nathanmascitelli(at)geotab(dot)com writes:
> I am running Postgres 9.4 on Windows Server 2012. I have had postgres crash
> a few times with the following error:
> FATAL: could not reattach to shared memory (key=00000000000000D0,
> addr=00000001405E0000): error code 1455
Hm, that's an odd one. According to
https://msdn.microsoft.com/en-us/library/windows/desktop/ms681385(v=vs.85).aspx
that is
ERROR_COMMITMENT_LIMIT
1455 (0x5AF)
The paging file is too small for this operation to complete.
which suggests that this is a resource-exhaustion type of problem.
How many backend processes are you trying to run concurrently,
and what else is running on the machine?
regards, tom lane