MediaWiki:Smw-admin-statistics-querycache-legend

The cache statistics is to contain provisional cumulative as well as derived data including:
 * 'misses' as the total attempts to retrieve data from the cache with unattainable responses, forcing a direct repository (DB, triple-store etc.) retrieval
 * 'deletes' as the total amount of cache eviction operations (either through a purge or query dependency)
 * 'hits' contains the amount of cache retrievals from either embedded (queries called from within a wiki page) or non-embedded (if enabled, requested by pages like Special:Ask or the API) sources
 * 'medianRetrievalResponseTime' is an orientation value of the median response time (in sec.) for cached and non-cached retrieval requests over the time span of the collection process
 * 'noCache' indicates the amount of no attempt requests (limit=0 queries, 'no-cache' option etc.) to retrieve results from cache