Some questions: a) What operating system? b) What Java container (Tomcat/Jetty) c) What JAVA_OPTIONS? I.e. memory, garbage collection etc. d) Example queries? I.e. what features, how many facets, sort fields etc e) How do you load balance queries between the slaves? f) What is your search latency now and @ what QPS? Also, where do you measure time - on the API or on the end-user page? g) How often do you replicate? h) Are you using warm-up-queries? i) Are you ever optimizing your index? j) Are you using highlighting? If so, are you using the fast vector highlighter or the regex? k) What other search components are you using? i) Are you using RAID setup for the disks? If so, what kind of RAID, what stripe-size and block size?
Have you benchmarked to see what the bottleneck is, i.e. what is taking the most time? Try to add &debugQuery=true and share the <debug> section with us. It includes timings for each component. High latency could be caused by a number of different factors, and it is important to first isolate the bottleneck. -- Jan Høydahl, search solution architect Cominvent AS - www.cominvent.com Training in Europe - www.solrtraining.com On 18. aug. 2010, at 14.18, Muneeb Ali wrote: > > Hi All, > > I need some guidance over improving search response time for our catalog > search. we are using solr 1.4.0 version and have master/slave setup (3 > dedicated servers, one being the master and other two slaves). The server > specs are as follows: > > Quad Core 2.5Ghz 1333mhz > 12GB Ram > 2x250GB disks (SATA Enterprise HDD) > > Our 60GB index consists of 14million indexed documents. > > I have done some of the configuration tweaks from this list: > http://wiki.apache.org/lucene-java/ImproveSearchingSpeed > http://wiki.apache.org/lucene-java/ImproveSearchingSpeed , including merge > factor reduced to 6, minimizing number of stored fields, apart from hardware > suggestions. > > I would appreciate if anyone with similar background could shed some light > on upgrading hardware in our situation. Or if any other configuration tweak > that is not on the above list. > > Thanks, > > -Muneeb > -- > View this message in context: > http://lucene.472066.n3.nabble.com/improving-search-response-time-tp1204491p1204491.html > Sent from the Solr - User mailing list archive at Nabble.com.
