How do I cache a MySQL query?

MySQL determines the queries to cache by examining the query_cache_type variable. Setting this value to 0 or OFF prevents caching or retrieval of cached queries. You can also set it to 1 to enable caching for all queries except for ones beginning with the SELECT SQL_NO_CACHE statement.

How do I flush MySQL query cache?

With the FLUSH QUERY CACHE command you can defragment the query cache to better utilise its memory. This command will not remove any queries from the cache. FLUSH TABLES also flushes the query cache. The RESET QUERY CACHE command removes all query results from the query cache.

How do I enable MySQL 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.

Why is MySQL query cache deprecated?

The query cache has been disabled-by-default since MySQL 5.6 (2013) as it is known to not scale with high-throughput workloads on multi-core machines. We considered what improvements we could make to query cache versus optimizations that we could make which provide improvements to all workloads.

How is the execution plan cached in SQL Server?

The initial DMO for working with execution plans is sys.dm_exec_cached_plans. When a query is submitted, SQL Server checks the procedure cache for a matching execution plan. If one is not found, then SQL Server performs the query compilation and optimization to generate a new execution plan.

How does the query cache work in MySQL?

If you’d like more information about the MySQL query cache, read the following answer on Database Administrators / Stack Exchange and Percona’s blogpost The MySQL Query Cache: How it works, plus workload impacts. Note: MySQL query cache deprecated. MySQL query cache is deprecated as of MySQL 5.7.20, and is removed in MySQL 8.0. – mysql.com

How to flush the MySQL Query Cache unattended?

Learn how to flush the MyQL query cache unattended / automatic through a Linux cronjob, or on MySQL command prompt. Protip: Flushing the query cache with flush query cache does not delete or clear the query cache.

How to understand the query execution plan in MySQL?

Understanding the Query Execution Plan Optimizing Queries with EXPLAIN EXPLAIN Output Format Extended EXPLAIN Output Format Obtaining Execution Plan Information for a Named Connection Estimating Query Performance Controlling the Query Optimizer Controlling Query Plan Evaluation Switchable Optimizations