innodb - Mysql replication falling behind Update_rows_log_event::ha_update_row(-1) -


i managed (with here) setup replication master server running mysql 5.6 (centos 6) slave running mariadb 10.1.22 (centos 7).

my issue this, have server exact mariadb version , specs replication not catching up, instead increasing.

when started 48000 seconds behind , dropped 46000 after few minutes. after steadily increasing. atm of writing 48k seconds

show full processlist; shows sql thread spending 8 seconds running update_rows_log_event::ha_update_row(-1) back google search cannot find means.

mariadb [(none)]> show full processlist; +-----+------------------+---------------------------------------+--------------+---------+------+------------------------------------------+-----------------------+----------+ | id  | user             | host                                  | db           | command | time | state                                    | info                  | progress | +-----+------------------+---------------------------------------+--------------+---------+------+------------------------------------------+-----------------------+----------+ |   3 | system user      |                                       | null         | connect | 3640 | queueing master event relay log   | null                  |    0.000 | |   2 | system user      |                                       | null         | connect |    5 | update_rows_log_event::ha_update_row(-1) | null                  |    0.000 |

also caught simple update table set timestamp = now() static_ip = 'a-valid-ip' , process_id = '13217' taking 6 seconds while table has static_ip , process_id columns pk , command takes 0.078 seconds when executed directly.

contents of /etc/my.cnf 

[mysqld] max_allowed_packet =  1g max_connections = 600 thread_cache_size = 16 query_cache_size = 64m tmp_table_size= 512m max_heap_table_size= 512m wait_timeout=60  #innodb settings innodb_file_per_table=1 innodb_buffer_pool_size = 25g innodb_log_file_size = 2048m innodb_flush_log_at_trx_commit = 0 innodb_file_format = barracuda innodb_flush_neighbors = 0  #log  log-error =/var/log/error.log tmpdir = /dev/shm   #replication slave  server-id=6 slave-skip-errors=1062

my.cnf same server running ok except slave-id.

any suggestions/help on happening?

thank you.

from guys @ mariadb ha_update_rows not relevant , reason slowness dual disk failure on machine.

[root@ser3 ~]# dd if=/dev/zero of=/tmp/output conv=fdatasync bs=384k count=1k; 1024+0 records in 1024+0 records out 402653184 bytes (403 mb) copied, 43.1096 s, 9.3 mb/s

this ssd.


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