Use of cache=false and cost parameters | Solr Enterprise Search

Use of cache=false and cost parameters | Solr Enterprise Search

Parameter cache=false Setting the cache parameter to false we tell Solr not to cache current query results. This parameter can also be used as a filter query (fq) attribute, which tell Solr not to cache filter query results. What do we get from such behavior ? Let's imagine the following filter as a part of the query: fq={!frange l=10 u=100}log(sum(sqrt(popularity),100)) If we know that the queries with filter like the above one are rare, we can decide not to cache them and not change cache state for irrelevant data. To do that we add the cache=false attribute in the following way: fq={!frange l=10 u=100 cache=false}log(sum(sqrt(popularity),100)) As I told, adding this additional attribute will result in the filter results not being cached. Parameter cost The additional feature of Solr 3.4 is the possibility to set filter cost in case of those filters that we don't want to cache. Filter queries with specified cost are executed as last ones after all the cached filters.

Read full article from Use of cache=false and cost parameters | Solr Enterprise Search