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An unexpected perf feature
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
PostgreSQL, I wish
Posted Aug 21, 2012 9:46 UTC (Tue) by andresfreund (subscriber, #69562)
Getting really seamless migration is still very, very hard.
Posted Aug 21, 2012 14:46 UTC (Tue) by Cyberax (✭ supporter ✭, #52523)
Posted Aug 21, 2012 15:27 UTC (Tue) by andresfreund (subscriber, #69562)
SR/HS work by replaying the wal from the primary on the standby. Unfortunately its format changed in at least each of the last 5 releases. Even 9.3 - with 9.2 being in beta atm - already has significant changes to the format.
> upgrade it (in-place upgrades are fast), let it catch up with the master
And unfortunately, while pg_upgrade upgrades are way much faster than the traditional pg_dump/pg_restore, they aren't that fast because they require the planner statistics to be rebuilt. A whole database analyze can take a bit on a larger database.
Don't get me wrong: I *really* like postgres. I really like SR/HS. I even like that pg_upgrade exists although the way it works isn't that elegant from my POV.
Unfortunately that doesn't make those features appear :(.
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