Help:$smwgQueryResultCacheLifetime

is a configuration parameter that sets the cache lifetime of embedded queries and their results fetched from the query engine. It was introduced in .CiteRef::gh:smw:1251

Default setting
This means that by default lifetime of the query result cache is one week.

Changing the default setting
To modify the setting to this configuration parameter, add one of the following lines to your "LocalSettings.php" file after the  call:

This means that a query result is kept until it is being evictedCiteRef::docs.jboss.org:cacheeviction by another trigger. See the help page on query result caching for further information.
 * Disable forced query result updates

This means that a query result is kept for a day until it is being evictedCiteRef::docs.jboss.org:cacheeviction.
 * Shorten the cache lifetime to a day

This means that a query result is kept for a month until it is being evictedCiteRef::docs.jboss.org:cacheeviction.
 * Extend the cache lifetime to a month