ADSM-L

Re: Triggered dbbackup doesn't start immediately

2003-01-21 14:31:08
Subject: Re: Triggered dbbackup doesn't start immediately
From: "Seay, Paul" <seay_pd AT NAPTHEON DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 21 Jan 2003 14:29:48 -0500
Apparently, the BACKUP DB command does some pre processing now.  Not sure
what.  My system can take 3 to 5 minutes.  I think what is happening is some
log commit logic is running for a while to try to unpin as much of the log
as possible, but that is just a guess.  Then, my backup starts.  Mine are
not triggered backups, they are scheduled to occur before any significant
processing starts.

Paul D. Seay, Jr.
Technical Specialist
Naptheon Inc.
757-688-8180


-----Original Message-----
From: PAC Brion Arnaud [mailto:Arnaud.Brion AT PANALPINA DOT COM]
Sent: Monday, January 20, 2003 10:32 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Triggered dbbackup doesn't start immediately


Hi *SM'ers

I noticed an embarasting problem on our TSM server (4.2.3.1) : I defined a
Dbbackup trigger that should start a db backup as soon as our log reaches 70
% . What happens is that I see the backup triggerered, but that the
effective copy on tape only starts approximativeley 20 -25 minutes later,
sometimes leading to a server crash, due to log saturation (actual log size
: 12 GB). As far as I know a DB backup has the highest priority, so how can
it be that it "waits" so long before proceeding ? More confusing, Dbbackups
initiated manually or per schedule do not behave the same way : copy on tape
starts immediately ...

01/20/03 15:09:18 ANR4552I Full database backup triggered; started as
process 340. 01/20/03 15:46:23 ANR4554I Backed up 48128 of 4159601 database
pages.
01/20/03 15:46:53 ANR4554I Backed up 127536 of 4159601 database pages.
01/20/03 15:47:23 ANR4554I Backed up 206320 of 4159601 database pages.
Did anybody allready noticed such a behaviour, or have an explanation on
what could be happening there ? Thanks in advance ! Cheers. Arnaud

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