Using NHibernate Query Caching
NHibernate also provides a feature of query caching. Enabling query caching caches queries made by NHibernate to database, along with query result sets. Query caching makes use of second level cache to store queries, so that whenever the same query is needed to be executed again, it can be fetched from cache.
Any object retrieved as a result of query is cached to its respective regions, therefore objects must be marked as cacheable for efficient use of query caching. However, the query and primary keys of the result set are stored in a default query region named
Not every query's results remain the same for a period of time. Therefore, query caching should only be used with queries whose results are likely to be changed less frequently.
Enabling Query Caching
To enable query caching, add the following property in NHibernate configuration
Enabling query cache does not cache each query by default. Instead queries
needed to be cached are to be set cacheable in code. To set a query cacheable,
SetCacheable(true) function of query while creating query, e.g.,
IQuery qry = session.CreateQuery("from Customer c").SetCacheable(true);