Задержка репликации MariaDB

Я пытаюсь заставить репликацию работать между двумя серверами, на которых работает 64-разрядная версия MariaDB 10.1.7. База данных, которую я пытаюсь реплицировать, огромна, 520 ГБ, а экспорт / импорт на ведомом устройстве с отключенными автокоммитами занял 5 дней. Когда я изначально запускал репликацию, казалось, что раб догонит. На самом деле это выглядело очень многообещающе. К сожалению, через 30 минут, когда я снова проверил раб, я понял, что он действительно отстает. Спустя 1 неделю в ночное время, когда мастер был не так занят, действительно казалось, что он снова догоняет, но, к сожалению, сейчас Seconds_Behind_Master составляет почти 1 неделю. Я установил slave_parallel_mode на агрессивный, а на ведомом я установил slave_parallel_threads на 30, а на ведущем - на 10. Переменная innodb_flush_log_at_trx_commit равна 1 на ведомом устройстве и 0 на ведущем. Вот конфиг для мастера:

[client]
port          = 3306
socket        = /var/lib/mysql/mysqld.sock
[mysqld]
port          = 3306
socket        = /var/lib/mysql/mysqld.sock
log-error=/var/log/mysql/logs/mysql.log
datadir=/RAID50/innodb/mysql/
init-connect = 'SET NAMES UTF8'
character-set-server = utf8
server_id=1
sync_binlog=1
back_log = 50
max_connections = 450
max_connect_errors = 9999999
table_cache = 4096
max_allowed_packet = 16M
binlog_cache_size = 1M
max_binlog_size = 100M
max_heap_table_size = 64M
sort_buffer_size = 8M
join_buffer_size = 8M
thread_cache_size = 16
query_cache_size = 128M
query_cache_limit = 4M
query_alloc_block_size = 16K
expire_logs_days=14
# Set the default table type

event_scheduler=ON
default-storage-engine=InnoDB 
thread_stack = 192K
transaction_isolation = READ-COMMITTED
tmp_table_size = 64M
log-bin=/binlog/mysql/master-bin
# binary logging format - mixed recommended
binlog_format=mixed

slow_query_log_file=/var/log/mysql/logs/slow-queries.log
slow_query_log=1
long_query_time=1
tmpdir = /tmp 
slave_load_tmpdir = /var/log/mysql/tmpfs
innodb_additional_mem_pool_size = 32M

# This config file assumes a main memory of at least 8G
# innodb_buffer_pool_size = 6.5G    # Default setting
innodb_buffer_pool_size = 8G

# Set this option if you would like the InnoDB tablespace files to be
# stored in another location. By default this is the MySQL datadir.
innodb_file_per_table = 1
innodb_data_home_dir = /RAID50/innodb/mysql/
innodb_file_format = Barracuda
innodb_data_file_path = ibdata1:156M;ibdata2:156M:autoextend
# innodb_data_file_path = /data1/innodb/mysql/
innodb_autoextend_increment=156M


# Number of threads allowed inside the InnoDB kernel. The optimal value
# depends highly on the application, hardware as well as the OS
# scheduler properties. A too high value may lead to thread thrashing.
# innodb_thread_concurrency = 16
innodb_thread_concurrency = 32

innodb_flush_log_at_trx_commit = 0
innodb_log_buffer_size = 8M

# make sure the log files are large enough that you don't hold up
# checkpoints when the logs rotate!
innodb_log_file_size = 200M

# Total number of files in the log group. A value of 2-3 is usually good
# enough.
innodb_log_files_in_group = 2
innodb_log_group_home_dir = /var/log/mysql/innodb_logs
innodb_max_dirty_pages_pct = 80
# use directIO to bypass filesystem cache where possible
innodb_flush_method=O_DIRECT
innodb_lock_wait_timeout = 30
innodb_commit_concurrency=0
innodb_open_files=2000
[mysqldump]
# Do not buffer the whole result set in memory before writing it to
# file. Required for dumping very large tables
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

default-character-set = utf8

# Only allow UPDATEs and DELETEs that use keys.
#safe-updates

[isamchk]
key_buffer = 512M
sort_buffer_size = 512M
read_buffer = 8M
write_buffer = 8M
[myisamchk]
key_buffer = 512M
sort_buffer_size = 512M
read_buffer = 8M
write_buffer = 8M
[mysqlhotcopy]
interactive-timeout
[mysqld_safe]
# Increase the amount of open files allowed per process. Warning: Make
# sure you have set the global system limit high enough! The high value
# is required for a large number of opened tables
open-files-limit = 102400

Это файл конфигурации для ведомого устройства:

[mysqld]
datadir=/data1/mysql
socket=/var/lib/mysql/mysql.sock
# replication implementation
server-id=101
log-bin=mysql-bin
binlog_format=mixed
read-only=1
relay-log=mysql-relay-bin
log-slave-updates=1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd

init-connect = 'SET NAMES UTF8'
character-set-server = utf8
innodb_file_per_table = 1
innodb_file_format = Barracuda
innodb_data_file_path = ibdata1:156M;ibdata2:156M:autoextend
innodb_thread_concurrency = 32
innodb_flush_log_at_trx_commit = 0
innodb_log_buffer_size = 8M
innodb_log_file_size = 200M
innodb_log_files_in_group = 2
innodb_max_dirty_pages_pct = 80
innodb_flush_method=O_DIRECT
innodb_lock_wait_timeout = 30
innodb_commit_concurrency=0
innodb_open_files=2000
slave_parallel_threads = 10

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
open-files-limit = 102400

#
# include all files from the config directory
#
#!includedir /etc/my.cnf.d

Вот результат SHOW SLAVE STATUS \ G:

MariaDB [(none)]> SHOW SLAVE STATUS \G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.11.25
                  Master_User: replicant
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.005174
          Read_Master_Log_Pos: 86423579
               Relay_Log_File: mysql-relay-bin.000109
                Relay_Log_Pos: 77202510
        Relay_Master_Log_File: master-bin.005116
             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: 1932
                   Last_Error: Unable to load replication GTID slave state from mysql.gtid_slave_pos: Table 'mysql.gtid_slave_pos' doesn't exist in engine
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 77202221
              Relay_Log_Space: 6273918609
              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: 580994
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 1932
               Last_SQL_Error: Unable to load replication GTID slave state from mysql.gtid_slave_pos: Table 'mysql.gtid_slave_pos' doesn't exist in engine
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 1
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
                   Using_Gtid: No
                  Gtid_IO_Pos: 
      Replicate_Do_Domain_Ids: 
  Replicate_Ignore_Domain_Ids: 
                Parallel_Mode: aggressive
1 row in set (0.00 sec)

Я знаю о невозможности загрузить состояние подчиненного GTID репликации из mysql.gtid_slave_pos: Таблица mysql.gtid_slave_pos не существует в движке, и ее следует исправить, но я не уверен, является ли это причиной задержки репликации. Есть ли у кого-нибудь идеи, что я должен настроить? У подчиненного устройства процессор лучше, чем у главного.