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The following page has been changed by FergusMcMenemie: http://wiki.apache.org/solr/FilterQueryGuidance The comment on the change is: adding more detail to explaination of fq ------------------------------------------------------------------------------ You should be familiar with the different caches Solr has in order to make informed decisions on filter usage. - You will then know that a filter query - results in a filter (implemented as a bit vector), - which is cached, - which means that it is the more useful the more often it is repeated. + You will then know that the first occurrence of a filter query results in a filter + (implemented as a bit vector), being cached within Solr. + A separate filter cache entry is made for each `fq` argument + in your query. Each `fq` involves a complete search of the index. + Now, what is a filter query? It is simply a part of a query that is factored out for special treatment.
