--最多同时运行的JOB个数；如果太小，JOB就排队等待；如果为0，就没有JOB会被执行。
SQL> show parameter job_queue_processes
NAME TYPE VALUE
-------------------------- ---------- -------------
job_queue_processes integer 10
--一个什么也不做的SP
CREATE OR REPLACE PROCEDURE mytest
IS
BEGIN
NULL;
END;
--一个往表里写数据的SPCREATE OR REPLACE PROCEDURE mytest
IS
BEGIN
insert into test_table values(...);
END;
--定时调用SP，10秒（86400秒=1天）SQL> VARIABLE job_id NUMBER;
SQL> BEGIN
-- :job_id中的冒号表示冒号后面的是变量，类似SQL Server的@ DBMS_JOB.SUBMIT(:job_id, 'mytest;', sysdate, 'sysdate + 10 / 86400') ;
COMMIT;
--记得一定要commit哦 END;
--查看刚才生成的Job IDSQL> set serveroutput on
SQL> execute dbms_output.put_line(:job_id)
--这里倒是不需要commit，直接execute就好了318--查看所有Job select * from user_jobs;
--删除JobSQL> BEGIN
DBMS_JOB.REMOVE(123); --123是Job ID
COMMIT;
END;
如果Job由于某种原因未能成功运行，Oracle将重试16次，之后如果还未能成功运行，将被标记为Broken。
http://www.blogjava.net/Jcat/archive/2009/12/17/306315.html
从10g开始，DBMS_SCHEDULER 逐步会替换掉 DBMS_JOB
DBMS_JOB has been around forever, and now it is deprecated. Although DBMS_JOB still exists in 10g and 11g, but only for backward compatibility. No new features are being added to dbms_job and you will likely quickly run into its limitations. Oracle recommends the use of DBMS_SCHEDULER in releases 10g and up. DBMS_SCHEDULER is a much more robust package and fully-featured than DBMS_JOB. To use the DBMS_SCHEDULER package a user must be granted the CREATE JOB privilege.
After replace DBMS_JOB with DBMS_SCHEDULER for all jobs successful, the job_queue_processes parameter can now be set to zero.
SQL> alter system set job_queue_processes=0;
posted on 2009-04-16 15:42
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