Have you tried to resolve problem by "SETOPT LOGWARNFULLPERCENT 95" to avoid "Recovery log is at 84%, transactions will be delayed by 3ms" for some time. Maybe some slow sessions will be completed till log utilization reaches 95%?
Grigori G. Solonovitch -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Loon, EJ van - SPLXO Sent: Thursday, May 12, 2011 12:11 PM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] TSM Recovery log is pinning since upgrade to 5.5.5.0 code Hi Paul! We are already running 5.5.5.2 and the log is still filling up, even after switching from rollforward to normal mode. Management currently is questioning whether TSM is the right product for the future. Although I'm a big fan of TSM for 15 years, I'm really in doubt too... Kind regards, Eric van Loon KLM Royal Dutch Airlines -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Paul Fielding Sent: woensdag 11 mei 2011 20:05 To: ADSM-L@VM.MARIST.EDU Subject: Re: TSM Recovery log is pinning since upgrade to 5.5.5.0 code Hi folks, if this has already been commented on, my apologies, I hvaen't been following closely but just noticed this thread. We were experiencing log pinned issues after upgrading to 5.5.0.0 code at one of my client sites. What we were finding was that, occasionally, I'd get up in the morning and look at the server to see it completely bogged down with a huge number of backups still attempting to run, but nothing was moving - the log was at 84% (over it's trigger), and it had been firing off db backups for the last 4h to no avail, the log wasn't getting low enough. A key symptom was that in the actlog we were seeing messages to the effect of "Recovery log is at 84%, transactions will be delayed by 3ms" (or something like that). In opening a ticket, it was found there was an issue in the 5.5.0.0 code where, when the recovery log gets too full, it would start delaying transactions in order to prevent the log from filling too quickly. However, the side effect was that the pinning transaction would also get delayed, causing a bit of a never-ending loop. Transactions keep getting delayed, pinned transaction never gets to finish, and everything would just grind to a halt. I would have to halt the server and restart in order to get things back to normal. IBM recognized this as an issue and recommended going to any 5.5.5.0 level of code, where the problem was supposed to be fixed. I installed 5.5.5.2, and the problem has indeed gone away. It was supposed to be fixed at 5.5.5.0, though perhaps they didn't quite get it done at that code level as they hoped? I'd try installing 5.5.5.2 and see what happens.... regards, Paul On Wed, May 11, 2011 at 9:03 AM, Loon, EJ van - SPLXO <eric-van.l...@klm.com > wrote: > Hi Robert! > Thanks you very much for your reply! Several others on this list > reported this behavior and (as far as I know) three other users opened a > PMR too. I hope they have more luck, because I'm stuck. Level 2 keeps on > saying that the log keeps on growing because of slow running client > sessions. Indeed I see slow running client sessions, but they are slowed > down by the fact that TSM is delaying all transactions because the log > is used for more that 80% during a large part of the backup window! Now > they refuse to help me, unless I buy a Passport Advantage contract!!!!!! > Kind regards, > Eric van Loon > KLM Royal Dutch Airlines > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of > Robert Clark > Sent: woensdag 11 mei 2011 16:05 > To: ADSM-L@VM.MARIST.EDU > Subject: Re: TSM Recovery log is pinning since upgrade to 5.5.5.0 code > > I believe we've been seeing this problem as well. > > One night in the busiest backup period, I issued a "q actlog > begint=now-00:30", and got no results back but an error. > > I started dsmadmc -console on that server, and could see that the > console > output was most of an hour behind. (And the console output was scrolling > so fast that it could barely be read.) > > In that case, I think we determined that SQL LiteSpeed was set to some > rediculously small transaction size, and this was causing way too many > actlog entries. > > I think I also noted that the session number incremented by something > like > 100,000 in an hour. > > Asking the users of SQL LiteSpeed to make some changes was enough to > rememdy this problem, although we continue to fight with the logs > getting > full. > > Thanks, > [RC] > > > > From: "Loon, EJ van - SPLXO" <eric-van.l...@klm.com> > To: ADSM-L@VM.MARIST.EDU > Date: 05/11/2011 02:05 AM > Subject: Re: [ADSM-L] TSM Recovery log is pinning since upgrade > to > 5.5.5.0 code > Sent by: "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> > > > > Hi TSM-ers! > Here is a small follow up on my PMR about the recovery log utilization. > I'm at TSM level 2, still trying to convince them that there is > something broken in the TSM server code. To convince them, I have > changed the logmode to normal on one of my servers. I created a graph > (through TSMManager) which shows the recovery log utilization during > last night's client backup window and is doesn't differ much from the > night before, with logmode rollforward. When running in normal mode, TSM > should only use the recovery log for uncommitted transactions, so > utilization should be very low. My log is 12 Gb and the backuptrigger > value (75%) was still hit twice! > This clearly shows that there is something wrong with TSM, let's hope I > can convince Level 2 too, so my case gets forwarded to the lab. > I'll keep you guys posted! > Kind regards, > Eric van Loon > KLM Royal Dutch Airlines > ******************************************************** > For information, services and offers, please visit our web site: > http://www.klm.com. This e-mail and any attachment may contain > confidential and privileged material intended for the addressee only. 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