Re: New dirty tricks in Red Hat 5.x
From: Noons <wizofoz2k_at_yahoo.com.au>
Date: Wed, 20 May 2009 18:47:32 +1000
Message-ID: <gv0g1c$ias$2_at_news.eternal-september.org>
Mladen Gogala wrote,on my timestamp of 20/05/2009 4:28 PM:
> Kernels newer then 2.6.13 come with the "CFS" (Completely Fair
> Scheduler) I/O scheduler which can assign I/O priorities to processes.
> ionice -c 1 -n 0 -p `pgrep -f lgwr` will assign the highest real-time
> priority to the oracle log writer. If two or more processes have
> something to write to the same disk, log writer will always get there
> first. The same thing can be done with DBWR as well. There isn't much
Date: Wed, 20 May 2009 18:47:32 +1000
Message-ID: <gv0g1c$ias$2_at_news.eternal-september.org>
Mladen Gogala wrote,on my timestamp of 20/05/2009 4:28 PM:
> 1) CFS and ionice
> Kernels newer then 2.6.13 come with the "CFS" (Completely Fair
> Scheduler) I/O scheduler which can assign I/O priorities to processes.
> ionice -c 1 -n 0 -p `pgrep -f lgwr` will assign the highest real-time
> priority to the oracle log writer. If two or more processes have
> something to write to the same disk, log writer will always get there
> first. The same thing can be done with DBWR as well. There isn't much
Thanks, Mladen. Good info.
How's Ext4 coming along? They fixed the corruption stuff yet?
Now: don't get me started on how to get Aix to load Oracle into large-pages...
IBM's Power6 rocks, though! Received on Wed May 20 2009 - 03:47:32 CDT