Alvaro Herrera writes:
FWIW I think there's another problem with streaming replication here,
which is that most data flows from client to server, so it would take
quite some time for the threshold to be reached. Note that there's no
size check in the libpq frontend code. Normally this is not an issue
because the bulk of data is expected to flow in the other direction.
Huh? I thought the slaves connect to the master, rather than the other
way round?

It's true that libpq doesn't contain any such code, but that seems like
a fortunate thing right at the moment, as it limits the number of places
we might have to hack something.

regards, tom lane

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