* Michael Paquier (michael.paqu...@gmail.com) wrote: > On Fri, Jan 20, 2017 at 12:06 AM, Stephen Frost <sfr...@snowman.net> wrote: > > We did make the WAL checksum routines a lot > > faster with 9.6, as I recall, so perhaps there's been some change there > > too. > > 9.5, commit 5028f22f with Abhijit's and Heikki's work on CRC-32 computations.
Oh, was it 9.5 where we added the code to use CPU OPs to speed up the calculations..? If so then that surprises me a bit, as, if I recall correctly, I had a 9.5-based server where the replica simply couldn't keep up with replay and was entirely CPU-bound.. I had thought those changes went into 9.6. If they were in 9.5 then that's possibly a bit disappointing. Of course, this was a while ago, perhaps that was actually a 9.4 server.. mmm, will have to go find out. Thanks! Stephen
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