On Tue, Mar 29, 2005 at 03:33:24PM -0300, Vinicius Bernardi wrote: > > But now the problem starts when I has to select data from this > vehicles about the history ( I store only 2 months ) something like 40 > or 50 millions of data about 500 vehicles. > > Using the keys VEHICLE_ID and GPS_TIME, the perfomance is very low...
Please post an example query and the EXPLAIN ANALYZE output. The table definition might be useful too. > I need some ideas for a better perfomance in this table Do you have indexes where you need them? Do you cluster on any of the indexes? Do you VACUUM and ANALYZE the database regularly? Have you investigated whether you need to increase the statistics on any columns? Have you tuned postgresql.conf? What version of PostgreSQL are you using? -- Michael Fuhr http://www.fuhr.org/~mfuhr/ ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
