Can you share that workload? Diane Petersen wrote: > I also modified elevator=deadline but didn't see any change in fencing > behavior until increasing O2CB_HEARTBEAT_THRESHOLD to 16 (30 second > timeout). > > The issue we were seeing, fencing at precisely 5:15pm every Saturday > but we couldn't trace the problem to any specific event or activity > occurring at that time. However, we created test a job that was very > write intensive to the ocfs2 partition and were then able to crash the > nodes at will every time we ran this job. After making the above > change to the THRESHOLD neither one of the nodes has fenced/crashed > since. It's now been several weeks since making this change. > > Configuration: 2 node RAC cluster, EMC shared storage, Linux x86-64 > RH4 update 2, OCFS2, 10.2.0.2 database standard edition. > > Diane Petersen > Sr. Oracle DBA > ServerCare, Inc. > > */"Weller, Michael" <[EMAIL PROTECTED]>/* wrote: > > I don't know if I mentioned that to the list, elevator=deadline > and rising the THRESHOLD to 14 solved my self-fencing issues. > > (We'll see what happens under a possibly extreme load). > > Michael. > > --- > > Dr. Michael Weller > > ITZ Informationstechnologie GmbH > Consulting/Systemengineering > Bismarckstrasse 57 > D-45128 Essen > > Phone Office +49 201 24714 28 > FAX Office +49 201 24714 33 > Phone Mobile +49 172 2178078 > E-Mail mailto:[EMAIL PROTECTED] > > > -----Urspr�ngliche Nachricht----- > > Von: [EMAIL PROTECTED] [mailto:ocfs2-users- > > [EMAIL PROTECTED] Im Auftrag von Zunker, Christian > > Gesendet: Dienstag, 18. April 2006 15:21 > > An: [email protected] > > Betreff: Re: [Ocfs2-users] heartbeat write timeout > > > > Hi, > > > > I experienced the same problems. The elevator=deadline parameter > didn't > > help. But increasing the threshold to 60 did it. I think you could > > decrease the threshold, but didn't test it. In another posting, > it is said > > to take a timeout between 60 and 90 seconds. This would mean a > threshold > > between 31 and 46. > > > > I'll test this later. > > > > Best regards, > > Christian > > > > > > -----Urspr�ngliche Nachricht----- > > Von: [EMAIL PROTECTED] [mailto:ocfs2-users- > > [EMAIL PROTECTED] Im Auftrag von Weller, Michael > > Gesendet: Sonntag, 2. April 2006 14:18 > > An: Silviu Marin-Caea; [email protected] > > Betreff: Re: [Ocfs2-users] heartbeat write timeout > > > > Thx for the hints, I'll try that. > > > > With regards to the updates, while I generally agree, I can't > update the > > kernel here, because we'll loose vendor warranty in that case. I > know this > > is an odd concept, but that's how it works. We'll even loose Oracle > > support because the kernel update would void HP SAN-support. > > > > I mentioned SAN Failover, which for example does not work with > current > > kernel and current (even the not so current HP checked variant) > Qlogic > > driver. > > > > Anyway, I'll try your suggestions on monday and drop the list a > note if it > > worked. > > > > Thanks, > > Michael. > > > > --- > > > > Dr. Michael Weller > > > > ITZ Informationstechnologie GmbH > > Consulting/Systemengineering > > Bismarckstrasse 57 > > D-45128 Essen > > > > Phone Office +49 201 24714 28 > > FAX Office +49 201 24714 33 > > Phone Mobile +49 172 2178078 > > E-Mail mailto:[EMAIL PROTECTED] > > > -----Urspr�ngliche Nachricht----- > > > Von: [EMAIL PROTECTED] [mailto:ocfs2-users- > > > [EMAIL PROTECTED] Im Auftrag von Silviu Marin-Caea > > > Gesendet: Sonntag, 2. April 2006 08:26 > > > An: [email protected] > > > Betreff: Re: [Ocfs2-users] heartbeat write timeout > > > > > > On Saturday 01 April 2006 22:36, Weller, Michael wrote: > > > > > > > we are bound to SLES9SP3 (and EXACTLY that, nothing less, > not a patch > > > > more) > > > > > > Having latest updates does not hurt, on the contrary, it > helps. For > > > example, > > > the latest kernel has OCFS2 1.1.8, while the kernel from SP3 > has 1.1.7. > > > There are a number of bugfixes. > > > > > > SLES updates do really have a purpose. Apply them after > testing in a > > > non-production system. > > > > > > > It locks up immediately. Definitely nothing like a 12s timeout > > expires. > > > > > > It just looks like it's immediate, actually, the 12s do expire. > > > > > > > You mention a FAQ regarding some config option which I > didn't come > > > > across up to now, where can I find it? > > > > > > /boot/grub/menu.lst > > > > > > change elevator=cfq to elevator=deadline > > > > > > http://oss.oracle.com/projects/ocfs2/ > > > scroll down, look at the red text > > > > > > > Which options would you recommend to fix the problem or at > least make > > > > locks much less likely. > > > > > > You could also increase the timeout: > > > > > > /etc/sysconfig/o2cb > > > > > > # O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is > considered dead. > > > O2CB_HEARTBEAT_THRESHOLD=16 > > > > > > > > > _______________________________________________ > > > Ocfs2-users mailing list > > > [email protected] > > > http://oss.oracle.com/mailman/listinfo/ocfs2-users > > > > > > > > _______________________________________________ > > Ocfs2-users mailing list > > [email protected] > > http://oss.oracle.com/mailman/listinfo/ocfs2-users > > BEGIN:VCARD > VERSION:2.1 > N:Weller;Michael;;Dr. > FN:Michael Weller > ORG:ITZ Informationstechnologie GmbH;System Engineering. Internet > Security, VPN, IP-Routing, Switching, Unix, Linux > TITLE:Senior Consultant > NOTE;ENCODING=QUOTED-PRINTABLE:=0D=0A > TEL;WORK;VOICE:+49 2012471428 > TEL;CELL;VOICE:+49 1722178078 > TEL;WORK;FAX:+49 201 2471433 > ADR;WORK:;;Bismarckstra�e 57;Essen;;45128;Deutschland > LABEL;WORK;ENCODING=QUOTED-PRINTABLE:Bismarckstra=DFe > 57=0D=0AEssen 45128=0D=0ADeutschland > EMAIL;PREF;INTERNET:[EMAIL PROTECTED] > REV:20050221T135645Z > END:VCARD > _______________________________________________ > Ocfs2-users mailing list > [email protected] > http://oss.oracle.com/mailman/listinfo/ocfs2-users > > > ------------------------------------------------------------------------ > Yahoo! Messenger with Voice. 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