All locks are identified in V$LOCK table. You may be looking for an
event which functions as a lock, like waiting for a checkpoint to
complete, but there aren't any locks which are not identified in V$LOCK.
Regards
On 12/30/2017 05:32 PM, Eriovaldo Andrietta wrote:
Tks Dominic,
This is exactly I am looking for:
What is the way to check lock that is not identified by v$session and v$lock and v$transactions ..
Regards
Eriovaldo
2017-12-30 9:22 GMT-02:00 Dominic Brooks <dombrooks@xxxxxxxxxxx <mailto:dombrooks@xxxxxxxxxxx>>:
Also... technically it’s transactions not sessions which hold
locks. In some niche circumstances, that can make a difference in
how to identify.
Sent from my iPhone
On 30 Dec 2017, at 11:02, Niall Litchfield
<niall.litchfield@xxxxxxxxx <mailto:niall.litchfield@xxxxxxxxx>>
wrote:
Is this a RAC database? You'll need to look also at the instance
and blocking_status columns in v$session to rely on the
blocking_session column in v$session.
https://docs.oracle.com/database/121/REFRN/GUID-28E2DC75-E157-4C0A-94AB-117C205789B9.htm#REFRN30223
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IIRC EM12c also is not RAC aware in its blocking sessions page.
On Sat, Dec 30, 2017 at 3:07 AM, Eriovaldo Andrietta
<ecandrietta@xxxxxxxxx <mailto:ecandrietta@xxxxxxxxx>> wrote:
Hello,
I got an issue related to lock.
Now the daabase was re-started and the issue is solved.
But during investigation I did not get sucess to identify who
were locking a table.
A table is used like this:
SELECT ID FROM TABLE_BLA
where id = :1
for upate;
The query did not return the result and looking for lock
using this query :
select s.sid, s.blocking_session, do.object_name,
row_wait_obj#, row_wait_file#, row_wait_block#,
row_wait_row#,
dbms_rowid.rowid_create ( 1, ROW_WAIT_OBJ#,
ROW_WAIT_FILE#, ROW_WAIT_BLOCK#, ROW_WAIT_ROW# )
from v$session s, dba_objects do
where s.ROW_WAIT_OBJ# = do.OBJECT_ID
I saw the row_wait_obj#, ROW_WAIT_FILE#, ROW_WAIT_BLOCK# and
ROW_WAIT_ROW# values.
In this situation how can I find the blocker?
or
I used a lot of queries that show blocker and locked but
without sucess to see the blocker.
Regards
Eriovaldo
-- Niall Litchfield
Oracle DBA
http://www.orawin.info
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