I don't think this has any direct influence on performance.
It was necessary to increase the default limits for larger shared_buffers, etc on pgsql prior to 9.3 where SysV shared memory was used, but this was common to many *nix operating systems.
It was necessary to increase the default limits for larger shared_buffers, etc on pgsql prior to 9.3 where SysV shared memory was used, but this was common to many *nix operating systems.