create table t1 (i int);

create trigger tr1 after insert on t1 for each row set @a=@a+1;

create trigger tr2 after insert on t1 for each row set @a=@a+1;

create trigger tr3 after insert on t1 for each row set @a=@a+1;

flush status;

show status like 'Executed_triggers';

set @a=0;

insert into t1 values (1);

show status like 'Executed_triggers';

select @a;

drop table t1;

MariaDB [test]> show status like 'Executed_triggers';

+-------------------+-------+

| Variable_name     | Value |

+-------------------+-------+

| Executed_triggers | 1     |

+-------------------+-------+

1 row in set (0.00 sec)

MariaDB [test]> select @a;

+------+

| @a   |

+------+

|    3 |

+------+

1 row in set (0.00 sec)