Single Process Maximum Possible Memory in x64 Linux

Question

is there any memory limit for a single process in x64 Linux?

we are running a Linux Server with 32Gb of RAM and I\'m wondering if I can allocate most of it for a sin

Answer 1

Certain kernels have different limits, but on any modern 64-bit linux the single-process limit is still far over 32GB (assuming that process is a 64-bit executable). Various distributions may also have set per-process limits using sysctl, so you'll want to check your local environment to make sure that there aren't arbitrarily low limits set (also check ipcs -l on RPM-based systems).

The Debian port documentation for the AMD64 port specifically mentions that the per-process virtual address space limit is 128TiB (twice the physical memory limit), so that should be the reasonable upper bound you're working with.