How And When The Database Release A Row Lock
May 30, 2013
We are using the following statement to obtain a row lock in a table in the database(ORACLE 10G), SELECT * FROM {TABLE_NAME} WHERE ID = 1 for update and if we succeed grabbing the row lock we will continue to issue a update statement every 30 seconds to preserve the lock as far as possible. here is the update statement to preserve the lock,
UPDATE {TABLE_NAME} SET time = ? WHERE ID = 1.
As you see more longer we keep holding the row lock , more update statements are submitted in the pending transaction. In normal case our application can grab the exclusive row lock and works for a long time,however sometimes a connection reset exception is thrown and our application will close the connection(I assume the pending transaction will be rolled back by the database) and exit the JVM. Since other applications will keep trying to grab the same row lock to become the master role, we expect one of them can succeed but they are all failed because the database has not released the row lock as expected. how and when the row lock can get released in our use case?
View 14 Replies
ADVERTISEMENT
Apr 12, 2010
How to Release Lock on table ? ( without killing session )
create table x ( a number);
insert into x(a) values (1);
Lets lock table.
declare
cursor c is select * from x for update;
begin
open c ;
end;
[code]....
View 15 Replies
View Related
Nov 29, 2011
am trying to downgrade my oracle database 10g release 10.2.0.2.0 to 10.2.0.1.0the reason for this is that i had to copy /oracle_home/bin utilities from 10.2.0.1 to 10.2.0.2 because of this most utilities like rman,dbca were not working.
i think i need to downgrade my oracle database 10g release to 10.2.0.1.0 right?i read some oracle documentations of database downgrade instruciting me to
>take full backup of oracle DB
>ORACLE_HOME/bin/emctl stop dbconsole
SQL> STARTUP DOWNGRADE
DROP USER sysman CASCADE;
>SQL> SPOOL downgrade.log
[code]....
View 1 Replies
View Related
Mar 13, 2013
Is Oracle Database 11g Release 2 (11.2.0.3.0) available for IBM AIX on POWER Systems (64-bit), Or do we need to upgrade 11.2.0.1 to 11.2.0.3.0.
View 4 Replies
View Related
Oct 16, 2012
how to mask data in oracle 11g database release 1
my environment is
Database: 11g release 1
os: AIX 6 (64 bit)
GC:10g release 1
View 12 Replies
View Related
Dec 27, 2012
how many users we can create in oracle 11g release 2 database. Is there any specific limit or parameter for that.
View 1 Replies
View Related
Jun 16, 2013
I know how to use database links in various forms, but I've been trying to think through how the authentication works for a connected user link in 11g. If I create the link like this,create public database link using 'orcl';then any user can use the link, provided they have an identical username/password in the two databases. With pre-11g passwords, it was understandable: the password was salted with the username, so the hash of the password would be the same in both databases, and I assumed that the logon through the link used some sort of IDENTIFIED BY VALUES mechanism. But in 11g, the salt will different in the two databases. So the hash will be different. And of course Oracle never stores the actual password. So I don't see how the authentication works.
View 4 Replies
View Related
May 11, 2013
which is really a HA zone clustered in VCS(not important for installation of the database).
What parameters do I need to set or change in the Solaris zone, there seems to be no /etc/system file.
View 3 Replies
View Related
Oct 4, 2012
we know we can see lock mode held in session can be analysed using LM column in v$lock.But i confused in seeing LM column it all shows in numbers from 0 to 6.
eg
0,'None(0)',
1,'Null(1)',
2,'Row Share(2)',
3,'Row Exclu(3)',
4,'Share(4)',
5,'Share Row Ex(5)',
6,'Exclusive(6)')
View 1 Replies
View Related
Jun 28, 2012
I have altered an user account and set the account status as expired.When I tried to connect with that user, oracle prompted for changing password.
But, after I changed the password, I got an error message as ora-01017 invalid username/password logon denied password unchangedWhat is the cause and solution for it? I am using 11g database and 10g client.
View 15 Replies
View Related
Aug 29, 2013
I would like to know 2 days back lock conflicts session information which user held the lock,sql text,when the lock released. any sql query or view in oracle 11g db.
View 1 Replies
View Related
Mar 30, 2012
I have a RAC environment with 3 nodes and application using Oracle Form Reports that access the database. Every day the application cause many locks on database when execute insert, update and delete. I don't understand why so much locks. Are there a way to avoid this? Always I have to eliminate session causing locks.
View 27 Replies
View Related
Jul 12, 2011
I have a doubt in locking user account in oracle database.I was told to drop some unusable users in database which my clients dont require them.I verified the dependent objects of those users but not sure if these users can be dropped.
Instead can i make those user accounts locked so that they cannot connect to database? Would there be any impact on database performance if i lock those user accounts?
Is locking an account and dropping users is similar in anyway?
View 12 Replies
View Related
Nov 18, 2011
I have a problem...
I created a tablespace called my_ts:
CODECREATE TABLESPACE my_ts DATAFILE 'C:\Oracle\oradata\db\my_ts.dbf' SIZE 5M EXTENT MANAGEMENT LOCAL UNIFORM SIZE 128K;
ALTER DATABASE DATAFILE 'C:\Oracle\oradata\db\my_ts.dbf' AUTOEXTEND ON;
Its was sucessfully created and my_ts.dbf file has 5MB
charging with data...
CODEcreate table big_table tablespace my_ts as select * from dba_objects;
select * from big_table;
begin
for i in 1..10 loop
insert into big_table select * from dba_objects;
end loop;
end;
Now the my_ts.dbf file has 90MB
Now I want drop this table:
CODEdrop table big_table purge;
And my tablespace file still has 90MB.
I already tried to restart the database but doesn't works...
how can I reduce the size to the original (5MB)?
View 3 Replies
View Related
May 27, 2012
assuption is that when we truncate the partition it immediatly release the allocatd storage.i have just tested the scenario , but still i can see that table size is same even after truncating the partition( which have around 25% of the data)
alter table test truncate partition t1p3 update indexes ;
OR
alter table test truncate partition t1p3 drop storage update indexes ; to see the table size:
SELECT owner, table_name, TRUNC(sum(bytes) / 1024 / 1024) Meg
FROM (SELECT segment_name table_name, owner, bytes
FROM dba_segments
WHERE segment_type = 'TABLE'
UNION ALL
[code]...
View 14 Replies
View Related
Nov 24, 2010
Share 11g Release 2 Grid infrastructure and RAC installation experience on Sun SPARC. Any documentation which provide complete information from server setup to database setup.
View 2 Replies
View Related
Sep 4, 2013
Ours is Oracle 11.2.0.2.0 Db 4 instances RAC on Unix AIX OS.Since long we are facing problem that CPU utilization reached 100% and reboot is required alteast once or twice a month.On seeing the Events Logs we find that the Event "CURSOR PIN S WAIT FOR X" is consuming a lot of waits.
On analyzing i came to know that we are firing same query from Application 15 to 20 lack times for which a lot of Mutex keeps spining for getting Shared Mode and consumes a large amount of CPU.
View 3 Replies
View Related
Feb 15, 2012
How to delete flashback log and to release the space?
I guess that it maybe like archive log ,it can release the space using RMAN.But when i try a test ,it fail.
SQL> STARTUP MOUNT;
SQL> ALTER DATABASE FLASHBACK OFF;
View 6 Replies
View Related
Jul 24, 2013
I was prompted by an error in the middle of Oracle 11g Release 2 installation and unable to continue further.
The error was file not found e:product11.2.0.dbhome_3oc4jj2eeoc4j_applicationsapplications em.ear.
View 2 Replies
View Related
Dec 14, 2012
we need to find the key pressed action and key release action on Oracle form 10g. On key pressed (i.e. key-up, key-down, key-page-up and key- page-down) the event will be fired and as soon as the user release the key, the event will be stop.
As current situation, we have one form which contains the database blocks. As per search condition, all the data populated in Database block, there are 1000 and more records. Now user going use any of key (i.e. key-up, key-down, key-page-up and key-page-down) as he pressed key ( say Key- down) it scrolled down but as soon as he release the key, the event is not stopped. its going on going down then stop.
Is it possible, as user release the key scrolling will stopped at same time ?
View 3 Replies
View Related
Oct 23, 2012
I am new to this forum. I want to install XE 11g Release 2 in windows 7 64 bit. Can I intall 'Oracle Database Express Edition 11g Release 2 for Windows x32' or is there is 64bit version?
View 2 Replies
View Related
Aug 8, 2012
I'm trying to install 11g Release 2 on a CentOS (4.9) box, but the pre-req check shows that I'm missing the following packages (I had 9 to begin):
gcc-3.4.6 (X86_64)
gcc-c++-3.4.6(X86_64)
libstdc++-devel-3.4.6
Tried to use the yum command "yum install gcc" but get the following error.
Error: cannot find a valid baseurl for repo:update
I think this is due to the "CentOS-Base.repo" file, which I've tried to update by changing the mirror URL's but no success.Then tried to find the rpms online ([URL]...
INFO: Start output from spawned process:
INFO: ----------------------------------
INFO:
INFO: rm -f ntcontab.*
[code]....
View 2 Replies
View Related
May 28, 2009
I want to upgrade all the Oracle 10g Release (10.2.0)master sites (bi-directional) databases to Oracle 11g Release (latest). In fact, we are using bi-directional oracle streams and snapshot replication, it means capture,propagate and apply process is running.
View 1 Replies
View Related
May 9, 2012
why we seem to be unable to report against the ap invoice hold release date using Discoverer in Oracle 11.5.10? the person who wrote our current report used a decode statement to look at the last update date of the release lookup code to create a release date, but i am trying to recreate this in a different tool (Qlikview) and just wanted to understand why we seem to be unable to report on the field as is!
View 4 Replies
View Related
Jul 23, 2012
I was pretty sure that every TX lock needs TM lock (at least one). But now on my 9.2.0.8 I can see:
SQL> select * from v$lock where type <> 'MR';
ADDR KADDR SID TY ID1 ID2 LMODE REQUEST CTIME BLOCK
---------------- ---------------- ---------- -- ---------- ---------- ---------- ---------- ---------- ----------
070000026525D648 070000026525D668 4 RT 1 0 6 0 6551105 0
070000026525D3E8 070000026525D408 5 XR 4 0 1 0 6551108 0
070000026525D6E0 070000026525D700 6 TS 2 1 3 0 6551103 0
0700000267173060 07000002671731D8 36 TX 524304 1532490 6 0 2952 0
0700000266EC07F0 0700000266EC0968 63 TX 655400 1550373 6 0 3750 0
0700000266EC0E78 0700000266EC0FF0 65 TX 720899 1461986 6 0 3711 0
0700000265FB6638 0700000265FB67B0 79 TX 327689 1556563 6 0 3825 0
0700000266EDEA08 0700000266EDEB80 85 TX 786469 1365502 6 0 3461 0
0700000266F52498 0700000266F52610 101 TX 196609 1556026 6 0 3850 0
0700000266EDDD10 0700000266EDDE88 126 TX 1114150 1344174 6 0 1474 0
0700000266F517A0 0700000266F51918 137 TX 589849 1605371 6 0 6345 0
07000002671554B8 0700000267155630 207 TX 262156 1529066 6 0 3826 0
07000002670E13B8 07000002670E1530 238 TX 917504 1391304 6 0 66 0
0700000266D094A8 0700000266D094D0 238 TM 194337 0 2 0 35 0
0700000266D093D8 0700000266D09400 238 TM 43802 0 2 0 35 0
0700000266D09308 0700000266D09330 238 TM 7387 0 2 0 35 0
0700000266D09238 0700000266D09260 238 TM 7374 0 2 0 35 0
0700000266D09168 0700000266D09190 238 TM 7380 0 3 0 35 0
0700000266D09098 0700000266D090C0 238 TM 7228 0 3 0 66 0
0700000266F51E28 0700000266F51FA0 261 TX 393224 1563714 6 0 4586 0
So whats can cause this, I can see that TX locks are mostly from JDBC connection from Application server .
View 3 Replies
View Related
Oct 10, 2012
In my current project, I am handling an Oracle database with version 10.2.0.3. I analyzed the AWR report for the past month abd saw the following wait events consistently:
CPU time - 45.6% (% Total Call Time)
db file sequential read - 30.6% (% Total Call Time)
enq: TX - row lock contention - 18.8 % (% Total Call Time)
I have uploaded the report for your reference.What should be my approach to troubleshoot this?
Attached File(s)
awr_report.html ( 382.28K )
Number of downloads: 6
View 1 Replies
View Related
Jul 19, 2012
how one can lock a particular row in a table.for example i have a employee table in which 50 records. now i want to lock only 10 records of the employee table.
View 8 Replies
View Related
Mar 14, 2011
I have a transaction table with some custom properties and two status columns. There are 2 different applications(.Net and Pl/SQL Procedure) using the table. Both the process run parallel and fetch records one by one, perform some calculation and update the status column.
-.Net updates - Extraction_status
-Pl/SQL updates - Ingestion_status
There are likely more chances that both applications will fetch the sane record and try to update the same row. This will cause a lock. Can i use row level lock before update by each application? Or is there any other methods/process in which this can be handled. ?
View 11 Replies
View Related
Aug 28, 2012
begin
for i in 1..10000 loop
update table1
set col1= col1+1
where type =1;
commit;
end loop;
end;
My question is, if a strored procedure contains the script above and the said procedure will be invoked by two or more sessions at the same time. Does it mean that the 1st session will lock the related rows and other sessions will have to wait for loop in session one to finish?
View 18 Replies
View Related
Jul 18, 2013
i have application where user logs and perform manipulation operation such as insert and update on database table.some time its possible that same user login twice, i just want to hold one session until and unless dml operation perform by another session gets complete.how to accomplish this in database level .
View 6 Replies
View Related