RE: RedHat GFS and 10g poor performance
- From: "Matthew Zito" <mzito@xxxxxxxxxxx>
- To: "Crisler, Jon" <Jon.Crisler@xxxxxxx>, "ORACLE-L" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 4 Feb 2009 10:48:33 -0500
Ok, well, just to save yourself time, you should grab the cluster.ccs
file, and any gfs-related log messages from the system logs. That can
help point out any misconfigurations you might be running into.
Matt
________________________________
From: Crisler, Jon [mailto:Jon.Crisler@xxxxxxx]
Sent: Wednesday, February 04, 2009 10:46 AM
To: Matthew Zito; ORACLE-L
Subject: RE: RedHat GFS and 10g poor performance
I will try to get that info for you- I am not familiar with GFS setup
but I am working with a bunch of sysadmins
________________________________
From: Matthew Zito [mailto:mzito@xxxxxxxxxxx]
Sent: Wednesday, February 04, 2009 10:39 AM
To: Crisler, Jon; ORACLE-L
Subject: RE: RedHat GFS and 10g poor performance
It's probably lock-related, if the SAN appears fine. What's your GULM
configuration look like?
Matt
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Crisler, Jon
Sent: Wednesday, February 04, 2009 10:32 AM
To: ORACLE-L
Subject: RedHat GFS and 10g poor performance
Subtitle- Tuning GFS for 10g ?
I am in the final testing stages of a RedHat 5.1 active / passive
cluster, using GFS and 10.2.0.4. The database is fairly large. I am
seeing very poor performance, apparently due to disk i/o issues and I
cannot pin it down to the cause. Its connected via 4gb SAN, and AWR is
reporting datafile service times that range from 10ms to over 80ms,
which is very poor. However, the backend SAN is reporting much better
service times.
Disk I/O seems to be far worse than a non-GFS system- perhaps up to 10
times worse. My feeling is that it is something odd with GFS. Has
anybody run into performance problem with 10g on GFS ?
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