Re: EMC Storage Array Issue

Claudio,

    I didn't think to mention the process. It is always the ckpt (checkpoint) background process that reports the problem. The database goes down with an ORA-27062. claudio cutelli wrote:

> Hi,
> which background process had the problem?
> because if lgwr, it already write in sync mode ...
>
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Monday, April 15, 2002 5:33 PM
>
> > We have implemented a Sun Solaris Cluster (4 machines), connected to
> > an EMC storage array. The migration began last fall, and we now have 15
> > Oracle instances, with a mixture of 8.1.6 and 8.1.7, located there. We
> > recently have had 2 occurances of asynchronous I/O wait times exceeded.
> > When this occurs, every database crashes at the same time. The solution
> > from EMC is to turn asynchronous I/O off in all of the Oracle instances
> > (disk_async_io = false) and to increase the database writer slaves
> > (dbwr_io_slaves = <something not 0>) to emulate asynchronous I/O.
> > Has anyone run into this problem before? If so, how did you
> > "correct" it? My feeling is that EMC is trying to give us a bandage to
> > cover up the real problem, by trying to get Oracle to ignore it.
> >
> > Thank you.
> >
> > --
> > Scott Canaan (srcdco_at_rit.edu)
> > (585) 475-7886
> > "Life is like a sewer, what you get out of it depends on what you put
> > into it" - Tom Lehrer
> >
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > --
> > Author: Scott Canaan
> > INET: srcdco_at_ritvax.rit.edu
> >
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: claudio cutelli
> INET: c_cutelli_at_hotmail.com
>
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--
Scott Canaan (srcdco_at_rit.edu)
(585) 475-7886
"Life is like a sewer, what you get out of it depends on what you put into it"
- Tom Lehrer


-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Scott Canaan
  INET: srcdco_at_ritvax.rit.edu

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
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