Re: I/O calls from Oracle to OS

FM <fabrizio.magni_at_mycontinent.com> wrote in message news:<carer0$g44$1_at_sun250.unimi.it>...
> This post got lost (I can't see it published) so I'm sending it again.
> Sorry if you'll find it duplicated.
>
>
> Hello,
> probably this is more a sysadmin question than a DBA one but how can I
> check if an I/O call from oracle is divided in several reads (or writes)
> by the operating system?
>
> example: if oracle asks at the OS for a 1M block and the maximum I/O
> blok of my operating system is 512K may I monitor the two different reads?
> How?
>
> I'm most interested in Unix but if you know a common way...
>
> Thanks
> Fabrizio Magni

When debugging I/O issues in the past on Solaris, I've used the truss command to see what DBWR is doing at the OS layer. Check out the man page and see if it would work for you.

Ron Forrester Received on Thu Jun 17 2004 - 10:41:13 CDT