Plenty of software manages to share information between processes without using SysV shared memory, and therefore being subject to these kernel resource limits.
I'm not saying this should necessarily be fixed - I'm sure the Postgres team has better things to be working on.
But it's not a natural, unavoidable limitation, either.
I'm not saying this should necessarily be fixed - I'm sure the Postgres team has better things to be working on.
But it's not a natural, unavoidable limitation, either.