What is the difference between Com_xxx and handler_xxx?
Com_delete is number of times a user sent DELETE command to MySQL.

Handler_delete is number of times MySQL server sent delete handler to a storage engine via internal API

To illustrate the difference here's an example:

mysql&gt; delete from t1 where id &lt; 100;
Query OK, 88 rows affected (0.00 sec)

mysql&gt; show status like 'Com_delete';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Com_delete    | 1     |
+---------------+-------+
1 row in set (0.00 sec)

mysql&gt; show status like 'Handler_delete';
+----------------+-------+
| Variable_name  | Value |
+----------------+-------+
| Handler_delete | 88    |
+----------------+-------+
1 row in set (0.00 sec)