shmget error - Mailing list pgsql-admin

Hi,

I am trying to run postgres on unixware2.1.2.
On starting the postmaster i am getting an error in shmget()...

IpcMemoryCreate: memKey=155356396 , size=760632 ,
        permission=384IpcMemoryCreate: shmget(..., create, ...)
        failed: Invalid argument

Postmaster only starts if started with option -B 1, but i cannot still
connect using pspl.

I wish to know what are the expected values of various IPC
parametes for postgresql and how should i set it for unixware kernel.

thanks,
yamini.