On 21/01/17 16:40, Stephen Frost wrote: > Petr, > > * 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. > > Benchmarking was done previously, but I don't think it's really all that > relevant, we should be checksum'ing by default because we care about the > data and it's hard to get checksums enabled on a running system. >
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I do think that performance implications are very relevant. And I haven't seen any serious benchmark that would incorporate all current differences between using and not using checksums. The change of wal_level was supported by benchmark, I think it's reasonable to ask for this to be as well. -- Petr Jelinek http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
