Stephen Frost <sfrost@snowman.net> writes:
> * Laurenz Albe (laurenz.albe@cybertec.at) wrote:
>> Right, Slony is the way to go, since pg_upgrade doesn't support 8.3.
>> I would upgrade to a version more recent than 9.6.
> So... there's a bit of history here. pg_upgrade in 9.4 actually does
> support upgrading from 8.3.X. Support for upgrading from 8.3 was
> removed in 2209b3923a7afe0b6033ecfea972219df252ca8e.
Yeah. Also note that 8.3 to 9.6-or-newer is going to be a pretty
huge jump in terms of minor compatibility issues (have you read
all the relevant release notes?). So there's something to be said
for breaking this down into two steps: update to 9.4, test/fix
your applications against that, then make a second jump to something
current. Each of those jumps could be handled by the respective
version of pg_upgrade. I concur with Laurenz's advice that stopping
at 9.6 is probably not your best choice for a migration today.
regards, tom lane