Re: [ADSM-L] Multi-Core CPU usage on TSM Linux x86_64 server

2007-08-20 15:48:32
Subject: Re: [ADSM-L] Multi-Core CPU usage on TSM Linux x86_64 server
From: Andy Huebner <Andy.Huebner AT ALCONLABS DOT COM>
Date: Mon, 20 Aug 2007 14:44:50 -0500
What TSM processes are running during the spikes?  Is it a dedicated TSM

For example, if expiration is running and your DB is configured well, I
would expect 100% CPU utilization.  On the other hand, if migration is
running and you are seeing 100% CPU, I would start looking for a
hardware or driver problem.

Andy Huebner
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Zoltan Forray/AC/VCU
Sent: Monday, August 20, 2007 2:37 PM
Subject: [ADSM-L] Multi-Core CPU usage on TSM Linux x86_64 server

I realize that some of this has been discussed before, but I can seem to
find a thread on it and management is looking for

On our new, big, beefy Dell 2900 TSM server (8GB RAM, 2-Quad-Core Xeon
processors) , we are seeing some high CPU spikes and are wondering why.

Management wants to know, does the TSM server make good use of the
multi-core/cpu hardware?

Yes we realize that I/O is the main factor, especially with 225+
although the daily backup load is < 2TB)

This is TSM 5.4.0 x86_64 on RedHat 4.   Going to upgrade to 5.4.1 soon.

I have gone through all the various TSM tuning guides/slideshows and we
are set for all optimal/recommended values.  DBBuffsize is at 768MB
books I see talk about 1/8 to 1/2 of the memory, not to exceed 1GB). The
database is divided into 20GB chunks.

Zoltan Forray
Virginia Commonwealth University
Office of Technology Services
University Computing Center
e-mail: zforray AT vcu DOT edu
voice: 804-828-4807

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