You can turn off the dumping of shared memory with some unusably unfriendly bitwise arithmetic using the "coredump_filter" file in /proc for the process. (It's inherited by children, so you can just set it once for postmaster at server start time).
Yes Linux. This is very helpful, thanks. A follow-up question - will it take postgres a really long time to crash (and hopefully recover) if I have say 1T of RAM because it has to write that all out to a core file first?
