The installers provided by Process-one do not include anything else than the most standard arquitecture. On Debian and probably other distributions there are 64bit binaries.
I compiled myself Erlang R10B-9 and ejabberd 1.0.0 on AMD64 with a 64 bit Linux 2.6.14 some time ago, and I found that the memory required increases, and even doubles, to the one required on 32bit. The performance did not improve so much anyway.
Only on some distributions
The installers provided by Process-one do not include anything else than the most standard arquitecture. On Debian and probably other distributions there are 64bit binaries.
I compiled myself Erlang R10B-9 and ejabberd 1.0.0 on AMD64 with a 64 bit Linux 2.6.14 some time ago, and I found that the memory required increases, and even doubles, to the one required on 32bit. The performance did not improve so much anyway.