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10-20-2014 07:16 PM
10-20-2014 07:16 PM
Job/Proccess Priority in HP-UX
Hi All,
My system have cron run every minute. When my system have heavy load. All the proccess except the cron under root will be delay to proccess. Is the HP-UX have some priority proccess when handle the heavy load?
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10-20-2014 09:48 PM
10-20-2014 09:48 PM
Re: Job/Proccess Priority in HP-UX
My system cron has: 154 20
>My system have cron run every minute.
Do you really need every minute? Instead you may want to sleep.
>Is the HP-UX have some priority proccess when handle the heavy load?
It depends on the pri and the nice value.
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10-20-2014 11:40 PM
10-20-2014 11:40 PM
Re: Job/Proccess Priority in HP-UX
Hi Dennis Handly,
Yes, My HP-UX System need to give information every minute to our Central System Monitoring server. The Problem happen when My HP-UX System try to update alot of data to oracle database. And at the moment, all of cronjob except the cronjob under root will not execute it. My question is why cronjob under root can run but another cronjob under another user can't run?
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10-21-2014 04:04 AM - edited 10-21-2014 04:10 AM
10-21-2014 04:04 AM - edited 10-21-2014 04:10 AM
Re: Job/Proccess Priority in HP-UX
If you have root acces then you can place your cron in root crontab. Root process have highest priority.
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10-21-2014 11:22 AM - edited 10-21-2014 11:23 AM
10-21-2014 11:22 AM - edited 10-21-2014 11:23 AM
Re: Job/Proccess Priority in HP-UX
>why cronjob under root can run but another cronjob under another user can't run?
It depends on the priority and what they are doing. That Oracle database may slow down I/O bound jobs.
>Root process have highest priority.
Not unless you use super user to change the nice value.
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10-23-2014 12:04 AM
10-23-2014 12:04 AM
Re: Job/Proccess Priority in HP-UX
> It depends on the priority and what they are doing. That Oracle database may slow down I/O bound jobs
What are they doing is same checking the system status and send over to our central server monitoring.
>>Root process have highest priority.
>Not unless you use super user to change the nice value.
if like that, why the root cronjob is not effected?
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10-23-2014 01:37 AM
10-23-2014 01:37 AM
Re: Job/Proccess Priority in HP-UX
>if like that, why the root cronjob is not effected?
Are you saying that the cronjobs are exactly the same, except the user is different?
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10-27-2014 02:01 AM
10-27-2014 02:01 AM
Re: Job/Proccess Priority in HP-UX
Check if cron runs
ps -ef | grep cron
if cron doesn't runing
/sbin/init.d/cron start
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06-26-2015 02:15 AM
06-26-2015 02:15 AM
Re: Job/Proccess Priority in HP-UX
Try to set nice value.
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11-04-2015 11:12 AM
11-04-2015 11:12 AM
Re: Job/Proccess Priority in HP-UX
Nice for new process
renice for process already running.
With ps you can see also PRI and NICE values of your process
For oracle stuff here's a nice guide
http://docs.oracle.com/cd/B19306_01/server.102/b15658/appb_hpux.htm#UNXAR347