På mandag 29. juni 2015 kl. 15:42:22, skrev Tom Lane <t...@sss.pgh.pa.us <mailto:t...@sss.pgh.pa.us>>: Andreas Joseph Krogh <andr...@visena.com> writes: > In the man-page for pg_upgrade we see this: > pg_upgrade will require a reindex if: > * an index is of type hash or GIN
I think that probably refers to some version-specific upgrade situations; I can't see a reason why it would be true in general. Bruce, doesn't that doc need improvement? regards, tom lane I'm specifically thinking about this (from 9.4 release-notes): E.5.3.1.1. Indexes <> * Reduce GIN <http://www.postgresql.org/docs/9.4/static/gin.html> index size (Alexander Korotkov, Heikki Linnakangas) Indexes upgraded via pg_upgrade <http://www.postgresql.org/docs/9.4/static/pgupgrade.html> will work fine but will still be in the old, largerGIN format. Use REINDEX <http://www.postgresql.org/docs/9.4/static/sql-reindex.html> to recreate old GIN indexes in the new format. It'd be great if pg_upgrade generated re-index scripts to make those indexes use the new format. -- Andreas Joseph Krogh CTO / Partner - Visena AS Mobile: +47 909 56 963 andr...@visena.com <mailto:andr...@visena.com> www.visena.com <https://www.visena.com> <https://www.visena.com>
