55a64ab8_PHP__Statistics___Manual_mysqlnd_statistics__Result_Set_Description
[Statistic] explicit_free_result, implicit_free_result [Scope] Connection, Process (only during prepared statement cleanup) [Notes] The free is always considered explicit but for result sets created by an init command, for example, mysqli_options(MYSQLI_INIT_COMMAND , ...) [Description] 
Total number of freed result sets.
PHP: Statistics - Manual
Description