Your client is at a 5.1.5 level. Is there any chance you could
post the results of an instrument detail trace to the listserv? The first
thought that comes to mind is possible disk fragmentation on the PST file
on the client side. This is just a guess, however. An intsrument detail
trace would give us a good place to start.


At 02:21 PM 10/2/2004 +0200, you wrote:

Hi TSM-ers ,

TSM server:     4.2.2.8 on IBM H50 with AIX 5.1 ML2, 1GB Memory, GigaBit
Ethernet, 3494 libary with 2x 3590 drives
TSM Client:     Windows 2000, TSM 5.1.5, 1.5GB Memory, Disks on IBM ESS

I backup big Outlook .PST Files directly to tape.
When TSM starts to backup big files (>300MB) I see on the AIX server
with topas a
throughput of up to 24M (readch/writech).
But in the middle of the file it drops to as low as 3000K.
CPU utilisation drops from 60% to 15%. No Wait at any time.

I'm not very familiar with performance on AIX because our TSM server was
bought as
a black box (kind of).

Has anyone seen this before?

Thanks in advance!

Thomas Rupp

Dave Canan
TSM Performance
IBM Advanced Technical Support
ddcanan AT us.ibm DOT com