On 5 May 2016 1:28 a.m., "Andres Freund" <and...@anarazel.de> wrote: > On 2016-05-04 18:22:27 -0400, Robert Haas wrote: > > How would the semantics change? > > Right now the time for computing the snapshot is relevant, if > maintenance of xids is moved, it'll likely be tied to the time xids are > assigned. That seems perfectly alright, but it'll change behaviour.
FWIW moving the maintenance to a clock tick process will not change user visible semantics in any significant way. The change could easily be made in the next release. Regards, Ants Aasma