is lunix really limited to 32000 processes?
I've just bought a server with 1.5TB of RAM. At 1-2MB per process, that would be running a million processes. That might not make sense with only a few dozen cores, but running more than 2^15, or ~30k, processes, which, as far as I can tell is the current limit in Linux, must be useful sometimes. According to a part of something calling itself " The Open Group Base Specifications Issue 7" [0] (I'm not sure, but this may be stuff common to both the C and POSIX standards) : blksize_t , pid_t , and ssize_t shall be signed integer types. The relevant one is pid_t. It doesn't place a constraint on the size. What would break if we had a system with 32 or 64 bit signed pid_t ? (Is it common for client code to make wrong assumptions about this?) [0] https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_types.h.html What error do we currently get if the system runs out of pids? My basic idea is that the multi-user nature of the existing U...