Hi Why do standby servers not simply treat every checkpoint as a restartpoint? As I understand it, setting checkpoint_timeout and checkpoint_segments higher on a standby server effectively instruct standby servers to skip some checkpoints. Even with the same settings on both servers, the server could still choose to skip a checkpoint near the checkpoint_timeout limit due to the vagaries of time keeping (though I suppose it's very unlikely). But what could the advantage of skipping checkpoints be? Do people deliberately set hot standby machines up like this to trade a longer crash recover time for lower write IO?
I was wondering about this in the context of the recent multixact work, since such configurations could leave you with different SLRU files on disk which in some versions might change the behaviour in interesting ways. -- Thomas Munro http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
