any script to find which user locking other user

Lock's &Latches

do you have script wich already written which will list the sid beoing locked and owner of the objects and locking user

SELECT username U_NAME, owner OBJ_OWNER,
object_name, object_type, s.osuser,
DECODE(l.block,
  0, 'Not Blocking',
  1, 'Blocking',
  2, 'Global') STATUS,
  DECODE(v.locked_mode,
    0, 'None',
    1, 'Null',
    2, 'Row-S (SS)',
    3, 'Row-X (SX)',
    4, 'Share',
    5, 'S/Row-X (SSX)',
    6, 'Exclusive', TO_CHAR(lmode)
  ) MODE_HELD
FROM gv$locked_object v, dba_objects d,
gv$lock l, gv$session s
WHERE v.object_id = d.object_id
AND (v.object_id = l.id1)
AND v.session_id = s.sid
ORDER BY username, session_id;

does it look good

Did you check out the script I posted?

Or look for another one here.

Sorry, thought it would be obvious to look in the "Database Performance" section.
Also I found an OLD script that was provided by Oracle (attached).
db-locks.sql

wow, 1989, that is old!

My script is from the last millineum too but not quite that old and has been updated with new syntax and features several times since then.


based on the naming similarities I'm going to guess my original inspiration was the script you posted.  I could never remember why I called that WITH (which I originally wrote as an inline view) "lock_holders"  that always seemed to me like an inadequate name.

Excuse me: utllockt.sql,v 1.2 1995/05/05 10:16:23
Modified for Oracle version 7!

I was referring to the creation date.  utllockt has been updated a few more times since 95.  Just check $ORACLE_HOME/rdbms/admin in your most recent installation.

It's the same basic structure though,  that's why I wrote my own.  I wanted something I could run where I didn't have authority to create new tables.  Plus, it always seemed like a wasted step anyway.  And I needed a RAC aware, or actually an OPS-aware version, back then and utllockt doesn't cover that.

can we identify based on history views like active session history

and one more time is the script iam using cooorect.

SELECT username U_NAME, owner OBJ_OWNER,
object_name, object_type, s.osuser,
DECODE(l.block,
  0, 'Not Blocking',
  1, 'Blocking',
  2, 'Global') STATUS,
  DECODE(v.locked_mode,
    0, 'None',
    1, 'Null',
    2, 'Row-S (SS)',
    3, 'Row-X (SX)',
    4, 'Share',
    5, 'S/Row-X (SSX)',
    6, 'Exclusive', TO_CHAR(lmode)
  ) MODE_HELD
FROM gv$locked_object v, dba_objects d,
gv$lock l, gv$session s
WHERE v.object_id = d.object_id
AND (v.object_id = l.id1)
AND v.session_id = s.sid
ORDER BY username, session_id;

U_NAME  OBJ_OWNER  OBJECT_NAME      OBJECT_TYPE   STATUS MODE_HELD

SCHEMAB SchemaA    SCHEMA"A" object    TABLE  Row-X (SX)
schemab doesnot have any eread write privs on shema how come my above query shows schemb is locking schema A

does AND v.session_id = s.sid  causing any confusion ?because in RAC  it may have same session sid on multiple nodes

sdstuber: does your script has to run all nodes?


and my out put is

 670
         1      19211 ACTIVE   enq: TM - contention                                             ORA_MON - oracle - server           ORA_MON.X                                                                                                                                                        AAAd0OAAAAAAAAAAAA
 lock table X in EXCLUSIVE mode

>>> sdstuber: does your script has to run all nodes?

no, you run it on one, but the gv$ views query the other nodes for you.  That's how it detects if session on nodeA is blocking a session on nodeB


that output doesn't look something any query in this thread would have produced.  That might be due to the formatting by putting it in the text box or maybe you missed some output in a cut-and-paste