'RS+SLOT#'||l.id1||' WRP#'||l.id2,
                      'WL', 'REDO LOG FILE#='||l.id1,
                      'RT', 'THREAD='||l.id1,
                      'TS', decode(l.id2, 0, 'ENQUEUE','NEW BLOCK ALLOCATION'),
                      'ID1='||l.id1||' ID2='||l.id2) object,
       decode(l.type,
          -- Long locks major
                      'TM', 'DML/DATA ENQ',   'TX', 'TRANSAC ENQ',
                      'UL', 'PLS USR LOCK',
          -- Short locks minor
                      'BL', 'BUF HASH TBL',  'CF', 'CONTROL FILE',
                      'CI', 'CROSS INST F',  'DF', 'DATA FILE   ',
                      'CU', 'CURSOR BIND ',
                      'DL', 'DIRECT LOAD ',  'DM', 'MOUNT/STRTUP',
                      'DR', 'RECO LOCK   ',  'DX', 'DISTRIB TRAN',
                      'FS', 'FILE SET    ',  'IN', 'INSTANCE NUM',
                      'FI', 'SGA OPN FILE',
                      'IR', 'INSTCE RECVR',  'IS', 'GET STATE   ',
                      'IV', 'LIBCACHE INV',  'KK', 'LOG SW KICK ',
                      'LS', 'LOG SWITCH  ',
                      'MM', 'MOUNT DEF   ',  'MR', 'MEDIA RECVRY',
                      'PF', 'PWFILE ENQ  ',  'PR', 'PROCESS STRT',
                      'RT', 'REDO THREAD ',  'SC', 'SCN ENQ     ',
                      'RW', 'ROW WAIT    ',
                      'SM', 'SMON LOCK   ',  'SN', 'SEQNO INSTCE',
                      'SQ', 'SEQNO ENQ   ',  'ST', 'SPACE TRANSC',
                      'SV', 'SEQNO VALUE ',  'TA', 'GENERIC ENQ ',
                      'TD', 'DLL ENQ     ',  'TE', 'EXTEND SEG  ',
                      'TS', 'TEMP SEGMENT',  'TT', 'TEMP TABLE  ',
                      'UN', 'USER NAME   ',  'WL', 'WRITE REDO  ',
                      'TYPE='||l.type) type,
       decode(l.lmode, 0, 'NONE', 1, 'NULL', 2, 'RS', 3, 'RX',
                       4, 'S',    5, 'RSX',  6, 'X',
                       to_char(l.lmode) ) lmode,      
       decode(l.request, 0, 'NONE', 1, 'NULL', 2, 'RS', 3, 'RX',
                         4, 'S', 5, 'RSX', 6, 'X',
                         to_char(l.request) ) lrequest             
from   sys.v_$lock l, sys.v_$session s, sys.obj$ o, sys.user$ u,
       sys.v_$process p
where  s.paddr  = p.addr(+)
  and  l.sid    = s.sid
  and  l.id1    = o.obj#(+)
  and  o.owner# = u.user#(+)
  and  l.type   <> 'MR'
UNION ALL                          /*** LATCH HOLDERS SQL ***/
select s.sid, s.serial#, s.process, s.osuser, s.terminal,
       'LATCH', 'X', 'NONE', h.name||' ADDR='||rawtohex(laddr)
from   sys.v_$process p, sys.v_$session s, sys.v_$latchholder h
where  h.pid  = p.pid
  and  p.addr = s.paddr
UNION ALL                         /*** LATCH WAITERS SQL ***/
select s.sid, s.serial#, s.process, s.osuser, s.terminal,
       'LATCH', 'NONE', 'X', name||' LATCH='||p.latchwait
from   sys.v_$session s, sys.v_$process p, sys.v_$latch l
where  latchwait is not null
  and  p.addr      = s.paddr
  and  p.latchwait = l.addr
/

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