I have the following config but increasing the shared buffers to a value greater then 32 doesn't let the database server start (I want a value of 256MB there because I will have a giant table of 12 million rows which will be qeuried extremely).
I have a 3GB RAM amd64 system running freebsd 6.1 with:
Maintenance_work_mem is 32MB Max_stack_depth is 3MB Shared_buffers is 32MB Temp_buffers is 8MB Work_mem is 32MB Max_fsm_pages is 204800 Max_connections is 3