On Tue, 30 Mar 2004, Diogo Biazus wrote: > Hi folks, > > I have a database using tsearch2 to index 300 000 documents. > I've already have optimized the queries, and the database is vacuumed on > a daily basis. > The stat function tells me that my index has aprox. 460 000 unique words > (I'm using stemmer and a nice stopword list). 460 000 unique words is a lot ! Have you seen on them ? Sometimes it's very useful to analyze what did you indexed and do you want all of them. I suggest you to use ispell dictionary and, if you index numbers (look statistics), use special dictionaries for integer and decimal numbers http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/dicts/README.intdict > The problem is performance, some queries take more than 10 seconds to > execute, and I'm not sure if my bottleneck is memory or io. > The server is a Athlon XP 2000, HD ATA133, 1.5 GB RAM running postgresql > 7.4.3 over freebsd 5.0 with lots of shared buffers and sort_mem... > > Does anyone has an idea of a more cost eficient solution? > How to get a better performance without having to invest some > astronomicaly high amount of money? > > TIA, > > Regards, Oleg _____________________________________________________________ Oleg Bartunov, sci.researcher, hostmaster of AstroNet, Sternberg Astronomical Institute, Moscow University (Russia) Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/ phone: +007(095)939-16-83, +007(095)939-23-83 ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
