On 8/31/07, Alvaro Herrera <[EMAIL PROTECTED]> wrote: > > Pallav Kalva wrote: > > Tom Lane wrote: > > >> Probably represents freezing of old tuples, which is a WAL-logged > >> operation as of 8.2. Is it likely that the data is 200M transactions > >> old? > >> > > If nothing changed on these tables how can it freeze old tuples ? > > Does it mean that once it reaches 200M transactions it will do the same > > thing all over again ? > > No -- once tuples are frozen, they don't need freezing again (unless > they are modified by UPDATE or DELETE). > >
Off-topic question: the documentation says that XID numbers are 32 bit. Could the XID be 64 bit when running on a 64 bit platform? That would effectively prevent wrap-around issues. Regards MP
