SUN4, IPCS, two instances,....H.E.L.P!!

I cannot believe I am the first to try this...

Sun 4/ 490 server.. running Oracle 6.0.36.7.1 and attempting to bring Oracle 7 up.

Install script crashes with a complaint about the number of semaphores....
Take oracle 6 off line and oracle 7 plays..

ipcs -s returned:

IPC status from spcsed3 as of Mon May 17 14:56:08 1993 T ID KEY MODE OWNER GROUP Semaphores:
s 20 0x00000000 --ra-r----- oracle dba

When Oracle 7 was running same result

Question. Is oracle grabbing all of the available semaphores?

Question. Where can I find info about the default values for semmnu, semume, semmns and semmni?

Question. What is the method for determining the optimum values for these parameters?

Question. Is there anyone out there?

--
  |     .      *    +         S.T.A.R.S.         +    *      +    |
  |   *       +         My opinions are Mine   *    +             |
  |    If they belonged to someone else they wouldn't be mine!    | 
  |   suned1!lev_at_elroy.JPL.Nasa.Gov|lev_at_suned1.nswses.navy.mil    |