SQL & 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
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Jan 28, 2013
I 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.
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Oct 15, 2012
I want to read 1 table. If the date is less than today, I want to update 4 other tables. I only want to do this update once a day.
While the 4 other tables are being updated, I want the other web users to pause for the update while this procedure runs.
Is there a better way to do this?
Here is what I have:
CREATE OR REPLACE PROCEDURE TEST_TODAY2 AS
-- to create the table
-- create table test_today(updated_date date);
-- insert into test_today(updated_date) values (sysdate-1);
-- select * from test_today;
cursor daily_update_cur is
select updated_date from test_today
for update of updated_date;
[Code]...
Please use {noformat}{noformat} tags before and after your code as described in the FAQ: {message:id=9360002}.
I've corrected it this time for you.
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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)')
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Aug 16, 2013
I 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.
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Jan 6, 2011
Under what scenarios do we lock a table in the exclusive mode.
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Aug 23, 2010
I 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.
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Sep 16, 2010
there'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.
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May 24, 2013
IS it possible TO schedule same JOB WITH different timings.
I need only one SCHEDULER which should run ON saturday AT 6 pm ,AND monday AT 9 pm.
CREATE TABLE dept1 AS SELECT * FROM dept;
CREATE OR REPLACE
procedure update_record is
BEGIN
insert into dept1 values(10,'xxx','xxx');
END;
[code].....
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Nov 28, 2011
i create password file in oracle 10g now i want to Set the EXCLUSIVE to REMOTE_LOGIN_PASSWORD initialization parameter. so what should i do.
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Dec 21, 2011
PFB code i used to schedule a job as per my requirement. And the procedure is executing fine, but when im about to run it is getting hang.
create or replace procedure scheduler_alert(frq varchar2,intrvl number) is
begin
dbms_scheduler.create_job(
job_name=>'scheduler_alert',
job_type=>'stored_procedure',
job_action=>'alertlog_error',
start_date=>SYSTIMESTAMP,
repeat_interval=>'FREQ='||frq||';INTERVAL='||intrvl,
enabled=>true,
auto_drop=>false);
end;
/
When im trying to run the job it is getting hang.
exec dbms_scheduler.run_job('scheduler_alert');
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Jan 23, 2011
how to do report scheduling.? So that server can auto run those report at specified time. And send output to user.
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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]...
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Apr 28, 2003
How 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
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May 10, 2002
I 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)
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Jun 30, 2008
I'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 ...
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Mar 9, 2010
I need to schedule a stored procedure and a stored package every day @6:30 AM.
I have also a merge statement that I need to execute before stored procedure is executed.
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Jul 28, 2013
we need to create a materialized view which should do complete refresh at pre determined interval like - 6am,12pm and 4pm every day.
Is it possible to have this option in materialized view?
As of now, I could understand we can do "start with" and "next" option which will schedule refresh with same interval but not with different time interval which I mentioned above.
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Feb 26, 2012
i have a production database server with 2 node rac. i now have a separate database server for my report db. Now i want to do an automatic export of the production database or a schema in the production database and then import it automatically to the report db immadiately after the export job finishes at a specific time, say 12 midnight everyday. how do i go about this using crontab or any other better solution. my database is 11gr2 and operating system is rhel 5.7.
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Sep 12, 2012
I have a shell script which triggers a batch in our application (an application which is not integrated with any other scheduler and is trying to integrate with OEM for the first time).
Is it possible to schedule a job to run this shell script in OEM ?
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Jul 25, 2012
I would like to export my whole database every evening. How can I do this using enterprise manager.
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Nov 12, 2013
Oracle DB Version - 11g XE I scheduled a job using dbms_scheduler which will insert a record into table T for each minute. I didnt mention COMMIT inside my procedure but records are being commited after each successful execution. How come it is possible. Here is my code.
SQL> create table t ( empno number, creation_date date);
Table created
SQL> create or replace procedure test_proc 2 is 3 4 begin 5 6 insert into t values (1,sysdate); 7 8 end; 9 /
Procedure created
[Code]....
PL/SQL procedure successfully completed
SQL> select * from t;
EMPNO CREATION_DATE---------- ------------- 1 11/12/2013 11 1 11/12/2013 11 1 11/12/2013 11 1 11/12/2013 11 1 11/12/2013 12 1 11/12/2013 12 1 11/12/2013 12 1 11/12/2013 12 1 11/12/2013 12
9 rows selected
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Nov 10, 2012
I have oracle 11g r2, I have a table emp, where i have three columns emp_no,status and creation_date, creation date is a time stamp like '02/09/2012 17:59:47'.
I have to trigger an email if the status is not updated for 30 minutes.
DECLARE
CUSROR C_GET_DATA IS
/*SELECTING RECORDS*/
SELECT * FROM EMP WHERE creation_date BETWEEN CREATION_DATE AND CREATION_dATE+30 AND STATUS IS NULL;
[Code]....
in the above code "CREATION_DATE AND CREATION_dATE+30" will give 30 days, how can i select just 30 minutes and schedule it every 30 minutes, so that email is triggered for if status is not updated for more than 30 minutes.
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Jul 2, 2012
I need to create an oracle job that will execute a shell script. i need to run it only when I call it(so not to be scheduled).
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Sep 7, 2013
I have requirement as follows. I need to load the data to the target table on every Saturday. My source file consists of data of several sates. For every week i have to load one particular state data to target table. If first week I loaded AP data, then second week on Saturday karnatak, etc.
Provide code also how can i schedule the data load with every Saturday with different state column values automatically.
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Dec 15, 2010
I want to run some reports based on certain schedule lets say after 1 hour or 2 hours may be send an email.How to do it.
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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 .
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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
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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.
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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. ?
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