Re: Blocker did not identified

Thansk Gogala for the answer.

I think this link : https://github.com/dombrooks/Oracle-Monitoring-Scripts/ blob/master/transactions.sql sent by Dominic can help on the next time that it occurs.

Thanks
Eriovaldo

2017-12-31 9:49 GMT-02:00 Mladen Gogala <gogala.mladen_at_gmail.com>:

> 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$transactions ..
>
> Regards
> Eriovaldo
>
>
> 2017-12-30 9:22 GMT-02:00 Dominic Brooks <dombrooks_at_hotmail.com>:
>
>> Also... technically it’s transactions not sessions which hold locks. In
>> some niche circumstances, that can make a difference in how to identify.
>>
>> Sent from my iPhone
>>
>> On 30 Dec 2017, at 11:02, Niall Litchfield <niall.litchfield_at_gmail.com>
>> wrote:
>>
>> Is this a RAC database? You'll need to look also at the instance and
>> blocking_status columns in v$session to rely on the blocking_session column
>> in v$session. https://docs.oracle.com/database/121/REFRN/GUID-
>> 28E2DC75-E157-4C0A-94AB-117C205789B9.htm#REFRN30223
>> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.oracle.com%2Fdatabase%2F121%2FREFRN%2FGUID-28E2DC75-E157-4C0A-94AB-117C205789B9.htm%23REFRN30223&data=02%7C01%7C%7Ce5abce7a2d1649633ac408d54f74d750%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636502285600939613&sdata=YN6Yr5ej5RLhXTthDuzXIHv%2BTq2KGXX%2FFTJsFT93Rjc%3D&reserved=0>
>> IIRC EM12c also is not RAC aware in its blocking sessions page.
>>
>> On Sat, Dec 30, 2017 at 3:07 AM, Eriovaldo Andrietta <
>> ecandrietta_at_gmail.com> wrote:
>>
>>> ​​​Hello,
>>>
>>> I got an issue related to lock.
>>> Now the daabase was re-started and the issue is solved.
>>> But during investigation I did not get sucess to identify who were
>>> locking a table.
>>>
>>> A table is used like this:
>>>
>>> SELECT ID FROM TABLE_BLA
>>> where id = :1
>>> for upate;
>>>
>>> The query did not return the result and looking for lock using this
>>> query :
>>>
>>> select s.sid, s.blocking_session, do.object_name,
>>> row_wait_obj#, row_wait_file#, row_wait_block#, row_wait_row#,
>>> dbms_rowid.rowid_create ( 1, ROW_WAIT_OBJ#, ROW_WAIT_FILE#,
>>> ROW_WAIT_BLOCK#, ROW_WAIT_ROW# )
>>> from v$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
>> <https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.orawin.info&data=02%7C01%7C%7Ce5abce7a2d1649633ac408d54f74d750%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636502285600939613&sdata=mftmtNck9%2B16o4DQ2s0i3IDbgJgmSbOyXrzJtazs5B4%3D&reserved=0>
>>
>>
>
> --
> Mladen Gogala
> Oracle DBAhttp://mgogala.freehostia.com
>
>

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