Tablespace read only fails

Question

Hi,
10gR2 on Solaris10
There is a data  tablespace  that resists turning it into read only tablespace.
How to find what session is holding locks on objects within that tablespace?
Thx,

Answer 1

There are some attempt here:
select bl.INST_ID, bl.sid, bl.TYPE, bl.LMODE,bl.REQUEST,s.USERNAME
from GV$GLOBAL_BLOCKED_LOCKS bl, gv$session s
where bl.INST_ID=s.INST_ID and bl.SID=s.sid;
INST_ID   SID TY      LMODE    REQUEST USERNAME
         3   186 PS          4          6 USERWEB1
         3   376 PS          4          0 USERWEB1
select o.name object_name, u.name owner, lid.*
  from (select
  2    3                 s.inst_id, s.sid, s.serial#, p.spid,nvl (s.sql_id, 0), s.sql_hash_value,
  4                 decode (l.type,
  5                         'tm', l.id1,
  6                         'tx', decode (l.request,
  7                                       0, nvl (lo.object_id, -1),
  8                                       s.row_wait_obj#
                       -1
  9   10   11                        ) as object_id,
12                   l.type lock_type,
13                 DECODE (l.lmode,
14                         0, 'NONE',
15                         1, 'NULL',
16                         2, 'ROW SHARE',
                       3, 'ROW EXCLUSIVE',
17   18                         4, 'SHARE',
19                         5, 'SHARE ROW EXCLUSIVE',
20                         6, 'EXCLUSIVE',
21   22                        ) mode_held,
               DECODE (l.request,
23   24                         0, 'NONE',
25                         1, 'NULL',
26                         2, 'ROW SHARE',
27                         3, 'ROW EXCLUSIVE',
28                         4, 'SHARE',
29                         5, 'SHARE ROW EXCLUSIVE',
30                         6, 'EXCLUSIVE',
31                         '?'
32                        ) mode_requested,
33                 l.id1, l.id2, l.ctime time_in_mode,s.row_wait_obj#, s.row_wait_block#,
34                 s.row_wait_row#, s.row_wait_file#
35            from gv$lock l,
36                 gv$session s,
37                 gv$process p,
38                 (select object_id, session_id, xidsqn
39                    from gv$locked_object
40                   where xidsqn > 0) lo
41           where l.inst_id = s.inst_id
           and s.inst_id = p.inst_id
42   43             and s.sid = l.sid
44             and p.addr = s.paddr
45             and l.sid = lo.session_id(+)
46             and l.id2 = lo.xidsqn(+)) lid,
47         SYS.obj$ o,
       SYS.user$ u
48   49   WHERE o.obj#(+) = lid.object_id
50   AND o.owner# = u.user#(+)
51   AND object_id <> -1;
no rows selected
SELECT username U_NAME, owner OBJ_OWNER,
  2  object_name, object_type, s.osuser,
  3  DECODE(l.block,
  4    0, 'Not Blocking',
  1, 'Blocking',
  5    6    2, 'Global') STATUS,
  7    DECODE(v.locked_mode,
  8      0, 'None',
  9      1, 'Null',
10      2, 'Row-S (SS)',
11      3, 'Row-X (SX)',
12      4, 'Share',
13      5, 'S/Row-X (SSX)',
14      6, 'Exclusive', TO_CHAR(lmode)
15    ) MODE_HELD
16  FROM gv$locked_object v, dba_objects d,
gv$lock l, gv$session s
17   18  WHERE v.object_id = d.object_id
19  AND (v.object_id = l.id1)
20  AND v.session_id = s.sid
21  ORDER BY username, session_id;
no related users or tables
SELECT SUBSTR(TO_CHAR(w.session_id),1,5) WSID, p1.spid WPID,
SUBSTR(s1.username,1,12) "WAITING User",
  2    3  SUBSTR(s1.osuser,1,8) "OS User",
  4  SUBSTR(s1.program,1,20) "WAITING Program",
  5  s1.client_info "WAITING Client",
  6  SUBSTR(TO_CHAR(h.session_id),1,5) HSID, p2.spid HPID,
  7  SUBSTR(s2.username,1,12) "HOLDING User",
  8  SUBSTR(s2.osuser,1,8) "OS User",
  9  SUBSTR(s2.program,1,20) "HOLDING Program",
10  s2.client_info "HOLDING Client",
11  o.object_name "HOLDING Object"
12  FROM gv$process p1, gv$process p2, gv$session s1,
13  gv$session s2, dba_locks w, dba_locks h, dba_objects o
14  WHERE w.last_convert > 60
15  AND h.mode_held != 'None'
16  AND h.mode_held != 'Null'
17  AND w.mode_requested != 'None'
18  AND s1.row_wait_obj# = o.object_id
19  AND w.lock_type(+) = h.lock_type
20  AND w.lock_id1(+) = h.lock_id1
21  AND w.lock_id2 = h.lock_id2
22  AND w.session_id = s1.sid
23  AND h.session_id = s2.sid
24  AND s1.paddr = p1.addr
25  AND s2.paddr = p2.addr
26  ORDER BY w.last_convert DESC;
no related objects