Jan Wieck <[EMAIL PROTECTED]> writes: > On 6/12/2004 3:45 PM, Tom Lane wrote: >> I don't think it would help very much to define a bit like that --- I >> can't believe that very many pages would contain only frozen tuples, >> unless you were to adopt an aggressive policy of using VACUUM FREEZE >> a lot.
> I thought this implies an aggressive policy of freezing everything by > default. But I guess there is something I am not aware of that makes > aggressive freezing a bad thing. Well, it means extra I/O to freeze tuples that you otherwise probably never would. So it's not obvious that aggressive freezing in hopes of saving cycles later is a win. >> It might be interesting though to have some kind of "fast vacuum" mode >> that doesn't worry about freezing tuples, but only reclaiming dead ones. > Wouldn't that screw the current FSM population mechanisms? Not that my > suggestions above wouldn't do that either :-) Yeah, that's another "wholesale" mechanism that we'd have to look at refining. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings