Re: Async IO bug
From: Mark D Powell <Mark.Powell2_at_hp.com>
Date: Thu, 2 Sep 2010 07:26:24 -0700 (PDT)
Message-ID: <51fb6eae-46e6-4f4f-9258-0a514c7dc1a7_at_l20g2000yqm.googlegroups.com>
On Sep 2, 8:40 am, Mladen Gogala <gogala.mla..._at_gmail.com> wrote:
> On Thu, 02 Sep 2010 01:19:14 -0700, mhoys wrote:
> > We are on Red Hat 4 and apparently it's not possible to increase aio-
> > max-nr on this operating system? It's now set to 65536.
>
> Why wouldn't it be possible to increase aio-max-nr?
>
> $>cd /proc/sys/fs
> ADPRD1_at_oracle14 oracle Last rc=0 /proc/sys/fs
> $>cat aio-max-nr
> 300000
> ADPRD1_at_oracle14 oracle Last rc=0 /proc/sys/fs
> $>cat /etc/redhat-release
> Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
> ADPRD1_at_oracle14 oracle Last rc=0 /proc/sys/fs
>
> --http://mgogala.byethost5.com
Date: Thu, 2 Sep 2010 07:26:24 -0700 (PDT)
Message-ID: <51fb6eae-46e6-4f4f-9258-0a514c7dc1a7_at_l20g2000yqm.googlegroups.com>
On Sep 2, 8:40 am, Mladen Gogala <gogala.mla..._at_gmail.com> wrote:
> On Thu, 02 Sep 2010 01:19:14 -0700, mhoys wrote:
> > We are on Red Hat 4 and apparently it's not possible to increase aio-
> > max-nr on this operating system? It's now set to 65536.
>
> Why wouldn't it be possible to increase aio-max-nr?
>
> $>cd /proc/sys/fs
> ADPRD1_at_oracle14 oracle Last rc=0 /proc/sys/fs
> $>cat aio-max-nr
> 300000
> ADPRD1_at_oracle14 oracle Last rc=0 /proc/sys/fs
> $>cat /etc/redhat-release
> Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
> ADPRD1_at_oracle14 oracle Last rc=0 /proc/sys/fs
>
> --http://mgogala.byethost5.com
Lots of places run RedHat and have async IO in use. I would double check all the kernal parameters against the Installation Guide requirements.
HTH -- Mark D Powell -- Received on Thu Sep 02 2010 - 09:26:24 CDT