ADSM-L

Re: TSM Long Restart Time

2005-01-11 10:59:13
Subject: Re: TSM Long Restart Time
From: "Hart, Charles" <charles.hart AT MEDTRONIC DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 11 Jan 2005 09:58:51 -0600
We say the same issue with versions 5.1.7.3 / 5.2.3. *Some 4.1 versions) Now @ 
5.2.3.5 and a 150GB DB takes about 45min... It use to take hours....

Regards,

Charles 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
Prather, Wanda
Sent: Tuesday, January 11, 2005 9:55 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: TSM Long Restart Time


That is very weird.
Whenever I've been waiting (in a panic, of course) for TSM to restart,
first thing I do is turn on iostat; I know that as long as the I/O is
running like crazy, TSM is still processing its log.  Once the I/O
stops, TSM is back up.
Have never just seen it sit and spin CPU like that.
And 35GB isn't very big, really.
If on a normal day your DB cache hit ratio is OK, I have no idea what
could be causing this.
I would ping very hard on Tivoli to get an answer, and keep raising the
priority on the problem until you get one. 
10 hours to restart is a SERIOUS availability problem!



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Andy Carlson
Sent: Monday, January 10, 2005 2:17 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: TSM Long Restart Time


Yes, thats about 600MB.  Expiration doesnt run too badly.  Expspeed says
we are doing about 2M pages per second.  It seems like TSM grabs one
CPU, runs it at 100%, and very little I/O is occurring during all this
time.  The DB is 90.3% of 35000MB, and the DB was reorged about 3 months
ago.

Prather, Wanda wrote:
> Wow.
> I thought 20 minutes was a long restart time!.
> Never heard of anything that bad before.
>
> How big is your DB?  Does your expirarion take a really long time to
> run?
>
> You are only applying about 600 MB of updates, yes?
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of
> Andy Carlson
> Sent: Monday, January 10, 2005 12:20 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: TSM Long Restart Time
>
>
> Wehave had a problem over the years with LONG TSM restart times if the
> recovery log has anything in it.  Here is what we are running:
>
> AIX 5.1 ML4+ Running on a P670, 4 Proc, 16GB Memory
> TSM 5.2.1.1
>
> We had an outage on one of our TSM instances Friday.  The log is
> currently in normal mode, 12GB in size.  It was 5.1% full.  The
restart
> took 10 hours!.  I have noticed this with various releases of TSM, so
> this is not new.  I talked to TSM about it before, and did not get any
> good answers.  Has anyone else seen anything like this?  Would Roll
> Forward DB mode help?  Thanks for any info.
>
> --
> Andy Carlson - Senior Technical Specialist
> BJC Healtcare
>
------------------------------------------------------------------------
> ---
> Gamecube:$150,PSO:$50,Broadband Adapter: $35, Hunters License:
> $8.95/month,
> The feeling of seeing the red box with the item you want in
> it:Priceless.
>
>
>


--
Andy Carlson - Senior Technical Specialist
BJC Healtcare
------------------------------------------------------------------------
---
Gamecube:$150,PSO:$50,Broadband Adapter: $35, Hunters License:
$8.95/month,
The feeling of seeing the red box with the item you want in
it:Priceless.

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