Alexandre de Arruda Paes <adaldeia@xxxxxxxxx> wrote: > We did the following tests: > > 1) Postgresql 9.3 and Oracle 10 in a desktop machine(8 GB RAM, 1 SATA disk,Core i5) > 2) Postgresql 9.3 in a server + FC storage (128 GB RAM, Xeon 32 cores, SAS disks) That's only part of the information we would need to be able to give specific advice. Please read this page: https://wiki.postgresql.org/wiki/SlowQueryQuestions One possibility is that you are running with the default configuration, rather than having tuned for the hardware. You are very likely to need to adjust shared_buffers, effective_cache_size, work_mem, maintenance_work_mem, random_page_cost, cpu_tuple_cost, and (at least for the second machine) effective_io_concurrency. If the queries have a lot of joins you may need to increase from_collapse_limit and/or join_collapse_limit. You also may need to adjust [auto]vacuum and/or background writer settings. Various OS settings may matter, too. To get a handle on all this, it might be worth looking for Greg Smith's book on PostgreSQL high performance. -- Kevin Grittner EDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
