[wmanley]

WAL mode requires shared memory, so doesn’t work over the network.

mmap_size = 1TiB requires 1TiB of address space per connection. This is fine on 64-bit, unless you have millions of connections. Doesn’t work with 32-bit (4GiB) address space.

You want mmap_size to be greater than the size of your database. If you know your database will be small then you could set it to a smaller number, but you could still become address space constrained with many connections.