| From: | Peter Geoghegan <pg(at)bowt(dot)ie> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Stephen Frost <sfrost(at)snowman(dot)net>, Michael Banck <michael(dot)banck(at)credativ(dot)de>, Michael Paquier <michael(at)paquier(dot)xyz>, PostgreSQL Development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: data_checksums enabled by default (was: Move --data-checksums to common options in initdb --help) |
| Date: | 2021-01-06 19:16:04 |
| Message-ID: | CAH2-Wzmxv0BOr1X2ZeS7w+30b9mV76isaXrMyYJvzCAp1k2LbQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Jan 6, 2021 at 9:55 AM Andres Freund <andres(at)anarazel(dot)de> wrote:
> Vacuum performance is one of *THE* major complaints about
> postgres. Making it run slower by a lot obviously exascerbates that
> problem significantly. I think it'd be prohibitively expensive if it
> were 1.5x, not to even speak of 15x.
+1. I am *strongly* opposed to enabling checksums by default for this
reason. I think that it's a total non-starter, unless and until the
overhead can be dramatically reduced. The fact that it isn't the fault
of the checksum mechanism in some abstract sense is 100% irrelevant.
--
Peter Geoghegan
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