MySQL主从管理的系统视图
2017-11-01 18:44
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在上一篇博客中我们进行了基于日志点的主从复制配置,现在我们来看一下MySQL主从管理过程中MySQL是如何进行操作的,以及涉及到的相关内容;
查看表performance_schema的内容
链路名称用来在多链路复制时区分不同的链路;
主从延迟用来设置复制过程中设置的主动延迟;
表replication_applier_status的内容
REMAINING_DELAY 是设置的主动延迟的时间;
表replication_applier_status_by_coordinator
表示多线程复制是控制器的情况
replication_applier_status_by_worker 多线程复制时的线程
上面只有一行数据,就是说只有一个线程在工作;
replication_connection_configuration
replication_connection_configuration
replication_connection_status
replication_group_member_stats
replication_group_members
查看表performance_schema的内容
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | softcentric | | sys | +--------------------+ 5 rows in set (0.00 sec) mysql> use performance_schema; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> show tables; +------------------------------------------------------+ | Tables_in_performance_schema | +------------------------------------------------------+ | accounts | | cond_instances | | events_stages_current | | events_stages_history | | events_stages_history_long | | events_stages_summary_by_account_by_event_name | | events_stages_summary_by_host_by_event_name | | events_stages_summary_by_thread_by_event_name | | events_stages_summary_by_user_by_event_name | | events_stages_summary_global_by_event_name | | events_statements_current | | events_statements_history | | events_statements_history_long | | events_statements_summary_by_account_by_event_name | | events_statements_summary_by_digest | | events_statements_summary_by_host_by_event_name | | events_statements_summary_by_program | | events_statements_summary_by_thread_by_event_name | | events_statements_summary_by_user_by_event_name | | events_statements_summary_global_by_event_name | | events_transactions_current | | events_transactions_history | | events_transactions_history_long | | events_transactions_summary_by_account_by_event_name | | events_transactions_summary_by_host_by_event_name | | events_transactions_summary_by_thread_by_event_name | | events_transactions_summary_by_user_by_event_name | | events_transactions_summary_global_by_event_name | | events_waits_current | | events_waits_history | | events_waits_history_long | | events_waits_summary_by_account_by_event_name | | events_waits_summary_by_host_by_event_name | | events_waits_summary_by_instance | | events_waits_summary_by_thread_by_event_name | | events_waits_summary_by_user_by_event_name | | events_waits_summary_global_by_event_name | | file_instances | | file_summary_by_event_name | | file_summary_by_instance | | global_status | | global_variables | | host_cache | | hosts | | memory_summary_by_account_by_event_name | | memory_summary_by_host_by_event_name | | memory_summary_by_thread_by_event_name | | memory_summary_by_user_by_event_name | | memory_summary_global_by_event_name | | metadata_locks | | mutex_instances | | objects_summary_global_by_type | | performance_timers | | prepared_statements_instances | | replication_applier_configuration | | replication_applier_status | | replication_applier_status_by_coordinator | | replication_applier_status_by_worker | | replication_connection_configuration | | replication_connection_status | | replication_group_member_stats | | replication_group_members | | rwlock_instances | | session_account_connect_attrs | | session_connect_attrs | | session_status | | session_variables | | setup_actors | | setup_consumers | | setup_instruments | | setup_objects | | setup_timers | | socket_instances | | socket_summary_by_event_name | | socket_summary_by_instance | | status_by_account | | status_by_host | | status_by_thread | | status_by_user | | table_handles | | table_io_waits_summary_by_index_usage | | table_io_waits_summary_by_table | | table_lock_waits_summary_by_table | | threads | | user_variables_by_thread | | users | | variables_by_thread | +------------------------------------------------------+ 87 rows in set (0.00 sec)
以replication开头的表都是我们进行主从管理的系统视图;
表replication_applier_configuration 的内容mysql> select * from replication_applier_configuration; +--------------+---------------+ | CHANNEL_NAME | DESIRED_DELAY | +--------------+---------------+ | | 0 | +--------------+---------------+ 1 row in set (0.00 sec) 链路名称 主从延迟
链路名称用来在多链路复制时区分不同的链路;
主从延迟用来设置复制过程中设置的主动延迟;
mysql> change master to master_delay=3600; #设置主动延迟
表replication_applier_status的内容
mysql> select * from replication_applier_status; +--------------+---------------+-----------------+----------------------------+ | CHANNEL_NAME | SERVICE_STATE | REMAINING_DELAY | COUNT_TRANSACTIONS_RETRIES | +--------------+---------------+-----------------+----------------------------+ | | ON | NULL | 0 | +--------------+---------------+-----------------+----------------------------+ 1 row in set (0.00 sec)
REMAINING_DELAY 是设置的主动延迟的时间;
表replication_applier_status_by_coordinator
表示多线程复制是控制器的情况
replication_applier_status_by_worker 多线程复制时的线程
mysql> select * from replication_applier_status_by_worker; +--------------+-----------+-----------+---------------+-----------------------+-------------------+--------------------+----------------------+ | CHANNEL_NAME | WORKER_ID | THREAD_ID | SERVICE_STATE | LAST_SEEN_TRANSACTION | LAST_ERROR_NUMBER | LAST_ERROR_MESSAGE | LAST_ERROR_TIMESTAMP | +--------------+-----------+-----------+---------------+-----------------------+-------------------+--------------------+----------------------+ | | 0 | 35 | ON | ANONYMOUS | 0 | | 0000-00-00 00:00:00 | +--------------+-----------+-----------+---------------+-----------------------+-------------------+--------------------+----------------------+ 1 row in set (0.00 sec)
上面只有一行数据,就是说只有一个线程在工作;
replication_connection_configuration
replication_connection_configuration
replication_connection_status
replication_group_member_stats
replication_group_members
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