Re: 10.1 and RMAN....

On 1 Aug 2005 13:58:44 -0700, "oracle_man" <oracle_man_at_yahoo.com> wrote:

>Rman is hanging inconsistently and hogging CPU. Here is my setup:
>
>2x AMD64 bit CPUs
>RAW disk and ASM management
>10.1.0.3.0 binaries
>RHEL 4
>
> The backups are done to local disk array on dedicated controller. ASM
>diskfarm is 14disks wide with a dedicated 2channel controller, and
>dedicated redos on a third controller. The backup config is fairly
>simple. I use a catalog, and do a full backup + archivelog delete.

Then post that simple script in order for us to help you.

>
>When I run my cron job, I see the ora_arcX spin up as high as the rman
>process(98+% CPU used). I've configured rman for 1 channel, hoping to
>free up the 2nd CPU, but arc is killing me now.

When backing up archivelogs, RMAN first archives the current redo log, so some arc-process(es) activity is expected . Especially if you have very large redo log files ("select bytes from v$log" will show that) which are close to full when the bacup starts.

• Kenneth Koenraadt