Dead Locks - Not Releasing?
Oct 8, 2012We have encountered dead locks in EBS R12 Database 10.2.0.3. Even after bouncing the appstier and dbtier completely does not release the locks. How to clear the locks?
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Rowlevel Dead Lock
Aug 19, 2011In my trace file am getting the following error, I understand this is due to the row level deadlock between two sessions accessing the same rows in a table.
*** 2011-08-17 20:22:27.969
DEADLOCK DETECTED ( ORA-00060 )
[Transaction Deadlock]
The following deadlock is not an ORACLE error. It is a deadlock due to user error in the design of an application or from issuing incorrect ad-hoc SQL. The following information may aid in determining the deadlock:
Deadlock graph:
---------Blocker(s)-------- ---------Waiter(s)---------
Resource Name process session holds waits process session holds waits
TX-016e0017-0001e10f 75 2370 X 153 2269 X
TX-0217000f-00009247 153 2269 X 75 2370 X
session 2370: DID 0001-004B-0015DCCEsession 2269: DID 0001-0099-000FB698
session 2269: DID 0001-0099-000FB698session 2370: DID 0001-004B-0015DCCE
Rows waited on:
Session 2370: obj - rowid = 000329C9 - AAAynJAAIAAEkVIAAG
(dictionary objn - 207305, file - 8, block - 1197384, slot - 6)
Session 2269: obj - rowid = 000329F2 - AAAynyAARAAEhMBAAA
(dictionary objn - 207346, file - 17, block - 1184513, slot - 0)
----- Information for the OTHER waiting sessions -----
Session 2269:
sid: 2269 ser: 36409 audsid: 563917587 user: 107/PICKLE flags: 0x8000041
pid: 153 O/S info: user: oracle, term: UNKNOWN, ospid: 27324
image: oracle@snokhup4000
client details:
O/S info: user: appsrv, term: , ospid: 1234
machine: snokhup255 program:
current SQL:
DELETE FROM moderation_queue WHERE parent_id =:1 AND submission_type =:2 AND site_id IN ( select site_id from sites where personna_id= 1 )
----- End of information for the OTHER waiting sessions -----
Information for THIS session:
----- Current SQL Statement for this session (sql_id=5rywrxc0mpcc1) -----
delete from shadow_users where user_id=:1 and personna_id=:2
--------------------------------------------------------------------------------
how to overcome or avoid the rowlevel deadlock.
Temporary Tablespace Not Releasing Space?
Jul 13, 2013We have EBS database with version 11.1.0.7 . Our tablespace is not releasing space ,as the below query show that TEM2 is using only 3 g .
SELECT A.tablespace_name tablespace, D.mb_total, SUM (A.used_blocks * D.block_size) / 1024 / 1024 mb_used, D.mb_total - SUM (A.used_blocks * D.block_size) / 1024 / 1024 mb_freeFROM v$sort_segment A, ( SELECT B.name, C.block_size, SUM (C.bytes) / 1024 / 1024 mb_total FROM v$tablespace B, v$tempfile C WHERE B.ts#= C.ts# GROUP BY B.name, C.block_size ) DWHERE A.tablespace_name = D.nameGROUP by A.tablespace_name,
[Code]....
Server Administration :: RBS Tablespace Is Not Releasing Space
Aug 27, 2012In My database rollback segment space is not releasing space even though, there is no transaction is using RBS. RBS tablespace size is around 70GB. Unfortunately still our environment is running in 9i due to application code
SQL> show parameter undo
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
undo_management string MANUAL
undo_retention integer 1800
undo_suppress_errors boolean FALSE
undo_tablespace
Locks On Partition Table?
May 13, 2011I have the below questions on the locking mechanism in a partition table. Example I execute the below query,
delete from table_name subpartition (subpartition_name);
In that case,
1. If we perform above query, then which level of lock is happened to the table/partition & sub-partitions?
2. If we perform above query on same sub-partition of the same table with different where clause, what will happen?
3. If we perform above query for same table but different sub partition at same time, what will happen?
How To Check Locks In Database
Apr 13, 2013oracleDatabase version:11gR2
Os:solaris
how to check locks on database objects .it might be any lock? any select sql query to check database object levlel locks?what basis locks will occur?
SQL & PL/SQL :: DB Locks And Data Corruption?
Feb 25, 2012I have a sql script where triggers, procedures and functions are written. The triggers are causing db outages and causing problems in the application as well.
I am trying my best but with my low experience and expertise, am not able to make good progress.
Scenario: Course enrollments are inserted, deleted and updated in course_main and course_users table. This is done in gui as well as in background snapshot scheduler in a cron process. Course_main table contains all course enrollments and course_users table has crsmain_pk1 as foreign key.
Its quite a big file and am not sure what should i paste here so am uploading the file in txt.
Table Locks In Exclusive Mode
Jan 6, 2011Under what scenarios do we lock a table in the exclusive mode.
View 1 Replies View RelatedUnexplainable Exclusive Transaction Locks?
Aug 23, 2010I have a job which runs the procedure below concurrently in 4 different sessions; It updates two tables.
PROCEDURE UPDATE_TAB_1_AND_TAB_2( traceIdTab IN pl_sql table,
individualIdTab IN pl_sql table,
fileSeqIdTab IN pl_sql table,
[Code].....
Each session is passed a sequence generated file ID; so the records processed in each session are completely different.
However, everytime this job runs, without failure, ONLY TWO sessions process concurrently, while the other two sessions are blocked. Once the first two have finished, then the remaining two sessions start work.
I have being monitoring the sessions on each run daily, and realized that the first two sessions processing are each holding a transaction exclusive lock on objects; hence blocking the other two sessions.
When I tried to find the objects that the two running sessions have a lock on, I cant seem to find anything by searching DBA_OBJECTS.object_id. However, when I look for the objects that are being waited on, its either a partitioned table or a partitioned index on either table_1 or table_2.
At first, I thought it was an ITL lock and after much analysis, I did not find anything which definitely pointed to an ITL lock. However, just to make sure, I increased the INITTRANS value from 2 to 5, but the problem did not go away.
At this point, I have applied all I know to understand the origin of the TX lock and how I can work around this situation, and decided to ask higher powers in Oracle for advise.
How To Analyze Locks And Performance Of Database
Sep 6, 2010I used v$locked_object and v$lock query to get the output.. But still I'm an one year exp in ORACLE. How to analyze the output of lock queries. what are the parameters to be analyzed on AWR report.
How to do proper performance checkup in ORACLE database as well analyze it.
Library Cache Locks By Dynamic DDL
Jun 30, 2011At a customers site I see lot of long lasting library cache locks during a complex ETL run. Several Sessions run in parallel and create Database tables with dynamic sql ( CREATE TABLE AS SELECT ....) .
Sometimes these procedures wait for each other with wait event 'Library Cache' . I presume that this is a side effect of the dynamic DDL in the stored procedures. Is that possible even when the Procs create different Tables but reference the same tables in their SELECT clauses ?
I presume that this is plausible but I need some arguments to convince my colleagues.
SQL & PL/SQL :: Session Is Killed But Locks Not Released
Jun 8, 2011On DB123, I have 2 KILLED sessions which are not disappearing and are holding locks on some tables in ONE schema.
The sessions belonged to ETL process and I have killed them last Friday after they have been hanging for 3 days. Unfortunately, I've also killed the corresponding Unix session - and now I've read on the Internet that in those cases the KILLED sessions might be hanging forever (=until the DB is shutdown).
how to remove these locks.
Performance Tuning :: How To Reduce Dml Locks
May 24, 2012After ran db health check, my database report gives the following details
dml_locks OK. dml_locks = 3396, transactions = 849.
Server Administration :: How To Avoid Blocking Locks
Nov 8, 2011how to avoid blocking locks.
View 27 Replies View RelatedScript To Find Blocking Locks More Than 30 Minutes
Jun 29, 2012writing a script where there is a blocking lock for more than 30 minutes ?
View 2 Replies View RelatedPL/SQL :: How To View The Number Of Locks Defined For A Database
Aug 21, 2012How to view the number of locks defined for a database? I am using Oracle 10g.
How to calculate the number of locks for a given sql select statement?
say for example,
select a.eno,b.ename,c.salary,d.dob,e.address
from a,b,c,d,e
where...
...
..
Assume all of them are row level locking.
I want to calculate the number of locks . How many locks will be held while running the above query?
Networking And Gateways :: Select For Update - How To Kill Old Locks
Aug 3, 2011My code executes a Select For Update before updating a table. In some cases the network is disconnected and it causes the lock to hang. Then, I must kill the session in order to realese this lock.
I want to do it automatically. I would like to create a job that kills session that has a lock due to Select For Update that is not alive.
Forms :: Alert Windows Appear To Be Hidden And Application Locks Up
May 6, 2011I have a forms 11g application that of course has several message and alert windows that pop up when various errors or messages need to be displayed. This all works great on the developer machine, but when I try and run the form on another machine using any browser the message and alert windows appear to be hidden and the application locks up with the rolling bar across the bottom. I would guess it is waiting for a response, but I cannot get the window to appear.
Following is an example of an alert to be displayed:
declare
vAlertButton number;
begin
vAlertButton := show_alert('NO_EMAIL');
end;
RAC & Failsafe :: Inserting Large Data Locks The Destination Table In RAC
Oct 18, 2010Scenario:
Our application is using a two instance, one for the live active data and the other for the reports data. We have a process which moves the data from the live instance to reports instance every night. In a single db environment the process is working without any issues. However when we move to the RAC environment the reports db's (insert) in large table get locked and we are unable to insert data to the reports db.
What we are performing is:
Insert into my_table_rpt select * from may_table_live@db_link_to_livedb;
Issues:
my_table_rpt get locked
We have found the workaround by disable locking in destination and subsequent to the insert enable locking
ALTER TABLE my_table_rpt DISABLE TABLE LOCK;
Insert the data to the reports database table
Then
ALTER TABLE my_table_rpt ENABLE TABLE LOCK
Question:
Why does the large destination table (my_table_rpt) get locked in the RAC environment?