Query performance

From semantic-mediawiki.org

Settings that influence query features and performance implications.

 Has description
$smwg­Query­Result­Non­Embedded­Cache­LifetimeSets the cache lifetime of non-embedded queries and their results fetched from the query engine
$smwgExperimentalFeaturesSets experimental features
$smwgFixedPropertiesSets user defined properties to have a dedicated database table for them
$smwgQConceptFeaturesDefines which concept features should be available by default.
$smwgQEnabledActivates or deactivates all query related features and interfaces
$smwgQFeaturesDefines which query features should be available by default.
$smwgQFilterDuplicatesSets whether duplicate query conditions should be removed from computing query results
$smwgQueryResultCacheLifetimeSets the cache lifetime of embedded queries and their results fetched from the query engine
$smwgQueryResultCacheRefreshOnPurgeSets whether it is possible to manually refresh the query cache by doing a "purge" action
$smwgQueryResultCacheTypeSets whether the query result cache may be used
$smwgSparqlQFeaturesSets the SPARQL query features that are expected to be supported by the repository of the identifier (graph) of the SPARQL database
$smwgValueLookupCacheLifetimeSets the cache lifetime of the value lookup cache until it is being invalidated
$smwgValueLookupCacheTypeSets a separate cache type for the object cache when requesting value lookups from the database
$smwgValueLookupFeaturesSets which value lookup features should be served from value lookup cache

See also[edit]