Table Locks In Exclusive Mode
Jan 6, 2011Under what scenarios do we lock a table in the exclusive mode.
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Unexplainable 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.
Data Guard :: ORA-01102 / Cannot Mount Database In EXCLUSIVE Mode
Apr 28, 2003How i create Standby Database in Same HOST, we using SUN OS 5.8.
I read form Oracle DOC that i can create Standby Database in Same HOST and follow the tutorial , but when i try to mount standby database using ALTER DATABASE MOUNT STANDBY DATABASE EXCLUSIVE; i got a error message ORA-01102: cannot mount database in EXCLUSIVE mode
Server Administration :: ORA-01102 Cannot Mount Database In Exclusive Mode
May 10, 2002I performed Shutdown Immediate in Oracle 8I and now I am unable to mount the database.I'm getting the following message: ORA-01102 Cannot mount database in Exclusive mode/I only have one database running on this machine. It was automatically created by Oracle installer upon installation of Oracle software. I can no longer connect via SQL * Plus,Only through Server Manager (connect internal)
View 8 Replies View RelatedData Guard :: Oracle 9i - Cannot Mount Database In EXCLUSIVE Mode
Jun 30, 2008I'm trying to create a physical standby database on my Oracle9i DB runing on WinXP.
Note: I have both Primary and Standby on the same system.
Actually everything went well .... I did created the standby DB but the problem is I can not start my primary DB if my standby DB is mounted. I get this error:
ORA-01102: cannot mount database in EXCLUSIVE mode
And when I read about the error message I learnt that I should start my DB in compatible mode ...
SQL & PL/SQL :: Mirroring A Table With Exclusive Column?
Sep 16, 2010there's a table with 3 columns oid, value, status in a scheme. Now i want this table to be used in an other scheme. So i used grant select to the other scheme so it could read the data. But now i want the column status for independent use of updates in the 2nd scheme. So i want the columns oid & value in one place (table in 1st scheme) and 2 places for status (in original table and in the 2nd scheme. I could create a status table in scheme 2 with oid and status and create an updatable view over table from scheme 1 and this status table - joined over oid. Sounds not too tough but if data is inserted in scheme 1 (all 3 colums) the status table in scheme 2 has no idea of this new data.I want to prevent using triggers or notifications.
View 23 Replies View RelatedLocks 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?
Updating Table In Session - Shared Versus Exclusive Lock
Jan 28, 2013I have a question. If we have two scott sessions. I am updating a table EMP in session
1. It means it is exclusively locked.It cannot be used by session 2. Then can we use select command on table EMP in session
2.? This command should not work according to me. But it is working.
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?
EXCLUSIVE Value Depreciated?
Aug 16, 2013I read that the value EXCLUSIVE (REMOTE_LOGIN_PASSWORDFILE parameter) is supported for backward compatibility. It now has the same behavior as the value SHARED.So is the EXCLUSIVE value deprecated? Oracle Database Reference doesn't mention that.
View 6 Replies View RelatedSQL & PL/SQL :: Exclusive Lock On Tables - Run Job By Scheduling
Sep 27, 2011 @ the end of the day means After date changes i need to populate the new row in Some of my tables with the previous date values with the new date.. In that time some other Transaction will Occur on those tables so we need to lock all the tables in that time..Even i tried by doing the Exclusive lock on the tables...
execute immediate 'LOCK TABLE CTR_SALES IN EXCLUSIVE MODE NOWAIT';
execute immediate 'LOCK TABLE CTR_STK_ASSIGN IN EXCLUSIVE MODE NOWAIT';
And how to run this function @ 12:00 in the midnight by scheduling.... And 1 more thing how to pick the recent (Transaction) row on that table. I tried from the rowid it's not working
Security :: Set Exclusive To Remote Login Password?
Nov 28, 2011i create password file in oracle 10g now i want to Set the EXCLUSIVE to REMOTE_LOGIN_PASSWORD initialization parameter. so what should i do.
View 5 Replies View RelatedBackup & Recovery :: ORA-19573 - Cannot Obtain Exclusive Enqueue For Datafile 1?
Nov 6, 2012 i backup my database using rman into my external disk using this command
RMAN> run
2> {
3> backup database format 'H:ackupkp_%u' tag='sh';
4> backup archivelog ALL format 'H:ackuparc_%u' Delete input;
5> }
Starting backup at 06-NOV-12
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=F:ORACLEPRODUCT10.2.0ORADATAORCLSYSTEM01.DBF
[code]...
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.
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?
View 4 Replies View RelatedHow 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;
Forms :: Run 10g In Mode Debug?
Jan 5, 2012I want to run form 10g in mode debug, however when i set break point in code and press shift+ F9 ( or run Debug by click icon on Form 10) then Form still run but not run in mode debug. Now i want to run form 10g in mode debug, how do i do?
View 2 Replies View RelatedAuditing No Archive Log Mode
Jun 8, 2012I am using Oracle Database 10.2 in No Archive Log Mode. what auditing options are available in No Archive Log mode ?
View 4 Replies View RelatedRMAN :: No Archive Log Mode
May 6, 2013resolving the below issue.
environment:
DB version:11.2.0.3.0
OS : IBM/AIX RISC System/6000
backup tool : Symantec net backup.
When I start RMAN backup through Symantec net backup tool same is failing. when I see in log file below error message is recorded in the same.
################################################################################
Starting backup at 06-MAY-13
channel ch00: starting compressed incremental level 0 datafile backup set
channel ch00: specifying datafile(s) in backup set
RMAN-03009: failure of backup command on ch00 channel at 05/06/2013 07:09:16
[Code]....
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ch00 channel at 05/06/2013 07:09:16
ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode
RMAN> RMAN>
Recovery Manager complete.
####################################################################################
But, DB is up and operating fine with ARCHIVELOG mode at that movement not even restart also.
how to resolve.
Putting A Database In Backup Mode?
Aug 25, 2010I have Oracle loaded on a server. I have three database instances - /db1, /db2, /db3. I want to put the database in backup mode before I take a backup copy of the three database instances.
Is the database put in backup mode just once and then the three instances can be backed up? Or does each instance need its own script to put the database in backup mode?
Oracle 11g R2 Installation Using Silent Mode / GUI
Oct 29, 2012I have to install oracle 11g R2 on AIX. but I need to install from putty I have configured cygwin Xwindow. able to get GUI from my local VMware linux server but unable to get GUI for remote servers.
and followed the same process as I did for my local vmware linux box. How to get the GUI for remote servers as well. If it not possible or any configuration needs to be done at remote site.