On Wed, Feb 1, 2012 at 12:49 AM, Claudio Freire <klaussfreire@xxxxxxxxx> wrote: > On Wed, Feb 1, 2012 at 12:29 AM, Rosser Schwarz > <rosser.schwarz@xxxxxxxxx> wrote: >> Remember, DDL is transactional in PostgreSQL. In principle, you >> should be able to drop the index, do your inserts, and re-create the >> index without affecting concurrent users, if you do all of that inside >> an explicit transaction. Doing the inserts inside a transaction may >> speed them up, as well. > > Creating an index requires an update lock on the table, and an > exclusive lock on the system catalog. > Even though with "CONCURRENTLY" it's only for a short while. > So it does affect concurrent users. Forgot to mention that if you don't commit the drop, you see no performance increase. So: begin drop insert create commit Does not work to improve performance. At all. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
