On 05/06/2023 13:10, Bruce Momjian wrote:
nOn Mon, Jun 5, 2023 at 05:51:57PM +0300, Heikki Linnakangas wrote:
# Restart on crash
If a backend process crashes, postmaster terminates all other backends and
restarts the system. That's hard (impossible?) to do safely if everything
runs in one process. We can continue have a separate postmaster process that
just monitors the main process and restarts it on crash.
It would be good to know what new class of errors would cause server
restarts, e.g., memory allocation failures?
You mean "out of memory"? No, that would be horrible.
I don't think there would be any new class of errors that would cause
server restarts. In theory, having a separate address space for each
backend gives you some protection. In practice, there are a lot of
shared memory structures anyway that you can stomp over, and a segfault
or unexpected exit of any backend process causes postmaster to restart
the whole system anyway.
--
Heikki Linnakangas
Neon (https://neon.tech)
