The users table contains a row for each user who has connected to the MySQL server. For each user name, the table counts the current and total number of connections. The table size may be changed by modifying the performance_schema_users_size system variable at server startup. To disable user statistics, set this variable to 0.

The users table has the following columns. For a description of how the Performance Schema maintains rows in this table, including the effect of TRUNCATE TABLE, see Section 21.9.6, “Performance Schema Connection Tables”.

The users table was added in MySQL 5.6.3.