Re: Pg-Upgrade standbys via rsync... and avoid sending UNlogged data?

* Bruce Momjian (bruce(at)momjian(dot)us) wrote:
> On Mon, Jul 25, 2016 at 12:34:45PM -0500, Jerry Sievers wrote:
> > Stephen Frost <sfrost(at)snowman(dot)net> writes:
> >
> > > * Stephen Frost (sfrost(at)snowman(dot)net) wrote:
> > >
> > >> > I have among others, a 5TB system w/about 40G of unlogged data.
> > >>
> > >> Honestly, sending an extra 40G out of 5TB (we're talking less than 1%
> > >> here...) might be worth it to keep the process simple.
> > >
> > > Of course, I realize right after sending this that you aren't sending
> > > the 5TB. :)
> >
> > Roger that! Really, the hard link pg-upgrade option and rsync method
> > for standbys is pure beauty :-)
> >
> > We have only the post-analyze and this unlogged data problem to deal
> > with.
> >
> > The warehouse is our only system with any substantial amount of unlogged
> > data.
> >
> > Reducing post-analyze delay was solved by me here with our groovy
> > threaded AnalyzMaTron. I can get a >5TB system done in about 45 minutes
> > w/20 threads.
>
> The only thing I can suggest is to document this limitation, if people
> think it is worth it.

It'd probably be good to document what happens with unlogged tables.

Thanks!

Stephen