My initial response is to check for the obvious/frequent issues..

* Did you add the NET_BUFFER_SIZE to server and client?
* What's being backed up? Lots of small files in big directories are famous 
for causing _really_ slow backups - and I'm guessing you've only got 1 or 2 
drives in the U60?
* What's your tape media's required rate? If you're using LTO-2/3 drives, 
and feeding them at 2000kb/sec, you're going to have problems with them 
shoeshining.
* Is there a network bottleneck? Duplex or autonegotation issues?
* Is there a disk bottleneck? I'm a fan of "iostat -dxzcn". Look for high 
asvc_t times..

If there's nothing obvious wrong there, then you're best of turning up the 
debugging and looking at that. The link that Richard Mansell sent you is a 
good start, even on the Sun's, and the 6.0 planning and tuning guide goes 
into the same stuff, in more detail, and I believe most of it is still valid 
on a 5.0 system - in particular the wait & delay counters stuff.. 
http://support.veritas.com/docs/281842 is the link.

Regards,
    Tristan.

----- Original Message ----- 
From: "grant lowe" <glowe1957 AT yahoo DOT com>
To: <veritas-bu AT mailman.eng.auburn DOT edu>
Sent: Monday, April 24, 2006 8:39 AM
Subject: [Veritas-bu] Slow performance problem, cause unknown


> I"m having very poor performance on a Sun Ultra 60
> with Solaris 9 and NBU 5.0GA.  I've added the
> following files to the system with the asociated
> values:
>
> NET_BUFFER_SIZE = 65536
> NUMBER_DATA_BUFFERS = 32
> SIZE_DATA_BUFFERS = 262144
>
> My /etc/system has these parameters:
>
> set shmsys:shminfo_shmmax=33554432
> set shmsys:shminfo_shmmin=1
> set shmsys:shminfo_shmmni=512
> set shmsys:shminfo_shmseg=100
> set msgsys:msginfo_msgmap=512
> set msgsys:msginfo_msgmnb=65536
> set msgsys:msginfo_msgmni=1024
> set msgsys:msginfo_msgmax=8192
> set msgsys:msginfo_msgssz=32
> set msgsys:msginfo_msgseg=8192
> set msgsys:msginfo_msgtql=1024
> set semsys:seminfo_semmap=64
> set semsys:seminfo_semmni=2048
> set semsys:seminfo_semopm=128
> set semsys:seminfo_semmsl=300
> set semsys:seminfo_semmns=2048
> set semsys:seminfo_semmnu=1024
> set semsys:seminfo_semume=64
>
> So, why am I only getting a backup that starts at only
> 2000 KB/sec and then slows town to 300 KB/sec?  It may
> be an obvious answer, but I can't see it.
>
> Thanks for the help!
>
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