MariaDB [(none)]> show processlist;
+----+-------------+---------------------+------------+---------+------+-----------------------------------------------+-----------------------------+----------+
| Id | User        | Host                | db         | Command | Time | State                                         | Info                        | Progress |
+----+-------------+---------------------+------------+---------+------+-----------------------------------------------+-----------------------------+----------+
|  3 | system user |                     | NULL       | Connect |   38 | Queueing master event to the relay log        | NULL                        |    0.000 |
|  4 | system user |                     | NULL       | Connect |   37 | Waiting for prior transaction to commit       | NULL                        |    0.000 |
|  5 | system user |                     | NULL       | Connect |   37 | Waiting for prior transaction to commit       | NULL                        |    0.000 |
|  6 | system user |                     | NULL       | Connect |   38 | Waiting for prior transaction to commit       | NULL                        |    0.000 |
|  7 | system user |                     | NULL       | Connect |   37 | Waiting for prior transaction to commit       | NULL                        |    0.000 |
|  8 | system user |                     | NULL       | Connect |   38 | Waiting for prior transaction to commit       | NULL                        |    0.000 |
|  9 | system user |                     | NULL       | Connect |   37 | Waiting for prior transaction to commit       | NULL                        |    0.000 |
| 10 | system user |                     | NULL       | Connect |   37 | Waiting for prior transaction to commit       | NULL                        |    0.000 |
| 11 | system user |                     | db37037    | Connect |   37 | Waiting for table metadata lock               | OPTIMIZE TABLE `wp_options` |    0.000 |
| 12 | system user |                     | NULL       | Connect |   37 | Waiting for room in worker thread event queue | NULL                        |    0.000 |
| 13 | maxmonitor  | 10.10.100.122:49218 | NULL       | Sleep   |    0 |                                               | NULL                        |    0.000 |
| 14 | root        | 10.9.9.76:57357     | SpotSystem | Sleep   |   38 |                                               | NULL                        |    0.000 |
| 15 | root        | localhost           | NULL       | Query   |    0 | init                                          | show processlist            |    0.000 |
+----+-------------+---------------------+------------+---------+------+-----------------------------------------------+-----------------------------+----------+


MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.16.1.1
                  Master_User: replication_user
                  Master_Port: 3306
                Connect_Retry: 10
              Master_Log_File: mysql-bin.005596
          Read_Master_Log_Pos: 84428512
               Relay_Log_File: relay-bin.000002
                Relay_Log_Pos: 693
        Relay_Master_Log_File: mysql-bin.005587
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB:
          Replicate_Ignore_DB:
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table:
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 0
                   Last_Error:
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 967647646
              Relay_Log_Space: 8781623025
              Until_Condition: None
               Until_Log_File:
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File:
           Master_SSL_CA_Path:
              Master_SSL_Cert:
            Master_SSL_Cipher:
               Master_SSL_Key:
        Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error:
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 1
               Master_SSL_Crl:
           Master_SSL_Crlpath:
                   Using_Gtid: Slave_Pos
                  Gtid_IO_Pos: 0-1-8706014502
      Replicate_Do_Domain_Ids:
  Replicate_Ignore_Domain_Ids:
                Parallel_Mode: optimistic
1 row in set (0.00 sec)

MariaDB [(none)]> select @@global.gtid_slave_pos;
+-------------------------+
| @@global.gtid_slave_pos |
+-------------------------+
| 0-1-8696229561          |
+-------------------------+
1 row in set (0.00 sec)

MariaDB [(none)]> select @@global.slave_parallel_threads;
+---------------------------------+
| @@global.slave_parallel_threads |
+---------------------------------+
|                               8 |
+---------------------------------+
1 row in set (0.00 sec)

MariaDB [(none)]> select @@global.slave_parallel_mode;
+------------------------------+
| @@global.slave_parallel_mode |
+------------------------------+
| optimistic                   |
+------------------------------+