The Slow Queries. Slow Query Log Overview. This table stores all the slow queries in the instance.
The slow query log consists of SQL statements that take more than long_query_time seconds to execute and require at least min_examined_row_limit rows to be examined. Having slow queries means your users are more likely to see spinners or loading screens instead of the information theyve requested. Use the command mysqldumpslow to analyze it and print summary of the slow query logfile.
Slow queries are those that take more time measured in seconds than they should based on the value stored in the server variable long_query_time.
By default this list is sorted by impact. It is typically obvious when a window is opened and a component takes time before database data is displayed. For example to print all slow queries that have already been recorded run the command. Debugging SQL and slow queries can help you resolve slowness issues in an instance.