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Oracle jobs, minimum interval,_job_queue_interval parameter
by Vazha Mantua Wednesday, September 5, 2012 3:21 PM

Good Day all,

Today we resolve problem which appear when you try run oracle job with interval less then 5 second, but unfortunately it run’s in 5 second.

Cause of this is default parameter of job_queue_interval, which is set 5 second. This parameter means wakeup interval in seconds for job queue coordinator , so we got 5 second gap with next job running.

On oracle documentation we read that job_queue_interval is obsolete in oracle 9i version , but there is hidden parameter with same name and it’s still valid, changed only technology , in oracle 8 it was snp background process, now it is job queue coordinator, which is responsible for job running.

So solution of decreasing job running interval is set _job_queue_interval with low value than 5 second.

you can also avoid change oracle hidden parameter, if you use dbms_scheduler.

 

 

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Comments (10) -

9/17/2012 1:45:10 AM #

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10/10/2012 11:24:21 AM #

Otar Melia

Good article,

From my experience, it is not good idea, to set a job to run in every second. As i understand, Oracle opens a connection every time job runs. So in order to reduce such a heavy operation, we normally create a job which loops infinitely and put a dbms_lock. sleep inside a loop. (additionally you will need a mechanism to stop this job, which can be very easily created).

This is just practical advice and not a statement by  professional.

Otar Melia Georgia

6/24/2013 10:45:44 AM #

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