Hello,
ENV: OS/390 TSM 4.1

I have a question about Bufpoolsize..  From what I read it should be at least 
98%.
What is the impact if it's below this?  I'm currently at about 94% and 214MB 
Bufpoolsize.
All my backups complete within the backup window (over 1200 nodes).  I'm all 
for getting it to
98% but I need some justification as to how having a bufpoolsize below 98% is 
impacting performance.

Also, while I'm on the topic..
What about selftunebufpoolsize? I'm running on OS/390 and don't want to take 
all the available
memory by setting it to 'YES'.  Does anybody know what increments 
selftunebufpoolsize uses each time it
Makes an adjustment?
Is selftunebufpoolsize recommended for a 390 Env?

Is there any type of formula I can apply to the size of my database and 
calculate what my Bufpoolsize should be (ballpark)?
I've already increased it from 128000 to 214000 and made a whopping jump from 
93% to 94%.

Anybody want to share their bufpoolsize for their database of approx. 30GB 
(used pages)?

Anybody have some experience where increasing the Bufpoolsize helped a 
performance or any issue?

Thanks!
-Denis