ADSM-L

Re: [ADSM-L] TSM Recovery log is pinning since upgrade to 5.5.5.0 code

2011-05-11 11:11:00
Subject: Re: [ADSM-L] TSM Recovery log is pinning since upgrade to 5.5.5.0 code
From: "Loon, EJ van - SPLXO" <Eric-van.Loon AT KLM DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 11 May 2011 17:03:20 +0200
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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e-mail or attachment is strictly prohibited, and may be unlawful. If you have 
received this e-mail by error, please notify the sender immediately by return 
e-mail, and delete this message. 

Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its 
employees shall not be liable for the incorrect or incomplete transmission of 
this e-mail or any attachments, nor responsible for any delay in receipt. 
Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch 
Airlines) is registered in Amstelveen, The Netherlands, with registered number 
33014286
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