On Tue, Aug 27, 2019 at 9:45 PM Laurenz Albe <laurenz.a...@cybertec.at> wrote:
> Holtgrewe, Manuel wrote: > > Switching off fsync leads to a drastic time improvement but still > > higher wall-clock time for four threads. > > Don't do that unless you are ready to start from scratch with a new > "initdb" in the case of a crash. > > You can do almost as good by setting "synchronous_commit = off", > and that is crash-safe. It seems like it depends on your definition of crash-safe. Data loss can occur but not data corruption, right? Do you know any ballpark for how much difference in performance it makes to turn off synchronous_commit or what type of hardware or usage it would make the biggest (or least) difference?
