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set dba job to run every 4 hours

Posted on 2012-04-11
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Last Modified: 2012-05-01
I want a job to run every 4 hours not every 4 hours after the previous run completed.

I am not sure what the SYSDATE should be.


SYSDATE+240/1440  this isn't what I want.
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Question by:mw-hosting
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by:slightwv (䄆 Netminder)
ID: 37834515
>>this isn't what I want.

That is 4 hours from now.  If that is the interval for the job, it will run every 4 hours.

What about this isn't what you want?
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by:sdstuber
sdstuber earned 500 total points
ID: 37834523
assuming you mean 00:00:00,  04:00:00,  08:00:00, 12:00:00,16:00:00, 20:00:00

try this...


trunc(sysdate)+(mod(to_char(sysdate,'hh'),6)+1)*4/24
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by:sdstuber
sdstuber earned 500 total points
ID: 37834555
also, you might want to look into using dbms_scheduler instead of dbms_job

BEGIN
    DBMS_SCHEDULER.create_job(
        job_name         => 'YOUR_EVERY_4_HOUR_JOB_NAME',
        job_type         => 'PLSQL_BLOCK',
        job_action       => 'begin null; end; ',  --- put your code here
        start_date       => TRUNC(SYSDATE)+1,  -- start tomorrow or whenever you want
        repeat_interval  => 'FREQ=daily;BYHOUR=0,4,8,12,16,20;BYMINUTE=0;BYSECOND=0',
        enabled          => TRUE,
        comments         => 'This ought to do it');
END;
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by:David
ID: 37834850
Nice example, Sean.
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by:
mw-hosting earned 0 total points
ID: 37898716
I applied this:

'TRUNC(SYSDATE+4/24,''HH'')'

I don't have the option to use dbms_scheduler, thanks though.
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by:sdstuber
ID: 37898986
37898716 --- this allows for drift if your process takes more than an hour to run.
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Author Closing Comment

by:mw-hosting
ID: 37913874
Another option that allows every 4 hours, not depended on the hour provided.
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Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

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