reset master; set @restore_slave_net_timeout= @@global.slave_net_timeout; set @@global.slave_net_timeout= 10; Warnings: Warning 1624 The currect value for master_heartbeat_period exceeds the new value of `slave_net_timeout' sec. A sensible value for the period should be less than the timeout. change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root'; show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 5.000 change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_heartbeat_period= 4294968; ERROR HY000: The requested value for the heartbeat period is negative or exceeds the maximum 4294967 seconds show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 5.000 change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_heartbeat_period= 0.0009999; Warnings: Warning 1624 The requested value for the heartbeat period is less than 1 msec. The period is reset to zero which means no heartbeats will be sending show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 0.000 change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_heartbeat_period= 4294967; Warnings: Warning 1624 The requested value for the heartbeat period exceeds the value of `slave_net_timeout' sec. A sensible value for the period should be less than the timeout. show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 4294967.000 change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_heartbeat_period= 0.001; show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 0.001 reset slave; set @@global.slave_net_timeout= 5; change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_heartbeat_period= 5.001; Warnings: Warning 1624 The requested value for the heartbeat period exceeds the value of `slave_net_timeout' sec. A sensible value for the period should be less than the timeout. show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 5.001 reset slave; set @@global.slave_net_timeout= 5; change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_heartbeat_period= 4; show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 4.000 set @@global.slave_net_timeout= 3 /* must be a warning */; Warnings: Warning 1624 The currect value for master_heartbeat_period exceeds the new value of `slave_net_timeout' sec. A sensible value for the period should be less than the timeout. reset slave; drop table if exists t1; set @@global.slave_net_timeout= 10; change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root', master_heartbeat_period= 0.5; show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 0.500 start slave; create table t1 (f1 int); SHOW SLAVE STATUS; Slave_IO_State # Master_Host 127.0.0.1 Master_User root Master_Port MASTER_PORT Connect_Retry 1 Master_Log_File master-bin.000001 Read_Master_Log_Pos 280 Relay_Log_File # Relay_Log_Pos # Relay_Master_Log_File master-bin.000001 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 280 Relay_Log_Space # 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 # Master_SSL_Verify_Server_Cert No Last_IO_Errno # Last_IO_Error # Last_SQL_Errno 0 Last_SQL_Error Replicate_Ignore_Server_Ids Master_Server_Id 1 SHOW SLAVE STATUS; Slave_IO_State # Master_Host 127.0.0.1 Master_User root Master_Port MASTER_PORT Connect_Retry 1 Master_Log_File master-bin.000001 Read_Master_Log_Pos 280 Relay_Log_File # Relay_Log_Pos # Relay_Master_Log_File master-bin.000001 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 280 Relay_Log_Space # 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 # Master_SSL_Verify_Server_Cert No Last_IO_Errno # Last_IO_Error # Last_SQL_Errno 0 Last_SQL_Error Replicate_Ignore_Server_Ids Master_Server_Id 1 show status like 'Slave_heartbeat_period';; Variable_name Slave_heartbeat_period Value 0.500 A heartbeat has been received by the slave drop table t1; set @@global.slave_net_timeout= @restore_slave_net_timeout; End of tests