How can I clear the MySQL query cache without restarting the server?

Mitigating the MySQL Query Cache without Resuming the Server

Despite the increased performance offered by the MySQL query cache, occasions may arise when it needs to be cleared without disrupting server operations. Here are some methods to achieve this:

Resetting the Query Cache

If the user executing the command has reload privileges, the query cache can be explicitly dropped using the following command:

RESET QUERY CACHE;

Defragmenting the Query Cache

Alternatively, the query cache can be defragged using the following command:

FLUSH QUERY CACHE;

This process redistributes the cache's contents, potentially improving efficiency.

Additional Insights

Detailed guidance on query cache status and maintenance can be found in the MySQL manual:

[Query Cache Status and Maintenance](https://dev.mysql.com/doc/refman/8.0/en/query-cache-status-and-maintenance.html)

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