涉及到复制和二进制日志中的选项和变量-Replication and Binary Logging Options and Variables

Posted 2020-09-02 熊出陌

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了涉及到复制和二进制日志中的选项和变量-Replication and Binary Logging Options and Variables相关的知识，希望对你有一定的参考价值。

在搭建复制中，有些参数需要我们留意，在这里罗列出来，供大家参考一下，以GTID为基础

--server-id

server-id：这是一个全局的可动态调整的变量，取值范围为0-4294967295,也就是2的32次方减1，这个选项必须在master和slave中都分别进行设置，如果不设置保持默认，则在连接过程中会产生错误。从而复制失败，将这个参数配置在my.cnf配置文件中，然后重启生效

　　2. --server_uuid

server_uuid:这是一个全局只读的变量，非动态变量，以一个字符串的形式存在

+---------------+--------------------------------------+
| Variable_name | Value                                |
+---------------+--------------------------------------+
| server_uuid   | a0c06ec7-fef0-11e6-9f85-525400a7d662 |
+---------------+--------------------------------------+
1 row in set (0.00 sec)

这个字符串，在服务器启动的时候，是直接去读数据目录中的auto.cnf文件，即

[[email protected]01 ~]# cat /data/mysql/mysql3306/data/auto.cnf 
[auto]
server-uuid=a0c06ec7-fef0-11e6-9f85-525400a7d662

可以看到，跟客户端查出来的是等值的。如果auto.cnf文件并不存在的时候，则会生成一个新的UUID，同时创建auto.cnf文件,这个文件属于自动生成，不要去写或者更改里面的内容，在SLAVE端开始start slave后，用SHOW SLAVE STATUS可查看到MASTER的UUID，而在MASTER中，使用SHOW SLAVE HOTS可查看SLAVE中的UUID

　　3. 变量大杂烩---参数众多，直接从官网拷贝下来

Option or Variable Name
Command Line	System Variable	Status Variable
Option File	Scope	Dynamic
Notes
`abort-slave-event-count`
Yes	No	No
Yes		No
DESCRIPTION: Option used by mysql-test for debugging and testing of replication mysql-test用于调试和测试复制的选项
`binlog_gtid_simple_recovery`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Controls how binary logs are iterated during GTID recovery 控制GTID在恢复期间如何迭代二进制日志
`Com_change_master`
No	No	Yes
No	Both	No
DESCRIPTION: Count of CHANGE MASTER TO statements change master to 语句的统计
`Com_show_master_status`
No	No	Yes
No	Both	No
DESCRIPTION: Count of SHOW MASTER STATUS statements SHOW MASTER STATUS语句统计
`Com_show_new_master`
No	No	Yes
No	Both	No
DESCRIPTION: Count of SHOW NEW MASTER statements SHOW NEW MASTER 语句的统计
`Com_show_slave_hosts`
No	No	Yes
No	Both	No
DESCRIPTION: Count of SHOW SLAVE HOSTS statements SHOW SALVE HOSTS语句的统计
`Com_show_slave_status`
No	No	Yes
No	Both	No
DESCRIPTION: Count of SHOW SLAVE STATUS statements SHOW SALVE STATUS 语句统计
`Com_show_slave_status_nonblocking`
No	No	Yes
No	Both	No
DESCRIPTION: Count of SHOW SLAVE STATUS NONBLOCKING statements SHOW SLAVE STATUS NONBLOCKING 语句统计
`Com_slave_start`
No	No	Yes
No	Both	No
DESCRIPTION: Count of START SLAVE statements START SLAVE 语句统计
`Com_slave_stop`
No	No	Yes
No	Both	No
DESCRIPTION: Count of STOP SLAVE statements STOP SALVE语句统计
`disconnect-slave-event-count`
Yes	No	No
Yes		No
DESCRIPTION: Option used by mysql-test for debugging and testing of replication mysql-test用于调试和测试复制的选项
`enforce-gtid-consistency`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Prevents execution of statements that cannot be logged in a transactionally safe manner 防止不能以事务安全方式记录的执行语句
`enforce_gtid_consistency`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Prevents execution of statements that cannot be logged in a transactionally safe manner 防止不能以事务安全方式记录的执行语句
`executed-gtids-compression-period`
Yes	No	No
Yes		No
DESCRIPTION: Deprecated and will be removed in a future version. Use the renamed gtid-executed-compression-period instead.在后期版本将被弃用，使用重命名的gtid-executed-compression-period 代替
`executed_gtids_compression_period`
No	Yes	No
No	Global	Yes
DESCRIPTION: Deprecated and will be removed in a future version. Use the renamed gtid_executed_compression_period instead. 在后期版本将被弃用，使用重命名的gtid-executed-compression-period 代替
`gtid-executed-compression-period`
Yes	No	No
Yes		No
DESCRIPTION: Compress gtid_executed table each time this many transactions have occurred. 0 means never compress this table. Applies only when binary logging is disabled. 每次发生此很多事务时压缩gtid_executed表。 0表示不压缩此表。仅在禁用二进制日志记录时应用。
`gtid-mode`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Controls whether GTID based logging is enabled and what type of transactions the logs can contain 控制是否启用基于GTID的日志记录以及日志可包含的事务类型
`gtid_executed`
No	Yes	No
No	Global	No
DESCRIPTION: Global: All GTIDs in the binary log (global) or current transaction (session). Read-only.全局：二进制日志（全局）或当前事务（会话）中的所有GTID。只读。
`gtid_executed_compression_period`
No	Yes	No
No	Global	Yes
DESCRIPTION: Compress gtid_executed table each time this many transactions have occurred. 0 means never compress this table. Applies only when binary logging is disabled.每次发生此很多事务时压缩gtid_executed表。 0表示不压缩此表。仅在禁用二进制日志记录时应用。
`gtid_mode`
No	Yes	No
No	Global	Yes
DESCRIPTION: Controls whether GTID based logging is enabled and what type of transactions the logs can contain控制是否启用基于GTID的日志记录以及日志可包含的事务类型
`gtid_next`
No	Yes	No
No	Session	Yes
DESCRIPTION: Specifies the GTID for the next statement to execute. See documentation for details.指定要执行的下一个语句的GTID。有关详细信息，请参阅文档。
`gtid_owned`
No	Yes	No
No	Both	No
DESCRIPTION: The set of GTIDs owned by this client (session), or by all clients, together with the thread ID of the owner (global). Read-only.此客户端（会话）拥有的一组GTID或所有客户端拥有的GTID以及所有者的线程ID（全局）。只读。
`gtid_purged`
No	Yes	No
No	Global	Yes
DESCRIPTION: The set of all GTIDs that have been purged from the binary log.从二进制日志中清除的所有GTID的集合
`init_slave`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Statements that are executed when a slave connects to a master SLAVE连接到MASTER时执行语句
`log-slave-updates`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Tells the slave to log the updates performed by its SQL thread to its own binary log 告诉SLAVE将其SQL线程执行的更新记录到自己的二进制日志中
`log_slave_updates`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Whether the slave should log the updates performed by its SQL thread to its own binary log. Read-only; set using the --log-slave-updates server option.SLAVE是否应该将其SQL线程执行的更新记录到自己的二进制日志中。只读; 使用--log-slave-updates服务器选项设置。
`log_statements_unsafe_for_binlog`
No	Yes	No
No	Global	Yes
DESCRIPTION: Disables error 1592 warnings being written to the error log 禁用1592错误警告写入到错误日志中
`master-info-file`
Yes	No	No
Yes		No
DESCRIPTION: The location and name of the file that remembers the master and where the I/O replication thread is in the master‘s binary logs记录主节点的文件的位置和名称，以及I / O复制线程在主节点二进制日志中的位置和名称
`master-info-repository`
Yes	No	No
Yes		No
DESCRIPTION: Whether to write master status information and replication I/O thread location in the master‘s binary logs to a file or table.是否将主状态信息和主机二进制日志中的复制I / O线程位置写入文件或表。
`master-retry-count`
Yes	No	No
Yes		No
DESCRIPTION: Number of tries the slave makes to connect to the master before giving up 在断开之前SLAVE连接到MASTER的尝试次数
`master_info_repository`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Whether to write master status information and replication I/O thread location in the master‘s binary logs to a file or table是否将主状态信息和主机二进制日志中的复制I / O线程位置写入文件或表。
`relay-log`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: The location and base name to use for relay logs 用于中继日志的位置和基本名称
`relay-log-index`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: The location and name to use for the file that keeps a list of the last relay logs 用于保存最后一个中继日志列表的文件的位置和名称
`relay-log-info-file`
Yes	No	No
Yes		No
DESCRIPTION: The location and name of the file that remembers where the SQL replication thread is in the relay logs 记录SQL复制线程在中继日志中的位置和文件名称
`relay-log-info-repository`
Yes	No	No
Yes		No
DESCRIPTION: Whether to write the replication SQL thread‘s location in the relay logs to a file or a table. 是否将中继日志中的复制SQL线程的位置写入文件或表。
`relay-log-recovery`
Yes	No	No
Yes		No
DESCRIPTION: Enables automatic recovery of relay log files from master at startup 在启动时启用从master自动恢复中继日志文件
`relay_log_basename`
No	Yes	No
No	Global	No
DESCRIPTION: Complete path to relay log, including filename 完整中继日志的路径，包括文件名
`relay_log_index`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: The name of the relay log index file 中继日志索引文件的名字
`relay_log_info_file`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: The name of the file in which the slave records information about the relay logs slave记录有关中继日志信息的文件名字
`relay_log_info_repository`
No	Yes	No
No	Global	Yes
DESCRIPTION: Whether to write the replication SQL thread‘s location in the relay logs to a file or a table 是否将中继日志中的复制SQL线程的位置写入文件或表。
`relay_log_purge`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Determines whether relay logs are purged 确定是否清除中继日志
`relay_log_recovery`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Whether automatic recovery of relay log files from master at startup is enabled; must be enabled for a crash-safe slave.是否启用从master自动恢复中继日志文件; 必须为crash-safe slave启用
`relay_log_space_limit`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Maximum space to use for all relay logs 对于所有的中继日志使用的最大空间
`replicate-do-db`
Yes	No	No
Yes		No
DESCRIPTION: Tells the slave SQL thread to restrict replication to the specified database 指示SLAVE SQL线程将复制限制到指定的数据库
`replicate-do-table`
Yes	No	No
Yes		No
DESCRIPTION: Tells the slave SQL thread to restrict replication to the specified table 指示SLAVE SQL线程将复制限制指定到表
`replicate-ignore-db`
Yes	No	No
Yes		No
DESCRIPTION: Tells the slave SQL thread not to replicate to the specified database 告诉SLAVE SQL 线程不要复制到指定的数据库
`replicate-ignore-table`
Yes	No	No
Yes		No
DESCRIPTION: Tells the slave SQL thread not to replicate to the specified table 告诉SLAVE SQL线程不要复制指定的表
`replicate-rewrite-db`
Yes	No	No
Yes		No
DESCRIPTION: Updates to a database with a different name than the original 使用与原始名称不同的名称更新数据库
`replicate-same-server-id`
Yes	No	No
Yes		No
DESCRIPTION: In replication, if set to 1, do not skip events having our server id 在复制中，如果设置为1，则不要跳过具有我们的服务器标识的事件
`replicate-wild-do-table`
Yes	No	No
Yes		No
DESCRIPTION: Tells the slave thread to restrict replication to the tables that match the specified wildcard pattern 指示从线程将复制限制为与指定通配符模式匹配的表
`replicate-wild-ignore-table`
Yes	No	No
Yes		No
DESCRIPTION: Tells the slave thread not to replicate to the tables that match the given wildcard pattern 告诉从线程不要复制到匹配给定通配符模式的表
`report-host`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Host name or IP of the slave to be reported to the master during slave registration 从注册期间要向主站报告的从的主机名或IP
`report-password`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: An arbitrary password that the slave server should report to the master. Not the same as the password for the MySQL replication user account.从服务器应向主服务器报告的任意密码。不同于MySQL复制用户帐户的密码。
`report-port`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Port for connecting to slave reported to the master during slave registration 在从注册期间，用于连接到从的端口报告给主站
`report-user`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: An arbitrary user name that a slave server should report to the master. Not the same as the name used with the MySQL replication user account.从服务器应向主服务器报告的任意用户名。不同于MySQL复制用户帐户使用的名称。
`Rpl_semi_sync_master_clients`
No	No	Yes
No	Global	No
DESCRIPTION: Number of semisynchronous slaves 半同步从的数量
`rpl_semi_sync_master_enabled`
No	Yes	No
No	Global	Yes
DESCRIPTION: Whether semisynchronous replication is enabled on the master 半同步复制是否在主中被启用
`Rpl_semi_sync_master_net_avg_wait_time`
No	No	Yes
No	Global	No
DESCRIPTION: The average time the master waited for a slave reply 主等待从响应的平均时间
`Rpl_semi_sync_master_net_wait_time`
No	No	Yes
No	Global	No
DESCRIPTION: The total time the master waited for slave replies 主等待从响应的总时间
`Rpl_semi_sync_master_net_waits`
No	No	Yes
No	Global	No
DESCRIPTION: The total number of times the master waited for slave replies 主等待从响应的总次数
`Rpl_semi_sync_master_no_times`
No	No	Yes
No	Global	No
DESCRIPTION: Number of times the master turned off semisynchronous replication 主节点关闭半同步复制的次数
`Rpl_semi_sync_master_no_tx`
No	No	Yes
No	Global	No
DESCRIPTION: Number of commits not acknowledged successfully 未成功确认的提交数
`Rpl_semi_sync_master_status`
No	No	Yes
No	Global	No
DESCRIPTION: Whether semisynchronous replication is operational on the master 主节点上是否可以进行半同步复制
`Rpl_semi_sync_master_timefunc_failures`
No	No	Yes
No	Global	No
DESCRIPTION: Number of times the master failed when calling time functions 调用时间函数时主服务器失败的次数
`rpl_semi_sync_master_timeout`
No	Yes	No
No	Global	Yes
DESCRIPTION: Number of milliseconds to wait for slave acknowledgment 等待从确认的毫秒数
`rpl_semi_sync_master_trace_level`
No	Yes	No
No	Global	Yes
DESCRIPTION: The semisynchronous replication debug trace level on the master 主节点上的半同步复制调试跟踪级别
`Rpl_semi_sync_master_tx_avg_wait_time`
No	No	Yes
No	Global	No
DESCRIPTION: The average time the master waited for each transaction 主等待每个事务的平均时间
`Rpl_semi_sync_master_tx_wait_time`
No	No	Yes
No	Global	No
DESCRIPTION: The total time the master waited for transactions 主等待事务的总时间
`Rpl_semi_sync_master_tx_waits`
No	No	Yes
No	Global	No
DESCRIPTION: The total number of times the master waited for transactions 主节点等待事务的总次数
`rpl_semi_sync_master_wait_for_slave_count`
No	Yes	No
No	Global	Yes
DESCRIPTION: How many slave acknowledgments the master must receive per transaction before proceeding 在继续之前从确认主必须收到的每个事务有多少
`rpl_semi_sync_master_wait_no_slave`
No	Yes	No
No	Global	Yes
DESCRIPTION: Whether master waits for timeout even with no slaves 主是否等待超时，即使没有从
`rpl_semi_sync_master_wait_point`
No	Yes	No
No	Global	Yes
DESCRIPTION: The wait point for slave transaction receipt acknowledgment 从事务接收确认的等待点
`Rpl_semi_sync_master_wait_pos_backtraverse`
No	No	Yes
No	Global	No
DESCRIPTION: The total number of times the master waited for an event with binary coordinates lower than events waited for previously主等待二进制坐标低于以前等待的事件的事件的总次数
`Rpl_semi_sync_master_wait_sessions`
No	No	Yes
No	Global	No
DESCRIPTION: Number of sessions currently waiting for slave replies 当前等待从回应的会话数
`Rpl_semi_sync_master_yes_tx`
No	No	Yes
No	Global	No
DESCRIPTION: Number of commits acknowledged successfully 确认成功提交的数量
`rpl_semi_sync_slave_enabled`
No	Yes	No
No	Global	Yes
DESCRIPTION: Whether semisynchronous replication is enabled on slave 是否在从设备上启用半同步复制
`Rpl_semi_sync_slave_status`
No	No	Yes
No	Global	No
DESCRIPTION: Whether semisynchronous replication is operational on slave 从设备上是否可以进行半同步复制
`rpl_semi_sync_slave_trace_level`
No	Yes	No
No	Global	Yes
DESCRIPTION: The semisynchronous replication debug trace level on the slave 从上的半同步复制调试跟踪级别
`rpl_stop_slave_timeout`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Set the number of seconds that STOP SLAVE waits before timing out. 设置STOP SLAVE在超时前等待的秒数
`server_uuid`
No	Yes	No
No	Global	No
DESCRIPTION: The server‘s globally unique ID, automatically (re)generated at server start 全局唯一ID，在服务启动时候生成
`show-slave-auth-info`
Yes	No	No
Yes		No
DESCRIPTION: Show user name and password in SHOW SLAVE HOSTS on this master 在主库上使用SHOW SLAVE STATUS显示用户名和密码
`simplified_binlog_gtid_recovery`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Controls how binary logs are iterated during GTID recovery 控制在GTID恢复期间如何迭代二进制日志
`skip-slave-start`
Yes	No	No
Yes		No
DESCRIPTION: If set, slave is not autostarted 设置后，从同步不会自动开启
`slave-checkpoint-group`
Yes	No	No
Yes		No
DESCRIPTION: Maximum number of transactions processed by a multi-threaded slave before a checkpoint operation is called to update progress status. Not supported by MySQL Cluster.多多线程从处理最大事务进程在检查点操作之前被调用来更新的进度情况。 MySQL集群不支持。
`slave-checkpoint-period`
Yes	No	No
Yes		No
DESCRIPTION: Update progress status of multi-threaded slave and flush relay log info to disk after this number of milliseconds. Not supported by MySQL Cluster.在这个毫秒数之后，将多线程从和刷新中继日志信息的进度状态更新到磁盘。 MySQL集群不支持。
`slave-load-tmpdir`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: The location where the slave should put its temporary files when replicating a LOAD DATA INFILE statement 复制LOAD DATA INFILE语句时从应置其临时文件的位置
`slave-max-allowed-packet`
Yes	No	No
Yes		No
DESCRIPTION: Maximum size, in bytes, of a packet that can be sent from a replication master to a slave; overrides max_allowed_packet.可以从复制主机发送到从机的数据包的最大大小（以字节为单位）; 覆盖max_allowed_packet。
`slave_net_timeout`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Number of seconds to wait for more data from a master/slave connection before aborting the read 在中止读取之前等待来自主/从连接的更多数据的秒数
`slave-parallel-type`
Yes	No	No
Yes		No
DESCRIPTION: Tells the slave to use database partioning (DATABASE) or timestamp information (LOGICAL_CLOCK) from the master to parallelize transactions. The default is DATABASE. 告诉从使用主数据库中的数据库分区（DATABASE）或时间戳信息（LOGICAL CLOCK）来并行化事务。默认值为DATABASE
`slave-parallel-workers`
Yes	No	No
Yes		No
DESCRIPTION: Number of worker threads for executing events in parallel. Set to 0 (the default) to disable slave multi-threading. Not supported by MySQL Cluster.并行执行事件的工作线程数。设置为0（默认值）以禁用从多线程。 MySQL集群不支持。
`slave-pending-jobs-size-max`
Yes	No	No
No		No
DESCRIPTION: Maximum size of slave worker queues holding events not yet applied. 保持事件尚未应用的从工作线程队列的最大大小
`slave-rows-search-algorithms`
Yes	No	No
Yes		No
DESCRIPTION: Determines search algorithms used for slave update batching. Any 2 or 3 from the list INDEX_SEARCH, TABLE_SCAN, HASH_SCAN; the default is TABLE_SCAN,INDEX_SCAN.
`slave-skip-errors`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Tells the slave thread to continue replication when a query returns an error from the provided list 当查询从提供的列表中返回错误时，告诉从线程继续复制
`slave_checkpoint_group`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Maximum number of transactions processed by a multi-threaded slave before a checkpoint operation is called to update progress status. Not supported by MySQL Cluster.多线程从处理最大事务进程在检查点操作之前被调用来更新的进度情况。 MySQL集群不支持。
`slave_checkpoint_period`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Update progress status of multi-threaded slave and flush relay log info to disk after this number of milliseconds. Not supported by MySQL Cluster.在这个毫秒数之后，将多线程从和刷新中继日志信息的进度状态更新到磁盘。 MySQL集群不支持。
`slave_compressed_protocol`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Use compression on master/slave protocol 在主/从协议上使用压缩
`slave_exec_mode`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Allows for switching the slave thread between IDEMPOTENT mode (key and some other errors suppressed) and STRICT mode; STRICT mode is the default, except for MySQL Cluster, where IDEMPOTENT is always used 允许在IDEMPOTENT模式（键和一些其他错误抑制）和STRICT模式之间切换从线程; STRICT模式是默认值，除了MySQL集群，其中始终使用IDEMPOTENT
`Slave_heartbeat_period`
No	No	Yes
No	Global	No
DESCRIPTION: The slave‘s replication heartbeat interval, in seconds 从节点的复制心跳间隔（以秒为单位）
`slave_max_allowed_packet`
No	Yes	No
No	Global	Yes
DESCRIPTION: Maximum size, in bytes, of a packet that can be sent from a replication master to a slave; overrides max_allowed_packet. 可以从复制主机发送到从机的数据包的最大大小（以字节为单位）; 覆盖max_allowed_packet。
`Slave_open_temp_tables`
No	No	Yes
No	Global	No
DESCRIPTION: Number of temporary tables that the slave SQL thread currently has open 从县城当前已打开的临时表空间数量
`slave_parallel_type`
No	Yes	No
No	Global	Yes
DESCRIPTION: Tells the slave to use database partioning (DATABASE) or information (LOGICAL_CLOCK) from master to parallelize transactions. The default is DATABASE. 告诉从使用主数据库中的数据库分区（DATABASE）或时间戳信息（LOGICAL CLOCK）来并行化事务。默认值为DATABASE
`slave_parallel_workers`
Yes	Yes	No
No	Global	Yes
DESCRIPTION: Number of worker threads for executing events in parallel. Set to 0 (the default) to disable slave multi-threading. Not supported by MySQL Cluster.并行执行事件的工作线程数。设置为0（默认值）以禁用从多线程。 MySQL集群不支持。
`slave_pending_jobs_size_max`
No	Yes	No
No	Global	Yes
DESCRIPTION: Maximum size of slave worker queues holding events not yet applied. 保持事件尚未应用的从工作线程队列的最大大小
`slave_preserve_commit_order`
Yes	Yes	No
No	Global	Yes
DESCRIPTION: Ensures that all commits by slave workers happen in the same order as on the master to maintain consistency when using parallel worker threads. 确保从属工作者的所有提交按照与主节点上的相同的顺序发生，以便在使用并行工作线程时保持一致性。
`Slave_retried_transactions`
No	No	Yes
No	Global	No
DESCRIPTION: The total number of times since startup that the replication slave SQL thread has retried transactions 自启动以来复制从属SQL线程已重试事务的总次数
`slave_rows_search_algorithms`
No	Yes	No
No	Global	Yes
DESCRIPTION: Determines search algorithms used for slave update batching. Any 2 or 3 from the list INDEX_SEARCH, TABLE_SCAN, HASH_SCAN; the default is TABLE_SCAN,INDEX_SCAN. 确定用于从属更新批处理的搜索算法。任何2或3从列表INDEX_SEARCH，TABLE_SCAN，HASH_SCAN; 默认值为TABLE_SCAN，INDEX_SCAN。
`Slave_running`
No	No	Yes
No	Global	No
DESCRIPTION: The state of this server as a replication slave (slave I/O thread status) 作为从复制的状态(从IO线程状态)
`slave_transaction_retries`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Number of times the slave SQL thread will retry a transaction in case it failed with a deadlock or elapsed lock wait timeout, before giving up and stopping 放弃和停止之前,从属SQL线程在死锁或失效锁定等待超时之前重试事务的次数
`slave_type_conversions`
Yes	Yes	No
Yes	Global	No
DESCRIPTION: Controls type conversion mode on replication slave. Value is a list of zero or more elements from the list: ALL_LOSSY, ALL_NON_LOSSY. Set to an empty string to disallow type conversions between master and slave.控制复制从站上的类型转换模式。值是列表中的零个或多个元素的列表：ALL_LOSSY，ALL_NON_LOSSY。设置为空字符串以禁止主机和从机之间的类型转换。
`sql_slave_skip_counter`
No	Yes	No
No	Global	Yes
DESCRIPTION: Number of events from the master that a slave server should skip. Not compatible with GTID replication. 从服务器应跳过的来自主服务器的事件数。与GTID复制不兼容。
`sync_binlog`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Synchronously flush binary log to disk after every #th event 在每个第＃个事件后，将二进制日志同步刷新到磁盘
`sync_master_info`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Synchronize master.info to disk after every #th event.在每个#事件之后，将master.info同步刷新到磁盘
`sync_relay_log`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Synchronize relay log to disk after every #th event. 在每个#事件后，将中继日志同步刷新到磁盘
`sync_relay_log_info`
Yes	Yes	No
Yes	Global	Yes
DESCRIPTION: Synchronize relay.info file to disk after every #th event. 在卖给#事件之后，将relay.info同步刷新到磁盘

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