Re: [HACKERS] old_snapshot_threshold documentation

On Fri, Aug 26, 2016 at 1:34 PM, Peter Eisentraut wrote: > I doubt the documentation for old_snapshot_threshold is going to be > understood by many ordinary users. What is a "snapshot", first of all? > Why would a snapshot be old? Why is that a problem? What

[HACKERS] old_snapshot_threshold documentation

I doubt the documentation for old_snapshot_threshold is going to be understood by many ordinary users. What is a "snapshot", first of all? Why would a snapshot be old? Why is that a problem? What can I do to avoid it? What are the circumstances in practice where this issue would arise, and