Contents
What is MySQL profiling?
mysql> SET profiling = 1; SHOW PROFILES displays a list of the most recent statements sent to the server. The size of the list is controlled by the profiling_history_size session variable, which has a default value of 15. The maximum value is 100. Setting the value to 0 has the practical effect of disabling profiling.
How do I delete a profile in MySQL?
SET profiling=0; just disables logging of new data and doesn’t remove old stats.
How to set query profiling in MySQL client?
The SQL Profiler is built into the database server and can be dynamically enabled/disabled via the MySQL client utility. To begin profiling one or more SQL queries, simply issue the following command: mysql> set profiling=1; Query OK, 0 rows affected (0.00 sec) Two things happen once you issue this command.
How to enable or disable profiling in MySQL?
To control profiling, use the profiling session variable, which has a default value of 0 ( OFF ). Enable profiling by setting profiling to 1 or ON : Press CTRL+C to copy. mysql> SET profiling = 1; SHOW PROFILES displays a list of the most recent statements sent to the server.
Can a malformed statement be profiled in MySQL?
All statements are profiled except SHOW PROFILE and SHOW PROFILES, so neither of those statements appears in the profile list. Malformed statements are profiled. For example, SHOW PROFILING is an illegal statement, and a syntax error occurs if you try to execute it, but it shows up in the profiling list.
What does show profile do in MySQL 5.6?
SHOW PROFILE displays detailed information about a single statement. Without the FOR QUERY n clause, the output pertains to the most recently executed statement. If FOR QUERY n is included, SHOW PROFILE displays information for statement n. The values of n correspond to the Query_ID values displayed by SHOW PROFILES .