Since I started this thread, I thought I'd update everyone on what the
problem ended up being. There is a problem with one of the power supplies
on the switch in the SAN. The other power supply was not plugged in, so it
halted everything occasionally. We plugged the other power supply in, and
PROTECTED]]
Sent: Friday, April 19, 2002 5:09 PM
To: Multiple recipients of list ORACLE-L
Subject: Re: EMC Storage Array Issue
Since I started this thread, I thought I'd update everyone on what the
problem ended up being. There is a problem with one of the power supplies
:
Sent by: Subject: Re: EMC Storage Array Issue
[EMAIL PROTECTED]
om
Hi Scott/All,
We have been able to identify the root cause for the issues we had with EMC
during the last 2 weeks. The root cause was an issue with EMC PowerPath in a SAN
environment where it was not able to resolve alternate paths. We are upgrading
from PowerPath Version 1.3 to Version 2.0
:[EMAIL PROTECTED]]
Sent: Monday, April 15, 2002 1:24 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: EMC Storage Array Issue
We ran into a similar issue on 8.1.6.0 for Solaris 32bit and Veritas
Volumes. Oracle noted this as a bug in their release and
suggest go to
8.1.6.3
] Quad/Tech International, Sussex, WI USA
-Original Message-
From: James A [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 15, 2002 1:24 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: EMC Storage Array Issue
We ran into a similar issue on 8.1.6.0 for Solaris
: EMC Storage Array Issue
We ran into a similar issue on 8.1.6.0 for Solaris 32bit and Veritas
Volumes. Oracle noted this as a bug in their release and
suggest go to
8.1.6.3 or better 8.1.7.3.
We are testing this now. So far it seems to work.
--
Please see the official ORACLE-L FAQ: http
PROTECTED] Quad/Tech
International, Sussex, WI USA
-Original Message-
From: James A [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 15, 2002 1:24 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: EMC Storage Array Issue
We ran into a similar issue on 8.1.6.0
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 [EMAIL PROTECTED]
Sent: Monday, April 15, 2002 5:33 PM
We have implemented a Sun Solaris Cluster (4 machines), connected
Hi Scott,
Recently we had issues with EMC. Last week we started getting IO timeout on
one of our frames followed by files being accessed disappearing. We lost
controlfiles, redo log files and library files. EMC hasn't been able to tell us
why it happended. I would like to hear about
Which filesystem/volume manager are you using, if any?
That is potentially where you would want to look if the async write
queue is getting backed up. Just shutting off async is a terrible
suggestion from EMC. I am suprised at them.
--
Jeremiah Wilton
http://www.speakeasy.net/~jwilton
On
Getting an error means having i/o problems. Disabling async_io and
increasing slaves means stopping the error but does not mean any performance
gain since there are io issues. I think they have to find and trace the time
out errors and try to fix them.
Are you using raw or cooked (i assume
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
Are you running Veritas as well? There are (I belive still outstanding)
bugs with VXFS/VXVM on Oracle which cause these errors. Also, are you
seeing high latency right times or experiencing 'hangs' in IO to your
symmetrix? I've also seen faulty fiber cabling cause this problem
(basically
Claudio,
All writes in Oracle are synchronous, they are just fired asynchronously. So
even the DBWR writes synchronously.
So individual writes are synchronously, they are just fired off
asynchronously.
Anjo Kolk.
claudio cutelli wrote:
Hi,
which background process had the problem?
because
We ran into a similar issue on 8.1.6.0 for Solaris 32bit and Veritas
Volumes. Oracle noted this as a bug in their release and suggest go to
8.1.6.3 or better 8.1.7.3.
We are testing this now. So far it seems to work.
-Original Message-
Canaan
Sent: Monday, April 15, 2002 11:34 AM
To:
On Monday, April 15, 2002, at 02:08 PM, Anjo Kolk wrote:
Claudio,
All writes in Oracle are synchronous, they are just fired
asynchronously. So
even the DBWR writes synchronously.
My dbw uses asynchronous writes I'm writing to qio files, which
means that they bypass buffer cache,
It seems silly to get into a semantic argument over this. My point was
that Oracle in fact does use asynchronous io as far as the POSIX
definition of aio. Just because the ocntrolling thread looks in on the
status of the aiocb when it is signaled upon completion doesn't make it
any less
18 matches
Mail list logo
