Re: database bloat,non removovable rows, slow query etc... [RESOLVED] - Mailing list pgsql-performance

Gregory Stark wrote:
> Tom Lane <tgl@sss.pgh.pa.us> writes:
>
> > Matteo Sgalaberni <sgala@sgala.com> writes:
> > > Good to know this...but why this behaviour? it'is lovely...:)
> >
> > Open transactions are tracked across the whole cluster.  This is
> > necessary when vacuuming shared catalogs.  In principle we could
> > track per-database xmin values as well, but the distributed overhead
> > that'd be added to *every* GetSnapshotData call is a bit worrisome.
>
> Don't we do that now in CVS (ie, in 8.2)?

No, we don't.

--
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.