"Ed L." <pgsql@bluepolka.net> writes:
> from /opt/pgsql/installs/postgresql-7.3.4/bin/postmaster
> (gdb) bt
> #0 0x12d288 in InitBufferPoolAccess ()
> from /opt/pgsql/installs/postgresql-7.3.4/bin/postmaster
> Error accessing memory address 0x0: Invalid argument.
Right offhand I'd imagine that the calloc() call failed and returned
NULL --- leastwise it's hard to see how else that routine could crash.
Could your machine be nearly out of memory?
regards, tom lane