
             Description
             Truncates all summary tables within Performance Schema,
             resetting all aggregated instrumentation as a snapshot.
             Parameters
             in_verbose (BOOLEAN):
               Whether to print each TRUNCATE statement before running
             Example
             mysql> CALL sys.ps_truncate_all_tables(false);
             +---------------------+
             | summary             |
             +---------------------+
             | Truncated 44 tables |
             +---------------------+
             1 row in set (0.10 sec)
             Query OK, 0 rows affected (0.10 sec)
            