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When do you need to cache the results of a query?
The query results cache is effective when the exact same query is run multiple times in rapid succession and can tolerate returning slightly old data. However, some scenarios, like a live dashboard, require the most up-to-date results.
How does result set caching improve database performance?
When result set caching is enabled, dedicated SQL pool automatically caches query results in the user database for repetitive use. This allows subsequent query executions to get results directly from the persisted cache so recomputation is not needed. Result set caching improves query performance and reduces compute resource usage.
When to use order by in result set caching?
Some non-deterministic functions and runtime expressions can be deterministic to repetitive queries against the same data. For example, ROW_NUMBER (). Use ORDER BY in your query if the order/sequence of rows in the query result set is important to your application logic.
How to set query results cache Max age?
Set the query_results_cache_max_age option as part of the query to use the query results cache. You can set this option in the query text or as a client request property. For example: The option value is a timespan that indicates the maximum “age” of the results cache, measured from the query start time.
How to automatically cache function results in C #?
Another name for this automatic caching of function results is memoization. For a public interface, consider something along these lines: and simply use polymorphism to store T’s in a dictionary of object. Extending the delegate range could be implemented via currying and partial function application.
Which is a good name for automatic cache of function results?
In this case, the database trip would be expensive relative to the dictionary and there would almost always be exactly one ‘key’ value for the lookup, so it’s a good match. Another name for this automatic caching of function results is memoization. For a public interface, consider something along these lines:
What does the age of the cache mean?
The option value is a timespan that indicates the maximum “age” of the results cache, measured from the query start time. Beyond the set timespan, the cache entry is obsolete and won’t be used again.