petchimuthu lingam <spmlingam@xxxxxxxxx> schrieb: > Hi friends, > > I am using postgresql 8.1, I have shared_buffers = 50000, now i execute the > query, it takes 18 seconds to do sequential scan, when i reduced to 5000, it > takes one 10 seconds, Why. Wild guess: the second time the data are in the filesystem cache. > > Can anyone explain what is the reason, ( any other configuration is needed in > postgresql.conf) Show us the EXPLAIN ANALYSE - Output. Andreas -- Really, I'm not out to destroy Microsoft. That will just be a completely unintentional side effect. (Linus Torvalds) "If I was god, I would recompile penguin with --enable-fly." (unknow) Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889° - Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
