Oracle db JOBS concurrency

Dumb questions on oracle database jobs scheduling:
Assume we are scheduling database jobs with all default values( except what to run,when to run)
job_queue_processes=1000
1) If a job is scheduled to run every 5 minutes. Currently if the job is taking 2 minutes to run based on data, now later after few months
if the job takes 7 minutes to run. Will there be duplicate jobs running at any given time ?
2) Can the same job be running more than once at the same instance ?
Thanks

If you are using DBMS_JOB then, assuming that what you mean when you say that the job is scheduled to run every 5 minutes is that you specified an INTERVAL of sysdate + interval '5' minute when you created the job, that interval is evaluated to determine the next runtime only after the current run completes. If the job actually runs for 2 minutes, that would mean that the job actually runs every 7 minutes not every 5 minutes. If the job then starts taking 7 minutes, the job will actually run every 12 minutes.
Justin

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Dear All,
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FROM V$SESSION A, V$SQLTEXT B
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Please revert asap as this is very urgent for me.
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Have you tried to query WF_ITEMS? -- http://etrm.oracle.com/pls/et1211d9/etrm_pnav.show_object?c_name=WF_ITEMS&c_owner=APPLSYS&c_type=TABLE
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Name                                      Null?    Type
OWNER                                     NOT NULL VARCHAR2(30)
CREDENTIAL_NAME                           NOT NULL VARCHAR2(30)
USERNAME                                  NOT NULL VARCHAR2(64)
DATABASE_ROLE                                      VARCHAR2(7)
WINDOWS_DOMAIN                                     VARCHAR2(30)
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Name                                      Null?    Type
OWNER                                     NOT NULL VARCHAR2(30)
CREDENTIAL_NAME                           NOT NULL VARCHAR2(30)
USERNAME                                  NOT NULL VARCHAR2(64)
DATABASE_ROLE                                      VARCHAR2(7)
WINDOWS_DOMAIN                                     VARCHAR2(30)
COMMENTS                                           VARCHAR2(240)
SQL> desc user_scheduler_credentials;
Name                                      Null?    Type
CREDENTIAL_NAME                           NOT NULL VARCHAR2(30)
USERNAME                                  NOT NULL VARCHAR2(64)
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WINDOWS_DOMAIN                                     VARCHAR2(30)
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Hello,
It's JOB, see following table for possible options , I recommend you to read throught this thoroughly before starting.
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_metada.htm#BGBIEDIA
Regards

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please who can assist me on how i can get a junior oracle database job.
i am an oracle certified professional 9i.

Hi,
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I have more than 4 1/2 years of Oracle APEX experience.
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MK,
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It's pretty easy to "pad" your skills on a resume and many managers have been burned by this. If you can list a link to your blog, or to your profile on OTN where a potential employer can pre-screen your skills, IMHO that definitely sets you apart from every other person out there looking for a job. I know this isn't an immediate answer to your question and I really do hope you find a job soon, but perhaps this idea is part of a long term "employment security" strategy.
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/* This is a sample program reading an input xml file and loads data in Oracle Database table
This program is executed through concurrent request and it has an input file name
it also creates a log for reading and inserting records from file and into a table
CREATE OR REPLACE PACKAGE BODY CBAP_ACCRUENT_XML_PKG AS
PROCEDURE read_emp_xml_file (errbuf out varchar2,
retcode out number,
in_filename in varchar2)
is
my_dir varchar2(10) := 'ASPEN_DIR';
l_bfile BFILE;
l_clob CLOB;
l_parser dbms_xmlparser.Parser;
l_doc dbms_xmldom.DOMDocument;
l_nl dbms_xmldom.DOMNodeList;
l_n dbms_xmldom.DOMNode;
l_temp VARCHAR2(1000);
v_empno number(10);
v_ename varchar2(50);
v_job varchar2(30);
v_mgr number(10);
v_hiredate date;
v_sal number(10);
v_comm number(10);
src_csid NUMBER := NLS_CHARSET_ID('UTF8');
v_read NUMBER(5);
v_insert NUMBER(5);
dest_offset INTEGER := 1;
src_offset INTEGER := 1;
lang_context INTEGER := dbms_lob.default_lang_ctx;
warning INTEGER;
BEGIN
v_read := 0;
v_insert := 0;
l_bfile := BFileName(my_dir, in_filename);
dbms_lob.createtemporary(l_clob, cache=>FALSE);
dbms_lob.open(l_bfile, dbms_lob.lob_readonly);
dbms_lob.loadclobfromfile(l_clob, l_bfile, dbms_lob.getlength(l_bfile), dest_offset,src_offset, src_csid, lang_context, warning);
dbms_lob.close(l_bfile);
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dbms_session.set_nls('NLS_DATE_FORMAT','''DD/MM/RR HH24:MI:SS''');
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l_parser := dbms_xmlparser.newParser;
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dbms_lob.freetemporary(l_clob);
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l_n := dbms_xmldom.item(l_nl, cur_emp);
v_read := v_read + 1;
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dbms_xslprocessor.valueOf(l_n,'EMPNO/text()',v_empno);
dbms_xslprocessor.valueOf(l_n,'ENAME/text()',v_ename);
dbms_xslprocessor.valueOf(l_n,'JOB/text()',v_job);
dbms_xslprocessor.valueOf(l_n,'MGR/text()',v_mgr);
dbms_xslprocessor.valueOf(l_n,'HIREDATE/text()',v_hiredate);
dbms_xslprocessor.valueOf(l_n,'SAL/text()',v_sal);
dbms_xslprocessor.valueOf(l_n,'COMM/text()',v_comm);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm)
values(v_empno,v_ename,v_job,v_mgr,v_hiredate,v_sal,v_comm);
v_insert := v_insert + 1;
END LOOP;
-- Free any resources associated with the document now it
-- is no longer needed.
dbms_xmldom.freeDocument(l_doc);
--remove file to another directory
commit;
fnd_file.put_line(fnd_file.LOG,'Number of Records Read : '||v_read);
fnd_file.put_line(fnd_file.LOG,'Number of Records Insert : '||v_insert);
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WHEN OTHERS THEN
dbms_lob.freetemporary(l_clob);
dbms_xmlparser.freeParser(l_parser);
dbms_xmldom.freeDocument(l_doc);
retcode := sqlcode;
ERRBUF := sqlerrm;
ROLLBACK;
END read_emp_xml_file;
END;
<?xml version="1.0" ?>
- <EMPLOYEES>
- <EMP>
<EMPNO>7369</EMPNO>
<ENAME>SMITH</ENAME>
<JOB>CLERK</JOB>
<MGR>7902</MGR>
<HIREDATE>17-DEC-80</HIREDATE>
<SAL>800</SAL>
</EMP>
- <EMP>
<EMPNO>7499</EMPNO>
<ENAME>ALLEN</ENAME>
<JOB>SALESMAN</JOB>
<MGR>7698</MGR>
<HIREDATE>20-FEB-81</HIREDATE>
<SAL>1600</SAL>
<COMM>300</COMM>
</EMP>
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<EMPNO>7521</EMPNO>
<ENAME>WARD</ENAME>
<JOB>SALESMAN</JOB>
<MGR>7698</MGR>
<HIREDATE>22-FEB-81</HIREDATE>
<SAL>1250</SAL>
<COMM>500</COMM>
</EMP>
- <EMP>
<EMPNO>7566</EMPNO>
<ENAME>JONES</ENAME>
<JOB>MANAGER</JOB>
<MGR>7839</MGR>
<HIREDATE>02-APR-81</HIREDATE>
<SAL>2975</SAL>
</EMP>
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<EMPNO>7654</EMPNO>
<ENAME>MARTIN</ENAME>
<JOB>SALESMAN</JOB>
<MGR>7698</MGR>
<HIREDATE>28-SEP-81</HIREDATE>
<SAL>1250</SAL>
<COMM>1400</COMM>
</EMP>
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<EMPNO>7698</EMPNO>
<ENAME>BLAKE</ENAME>
<JOB>MANAGER</JOB>
<MGR>7839</MGR>
<HIREDATE>01-MAY-81</HIREDATE>
<SAL>2850</SAL>
</EMP>
- <EMP>
<EMPNO>7782</EMPNO>
<ENAME>CLARK</ENAME>
<JOB>MANAGER</JOB>
<MGR>7839</MGR>
<HIREDATE>09-JUN-81</HIREDATE>
<SAL>2450</SAL>
</EMP>
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<EMPNO>7788</EMPNO>
<ENAME>SCOTT</ENAME>
<JOB>ANALYST</JOB>
<MGR>7566</MGR>
<HIREDATE>19-APR-87</HIREDATE>
<SAL>3000</SAL>
</EMP>
- <EMP>
<EMPNO>7839</EMPNO>
<ENAME>KING</ENAME>
<JOB>PRESIDENT</JOB>
<HIREDATE>17-NOV-81</HIREDATE>
<SAL>5000</SAL>
</EMP>
- <EMP>
<EMPNO>7844</EMPNO>
<ENAME>TURNER</ENAME>
<JOB>SALESMAN</JOB>
<MGR>7698</MGR>
<HIREDATE>08-SEP-81</HIREDATE>
<SAL>1500</SAL>
<COMM>0</COMM>
</EMP>
- <EMP>
<EMPNO>7876</EMPNO>
<ENAME>ADAMS</ENAME>
<JOB>CLERK</JOB>
<MGR>7788</MGR>
<HIREDATE>23-MAY-87</HIREDATE>
<SAL>1100</SAL>
</EMP>
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<EMPNO>7900</EMPNO>
<ENAME>JAMES</ENAME>
<JOB>CLERK</JOB>
<MGR>7698</MGR>
<HIREDATE>03-DEC-81</HIREDATE>
<SAL>950</SAL>
</EMP>
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<EMPNO>7902</EMPNO>
<ENAME>FORD</ENAME>
<JOB>ANALYST</JOB>
<MGR>7566</MGR>
<HIREDATE>03-DEC-81</HIREDATE>
<SAL>3000</SAL>
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<EMPNO>7934</EMPNO>
<ENAME>MILLER</ENAME>
<JOB>CLERK</JOB>
<MGR>7782</MGR>
<HIREDATE>23-JAN-82</HIREDATE>
<SAL>1300</SAL>
</EMP>
</EMPLOYEES>

http://download-west.oracle.com/docs/cd/B13789_01/appdev.101/b10790/toc.htm
Take a look at Examples 4-8 and 4-9. Even thought this is 10g doc code should work on 9.2.4 or later

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Oracle db JOBS concurrency

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