This article was first written in February 2004 for
the BeezNest technical website (http://glasnost.beeznest.org/articles/107)
The default values for Shared Memory in Sun's Solaris (starting from 2.6,  at least) are set too low to run.
Here is how to change it (see also 
PostgreSQL's Admin Guide, Managing  Kernel Ressources):
The relevant settings can be changed in /etc/system, for example:
set shmsys:shminfo_shmmax=0x2000000 set shmsys:shminfo_shmmin=1 set shmsys:shminfo_shmmni=256 set shmsys:shminfo_shmseg=256  set semsys:seminfo_semmap=256 set semsys:seminfo_semmni=512