We have seen this for quite a while with our TSM servers/Clients. The only thing we have found that works as a work around is to point our clients to back up directly to tape. If you are able to find a resolution to this issue please include me on the resolution as well as I would rather not write backup data directly to tape during backups.
Thanks, Andrew -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Dave Canan Sent: Friday, May 13, 2011 10:52 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] TSM Recovery log is pinning since upgrade to 5.5.5.0 code Andy Raibeck and I have been monitoring this thread for the past few weeks and have been having numerous discussions about what we need to do to address these problems. In addition, we have noted the many PMRs coming into the IBM support queue, and many of these PMRs are now on my queue. Andy will be assisting me along with other support people as needed. As part of this analysis we will be doing, we have a new questionnaire (titled "Items to Gather for a PMR with Log Pinning Condition for TSM V5") that customers will be filling out that ask several questions regarding your environment. We understand that this involves extra work to gather this information, but there can be many different areas that can cause log pinning conditions, so this information is needed. In addition, there will be a script provided (named serverperf5a.pl) that will help us gather additional data. Both of these will be provided to you by support. When these PMRs are now opened, please make sure that level 1 support adds the keyword LOGPIN55 to the PMR. This will allow Andy and I to quickly find all the PMRs being worked for this issue. Eric, your PMR is now one that I have on my queue (or I will shortly today). We will be contacting you to work the PMR. Dave Canan IBM ATS TSM Performance ddcananATUSDOTIBMDOTCOM 916-723-2410 On Thu, May 12, 2011 at 7:53 AM, Loon, EJ van - SPLXO <eric-van.l...@klm.com > wrote: > Hi Rick! > You are running in normal mode. In this mode the recovery log only > contains uncommited transactions. Don't you agree that in this case, the > log should NEVER reach 90%? It should not even reach something like 40%! > I don't want to have to implement extra monitoring to keep TSM from > crashing. It should just work. Like it did when we were running 5.3... > 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 > Richard Rhodes > Sent: donderdag 12 mei 2011 15:04 > To: ADSM-L@VM.MARIST.EDU > Subject: Re: TSM Recovery log is pinning since upgrade to 5.5.5.0 code > > I have a cron job that checks log utilization every 15m. If the log > goes > over 90% the scripts displays a bunch of stuff (q sess, q proc, q log, > show logpin, etc), runs a show logpin cancel, displays the stuff > again, > and finally emails me. (We run in normal mode.) It's been very > effective > in preventing a log full condition. > > rick > > > > > > > From: "Bos, Karel" <karel....@atosorigin.com> > To: ADSM-L@VM.MARIST.EDU > Date: 05/12/2011 06:11 AM > Subject: Re: 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, > > Dunno if u already looked at these options: THROUGHPUTDATATHRESHOLD and > THROUGHPUTTIMETHRESHOLD. After a couple of crashes due to log filling > up, > a couple of years back, I standard added them to all my clients (with > low > values to only kill the slowest/hung ones) and untill now never had any > issues with the V5.5 and below log space under normal backup loads. > > Log filling only happend when some sys admin made some changes to the > biggest file servers we had but even this was handled like it should be > done by ITSM. > > Regards, > > Karel > > > > ________________________________________ > Van: ADSM: Dist Stor Manager [ADSM-L@VM.MARIST.EDU] namens Loon, EJ van > - > SPLXO [eric-van.l...@klm.com] > Verzonden: donderdag 12 mei 2011 11:11 > Aan: ADSM-L@VM.MARIST.EDU > Onderwerp: Re: 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. 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