* Fujii Masao (masao.fu...@gmail.com) wrote: > On Sun, Jan 22, 2017 at 12:18 AM, Petr Jelinek > <petr.jeli...@2ndquadrant.com> wrote: > > On 21/01/17 11:39, Magnus Hagander wrote: > >> Is it time to enable checksums by default, and give initdb a switch to > >> turn it off instead? > > > > I'd like to see benchmark first, both in terms of CPU and in terms of > > produced WAL (=network traffic) given that it turns on logging of hint bits. > > +1 > > If the performance overhead by the checksums is really negligible, > we may be able to get rid of wal_log_hints parameter, as well.
Prior benchmarks showed it to be on the order of a few percent, as I recall, so I'm not sure that we can say it's negligible (and that's not why Magnus was proposing changing the default). Thanks! Stephen
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