On 2015-11-03 10:23:35 -0500, Robert Haas wrote: > On Mon, Nov 2, 2015 at 12:58 AM, Jeff Janes <jeff.ja...@gmail.com> wrote: > > If a transaction holding locks aborts on an otherwise idle server, perhaps > > it will take a very long time for a log-shipping standby to realize this. > > But I have hard time believing that anyone who cares about that would be > > using log-shipping (rather than streaming) anyway. > > I'm sure other people here understand this better than me, but I > wonder if it wouldn't make more sense to somehow log this data only if > something material has changed in the data being logged.
Phew. That doesn't seem easy to measure. I'm doubtful that it's worth comparing the snapshot and such, especially in the back branches. We could maybe add something that we only log a snapshot if XXX megabytes have been logged or something. But I don't know which number to pick here - and if there's other write activity the price of a snapshot record really isn't high. Andres -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers