Tory M Blue <tmb...@gmail.com> writes:
> Okay the one difference I see in settings is this little gem in 12..
> shared_memory_type mmap
Well, v12 is just exposing a switch for something that was hard-wired
before. But now I wonder if your 9.5 installation could've been compiled
to force it to use SysV shmem instead of POSIX. It would be pretty
unusual to have a system where the SysV shmem limits were higher than
the POSIX limits --- usually it's the other way 'round. But this'd
explain why you're seeing a difference.
Does v12 start with the higher shared_buffers setting if you
set shared_memory_type = sysv?
regards, tom lane
