something wrong when writing in my android client. if RAMDirectory do not help, i think the bottleneck is cpu. you may try to tune jvm but i do not expect much improvement. the best one is splitting your index into 2 or more smaller ones. you can then use solr s distributed searching. if the cpu is not fully used, yuo can do this in one physical machine
在 2012-5-22 上午8:50，"Li Li" <fancye...@gmail.com>写道： > > > 在 2012-5-22 凌晨4:59，"Yang" <teddyyyy...@gmail.com>写道： > > > > > I'm trying to make my search faster. right now a query like > > > > name:Joe Moe Pizza address:77 main street city:San Francisco > >is this a conjunction query or a disjunction query？ > > > in a index with 20mil such short business descriptions (total size about 3GB) takes about 100--200ms. > >20m is not a small size, how many results for a query in average？ > > > I profiled the query, most time is spent in TermScorer.score(), as is shown by the attached yourkit screenshot. > >that＇s true, for a query, matching and scoring is very time consuming and cpu intensive. another one is io for reading postings. > > > > > > > > > I tried loading the index onto tmpfs (in-memory block device), and also tried RAMDirectory, neither helps much. > >if that is true. it seems that io is not the > > I am reading http://www.cnlp.org/presentations/slides/AdvancedLuceneEU.pdf > > it mentions > > Size > > – Stopword removal > > – Stemming > > • Lucene has a number of stemmers available > > • Light versus Aggressive > > • May prevent fine-grained matches in some cases > > – Not a linear factor (usually) due to index compression > > > > so for "stopword removal", I'm already using the standard analyzer, so stop word removal is already included, right? > > > > also generally any other tricks to try for reducing the search latency? > > > > Thanks! > > Yang > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org
