Wayne,
        We've had good luck running the ADSM database on a 7137-514 - we get
some wait times but nothing in the range you're seeing..   Have you
checked your cache hit ratio for your DB ??  It should be in the high
90's.  If not, increasing the bufpoolsize might alleviate some of the
wait times you're experiencing.


Regards...
Tim Pittson

>----------
>From:  Wayne Gorton[SMTP:wayneg AT AU1.IBM DOT COM]
>Reply To:      ADSM: Dist Stor Manager
>Sent:  Wednesday, October 01, 1997 10:05 PM
>To:    ADSM-L AT VM.MARIST DOT EDU
>Subject:       ADSM database performance.
>
>Howdy all,
>Has anyone looked at the ADSM database performance on an AIX SP/2 SMP node?
>In the past we have notice that the major bottle neck for backing up &
>restoring in the ADSM database. We have 10 database volume each 768Mb, they
>are
>mirrored on another disk. MirrorRead on the database is normal & MirrorWrite
>is
>Parallel. An iostat show 60-80% wait time on the database disks.
>
>Has anyone thought of using raw volumes or lots of little files spread over
>many disks vs. a lv over maximum disks?
>
>We are coming up to a reconfigure & it would be an ideal time to tune ADSM.
>
>Is there any performance tuning info for adsm?
>
>Role:                               Unix System Administrator
>Style:                              The Thinking Man's Clown
>Name:                               wayneg AT au1.ibm DOT com
>Life:       "Imagination is more important than knowledge"   Albert Einstein
>