Christian Rengstl a écrit : > My OS is Windows 2003 with 4GB Ram and Xeon Duo with 3.2 GHz; > shared_buffers is set to 32MB (as I read it should be fairly low on > Windows) and work_mem is set to 2500MB, but nevertheless the query takes > about 38 seconds to finish. The table "table1" contains approx. 3 > million tuples and table2 approx. 500.000 tuples. If anyone could give > an advice on either how to optimize the settings in postgresql.conf or > anything else to make this query run faster, I really would appreciate. > 32MB for shared_buffers seems really low to me but 2500MB for work_mem seems awfully high. The highest I've seen for work_mem was something like 128MB. I think the first thing you have to do is to really lower work_mem. Something like 64MB seems a better bet at first. Regards. -- Guillaume. http://www.postgresqlfr.org http://dalibo.com ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to majordomo@xxxxxxxxxxxxxx so that your message can get through to the mailing list cleanly
