Hi Laurenz Many thanks for your reply. Could you please bit more explain about the following sentence you wrote: There are no performance problems except the ones that always come with an index: INSERTs, UPDATEs and DELETEs will be slower and do more disk I/O and locking. Many Thanks -- View this message in context: http://postgresql.1045698.n5.nabble.com/PostgreSQL-index-issue-tp5716336p5716459.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general