Stephen Frost <sfrost@xxxxxxxxxxx> writes: > * Laurenz Albe (laurenz.albe@xxxxxxxxxxx) 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
