On Mon, Nov 14, 2016 at 11:36 AM, domenico febbo <mimmopasticcio@xxxxxxxxx> wrote: > dear Pietro, > are you sure about > > effective_io_concurrency = 30 > > could you please explain the type of disk storage? fast storage can certainly utilize high settings of effective_io_concurrency at least in some cases...for example see: https://www.postgresql.org/message-id/CAHyXU0yiVvfQAnR9cyH%3DHWh1WbLRsioe%3DmzRJTHwtr%3D2azsTdQ%40mail.gmail.com merlin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance