The Slow Query Log Is Written As. This variable can be used to specify the query execution time after which the query will be written to the slow query log. It happens all the time such as when a fellow engineer writes a query to search for all database records in existence without a filter.
The slow query log can be used to find queries that take a long time to execute and are therefore candidates for optimization. One way to configure the slow query log filename is to set the slow_query_log_file system variable. Unfortunately I dont have much experience working with slow queries.
Poorly written or expensive search queries.
If the log output destination is table then the logs will be written to the table mysqlslow_log. As an engineer slow query logs matter because when the application is non-responsive the slow logs tell me if a slow query is the culprit for slowing down the application. The execution time measured for the query is the real-time wall clock time it takes to execute the query. Parsing the slow log with tools such as EverSQL Query Optimizer will allow you to quickly locate the most common and slowest SQL queries in the database.