也就是i简单的打印参数变量的一个工具：
[root@mxqmongodb2 bin]# ./pt-mext -r -- mysqladmin ext -i10 -c3 -uroot -p123456 mysqladmin: [Warning] Using a password on the command line interface can be insecure. Aborted_clients 186 0 Aborted_connects 25 0 Binlog_cache_disk_use 7825 0 Binlog_cache_use 370259 10 Binlog_stmt_cache_disk_use 0 0 Binlog_stmt_cache_use 190 0 Bytes_received 3161980559 2455 Bytes_sent 22031458519 46977 Com_admin_commands 26714 10 Com_alter_db 0 0 Com_alter_db_upgrade 0 0 Com_alter_event 0 0 Com_alter_function 0 0 Com_alter_instance 0 0 Com_alter_procedure 0 0 Com_alter_server 0 0 Com_alter_table 26 0 Com_alter_tablespace 0 0 Com_alter_user 0 0 Com_analyze 8 0 Com_assign_to_keycache 0 0