Hi,

before seriously looking into your HW-configuration and disk layout you
should rule out any paging space issues and lack of I/O-tuning. Check
paging space activity with "vmstat" or "nmon". Consistant activity to
and from paging space during dbbackup/expiration indicates you have a
memory/tuning problem and will drastically reduce performance.

Are you using files or raw volumes for your db, log and diskpools? Using
files increases the need for proper tuning.

Your other server performed OK? You should check if the OS-tuning is the
same on the new server. These are set in the file
/etc/tunables/nextboot.


Best of luck,


Hans C. Riksheim

 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Gill, Geoffrey L.
Sent: Friday, August 18, 2006 5:45 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: poor performance

Although I have an open issue with TSM and AIX support on poor
performance I was wondering if anyone might want to chime in on this
subject. This are taking way too long on a 4 processor system that took
1/3 the time on my 2 processor box. Db backups are 5+ hours on a 120gb
db that is 35% used.
Expiration is taking forever, backups are still running in the AM when I
get in.



Any thoughts from anyone?



TSM 5.3.3.0 on AIX 5.3



Thanks,



Geoff Gill

TSM Administrator

PeopleSoft Sr. Systems Administrator

SAIC M/S-G1b

(858)826-4062

Email:  <mailto:geoffrey.l.gill AT saic DOT com> geoffrey.l.gill AT saic DOT com