On Fri, Aug 26, 2016 at 1:34 PM, Peter Eisentraut <peter.eisentr...@2ndquadrant.com> 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 can I do to > avoid it? What are the circumstances in practice where this issue would > arise, and what are the trade-offs? Where can I see existing snapshots > and how old they are?
I'll put something together to improve that. I think largely that will consist of references to other sections of the documentation, like MVCC, vacuuming, pg_stat_activity, etc. -- Kevin Grittner EDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers