Re: Extent size on RHEL 5 vs 6

  • From: Waldirio Manhães Pinheiro <waldirio@xxxxxxxxx>
  • To: dkenlwork@xxxxxxxxx
  • Date: Mon, 13 Oct 2014 15:13:10 -0300

Hello Deborah and List, good afternoon

I'm not sure if talking about only PE will be enough to your question,
because you can use local disk or SAN for example.

BTW, you can see another good functionality when talking about RHEL6,
tuned. With tuned you can set your server according " templates" or just
create your personal configuration according your necessity.

Bellow a default sample:

[root@rhel01 abrt]# tuned-adm list
Available profiles:
- throughput-performance
- spindown-disk
- virtual-host
- default
- laptop-ac-powersave
- laptop-battery-powersave
- server-powersave
- virtual-guest
- desktop-powersave
- enterprise-storage
- latency-performance
Current active profile: default
[root@rhel01 abrt]#

and all related configuration are stored in /etc/tune-profiles

If you need some help, just reply!

Take Care

msn: waldirio@xxxxxxxxx
Skype: waldirio

On Mon, Oct 13, 2014 at 2:36 PM, D Kenl <dkenlwork@xxxxxxxxx> wrote:

> We need to migrate our various Oracle servers (database, warehouse, web
> server) from RHEL 5 to 6, so have started testing.  One difference I
> noticed on the install is that RHEL 5 defaults the LVM physical extent size
> to 32 MB, while RHEL 6 defaults it to 4 MB.  With RHEL 5 I just went with
> the default size, but now that I see a different default for 6, I’m
> wondering if one is better than the other in terms of Oracle?  I did find
> some sites which mentioned that Oracle frequently requires a specific LVM
> extent size for better IO performance, but I can’t find anything specific
> in Oracle documentation, MOS, etc that refers to this.  Does anyone know
> what extent size is preferred for the various Oracle setups (database,
> warehouse, etc), or what documentation would at least specify this?  Or
> does it differ depending on your environment?  TIA for any info!
> Deborah

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