Jeff Janes <jeff.ja...@gmail.com> wrote: > But I do wonder what experience people have with the 3 stage > process, how useful is it empirically? If you can't open the > database for general use until the 3rd phase is done, then you > would just jump to doing that stage, rather than working through > all 3 of them. If you can open the database and muddle through > without statistics for a while, why not muddle through for the > little bit longer that it would take to collect the full set > right off the bat, rather than making intermediate passes?
It's not always a "little bit" of time. For a description of my experience with a home-grown 3 stage process before one was built into pg_upgrade, see this post: http://www.postgresql.org/message-id/1373465348.51692.yahoomail...@web162906.mail.bf1.yahoo.com Basically, we cut our down time from hours to minutes without serious impairment of performance. -- Kevin Grittner EDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
