Which is used to enable the query cache?
To set the size of the query cache, set the query_cache_size system variable. Setting it to 0 disables the query cache, as does setting query_cache_type=0 . By default, the query cache is disabled. This is achieved using a default size of 1M, with a default for query_cache_type of 0.
How do you cache database results?
One way is by caching the results of slow database queries. Caching involves storing the results of your database queries temporarily into memory. Subsequent attempts to query the database will use the stored data instead.
How many types of cache are there in Hibernate?
Hibernate uses two different caches for objects: first-level cache and second-level cache. If you have queries that run over and over, with the same parameters, query caching provides performance gains.
Do you have to cache the data before performing a query?
Queries apply only to currently cached data (and do not use the CacheLoader interface to retrieve additional data that may satisfy the query). Thus, the data set should be loaded entirely into cache before queries are performed.
How is coherence used to search for cache entries?
Coherence provides the ability to search for cache entries that meet a given set of criteria. The result set may be sorted if desired. Queries are evaluated with Read Committed isolation. Queries apply only to currently cached data (and do not use the CacheLoader interface to retrieve additional data that may satisfy the query).
How is data cached in a distributed application?
Distributed applications typically implement either or both of the following strategies when caching data: Using a private cache, where data is held locally on the computer that’s running an instance of an application or service. Using a shared cache, serving as a common source that can be accessed by multiple processes and machines.
What are the disadvantages of Database caching?
A major disadvantage is that among your applications, each node has its own resident cache working in a disconnected manner. The information stored within an individual cache node, whether its database cached data, web sessions or user shopping carts cannot be shared with other local caches.