Apache Solr Reference Guide Covering Apache Solr 6.0

the filterCache will be checked for a filter matching the query. For most situations, this is only useful if the
same search is requested often with different sort options and none of them ever use "score".
true
queryResultWindowSize
Used with the queryResultCache, this will cache a superset of the requested number of document IDs. For
example, if the a search in response to a particular query requests documents 10 through 19, and queryWindo
wSize is 50, documents 0 through 49 will be cached.
20
queryResultMaxDocsCached
This parameter sets the maximum number of documents to cache for any entry in the queryResultCache.
200
useColdSearcher
This setting controls whether search requests for which there is not a currently registered searcher should wait
for a new searcher to warm up (false) or proceed immediately (true). When set to "false", requests will block until
the searcher has warmed its caches.
false
maxWarmingSearchers
This parameter sets the maximum number of searchers that may be warming up in the background at any given
time. Exceeding this limit will raise an error. For read-only slaves, a value of two is reasonable. Masters should
probably be set a little higher.
2
Query-Related Listeners
As described in the section on Caches, new Index Searchers are cached. It's possible to use the triggers for
listeners to perform query-related tasks. The most common use of this is to define queries to further "warm" the
Index Searchers while they are starting. One benefit of this approach is that field caches are pre-populated for
faster sorting.
Good query selection is key with this type of listener. It's best to choose your most common and/or heaviest
queries and include not just the keywords used, but any other parameters such as sorting or filtering requests.
There are two types of events that can trigger a listener. A firstSearcher event occurs when a new searcher
is being prepared but there is no current registered searcher to handle requests or to gain auto-warming data
from (i.e., on Solr startup). A newSearcher event is fired whenever a new searcher is being prepared and there
is a current searcher handling requests.
The (commented out) examples below can be found in the solrconfig.xml file of the sample_techproduct
s_configs config set included with Solr, and demonstrate using the solr.QuerySenderListener class to
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