Thanks for your reply. Our box is win server 2003 (32bits) and 6G RAM totally. Large heap (>2G) may not be helpful for JVM in 32bits box. Therefore we set JAVA_OPTIONS to "-Xms521m -Xmx1400m". Is my understanding right?
Thanks. >From: Lance Norskog <goks...@gmail.com> >Reply-To: solr-user@lucene.apache.org >To: solr-user@lucene.apache.org, newsam <new...@zju.edu.cn> >Subject: Re: Why the query performance is so different for queries? >Date: Wed, 29 Sep 2010 20:13:20 -0700 > >How much ram does the JVM have? > >Wildcard queries are slow. Starting with '*' are even slower. If you >want all values try "field:[* TO *]". This is a range query and lets >you pick a range of values- this picks everything. > >The "*:*" is not a wildcard. It is a magic syntax for "all documents" >and does not cause a search. > >2010/9/28 newsam : >> Hi guys, >> >> I have posted a thread "The search response time is too long". >> >> >> The SOLR searcher instance is deployed with Tomcat 5.5.21. >> . >> The index file is 8.2G. The doc num is 6110745. DELL Server has Intel(R) >> Xeon(TM) CPU (4 cores) 3.00GHZ and 6G RAM. >> >> In SOLR back-end, "query=key:*" costs almost 60s while "query=*:*" only >> needs 500ms. Another case is "query=product_name_title:*", which costs 7s. I >> am confused about the query performance. Do you have any suggestions? >> >> btw, the cache setting is as follows: >> >> filterCache: 256, 256, 0 >> queryResultCache: 1024, 512, 128 >> documentCache: 16384, 4096, n/a >> >> Thanks. >> >> >> > > > >-- >Lance Norskog >goks...@gmail.com >
