Hi
The worry about this is I had a PMR opened for this issue on my servers, which
are currently at 5.5.4. I was advised it's a known issue, refer to APAR
IC64438, and the recommended fix is to go to 5.5.5.0
So is 5.5.5.0 also having this issue with the log pinning?
I also believed this was happening in early versions of TSM v6.. But the later
builds are okay - can anyone confirm?
Richard Cheung | Server Engineer | Information Systems | Santos Limited
Santos Centre | 60 Flinders Street Adelaide SA 5000 Australia
Ph +61 8 8116 7125 | 7 Fax +61 8 8116 5073 | richard.cheung AT santos DOT com
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Dave Canan
Sent: Saturday, 14 May 2011 1:22 AM
To: ADSM-L AT VM.MARIST DOT 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.Loon AT klm DOT
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 AT VM.MARIST DOT EDU] On Behalf
> Of Richard Rhodes
> Sent: donderdag 12 mei 2011 15:04
> To: ADSM-L AT VM.MARIST DOT 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.Bos AT ATOSORIGIN DOT COM>
> To: ADSM-L AT VM.MARIST DOT 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 AT VM.MARIST DOT 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 AT VM.MARIST DOT EDU] namens Loon, EJ
> van
> -
> SPLXO [Eric-van.Loon AT KLM DOT COM]
> Verzonden: donderdag 12 mei 2011 11:11
> Aan: ADSM-L AT VM.MARIST DOT 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 AT VM.MARIST DOT EDU] On Behalf
> Of Paul Fielding
> Sent: woensdag 11 mei 2011 20:05
> To: ADSM-L AT VM.MARIST DOT 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.Loon AT klm DOT 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 AT VM.MARIST DOT EDU] On
> > Behalf
> Of
> > Robert Clark
> > Sent: woensdag 11 mei 2011 16:05
> > To: ADSM-L AT VM.MARIST DOT 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.Loon AT KLM DOT COM>
> > To: ADSM-L AT VM.MARIST DOT 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 AT VM.MARIST DOT 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
> > ********************************************************
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