Hi, On 2020-04-21 07:18:20 -0400, Robert Haas wrote: > On Tue, Apr 21, 2020 at 2:44 AM Andres Freund <and...@anarazel.de> wrote: > > FWIW, I just tested pg_basebackup locally. > > > > Without compression and a stock postgres I get: > > unix tcp tcp+ssl: > > 1.74GiB/s 1.02GiB/s 699MiB/s > > > > That turns out to be bottlenecked by the backup manifest generation. > > Whoa. That's unexpected, at least for me. Is that because of the > CRC-32C overhead, or something else? What do you get with > --manifest-checksums=none?
It's all CRC overhead. I don't see a difference with --manifest-checksums=none anymore. We really should look for a better "fast" checksum. Regards, Andres
