SET @start_global_value = @@global.innodb_api_bk_commit_interval; SELECT @start_global_value; @start_global_value 5 Valid values are positive number SELECT @@global.innodb_api_bk_commit_interval > 0; @@global.innodb_api_bk_commit_interval > 0 1 SELECT @@global.innodb_api_bk_commit_interval <= 1024*1024*1024; @@global.innodb_api_bk_commit_interval <= 1024*1024*1024 1 SELECT @@global.innodb_api_bk_commit_interval; @@global.innodb_api_bk_commit_interval 5 SELECT @@session.innodb_api_bk_commit_interval; ERROR HY000: Variable 'innodb_api_bk_commit_interval' is a GLOBAL variable SHOW global variables LIKE 'innodb_api_bk_commit_interval'; Variable_name Value innodb_api_bk_commit_interval 5 SHOW session variables LIKE 'innodb_api_bk_commit_interval'; Variable_name Value innodb_api_bk_commit_interval 5 SELECT * FROM information_schema.global_variables WHERE variable_name='innodb_api_bk_commit_interval'; VARIABLE_NAME VARIABLE_VALUE INNODB_API_BK_COMMIT_INTERVAL 5 SELECT * FROM information_schema.session_variables WHERE variable_name='innodb_api_bk_commit_interval'; VARIABLE_NAME VARIABLE_VALUE INNODB_API_BK_COMMIT_INTERVAL 5 SET global innodb_api_bk_commit_interval=100; SELECT @@global.innodb_api_bk_commit_interval; @@global.innodb_api_bk_commit_interval 100 SELECT * FROM information_schema.global_variables WHERE variable_name='innodb_api_bk_commit_interval'; VARIABLE_NAME VARIABLE_VALUE INNODB_API_BK_COMMIT_INTERVAL 100 SELECT * FROM information_schema.session_variables WHERE variable_name='innodb_api_bk_commit_interval'; VARIABLE_NAME VARIABLE_VALUE INNODB_API_BK_COMMIT_INTERVAL 100 SET session innodb_api_bk_commit_interval=1; ERROR HY000: Variable 'innodb_api_bk_commit_interval' is a GLOBAL variable and should be set with SET GLOBAL SET global innodb_api_bk_commit_interval=1.1; ERROR 42000: Incorrect argument type to variable 'innodb_api_bk_commit_interval' SET global innodb_api_bk_commit_interval=1e1; ERROR 42000: Incorrect argument type to variable 'innodb_api_bk_commit_interval' SET global innodb_api_bk_commit_interval="foo"; ERROR 42000: Incorrect argument type to variable 'innodb_api_bk_commit_interval' SET global innodb_api_bk_commit_interval=-7; Warnings: Warning 1292 Truncated incorrect innodb_api_bk_commit_interval value: '-7' SELECT @@global.innodb_api_bk_commit_interval; @@global.innodb_api_bk_commit_interval 1 SELECT * FROM information_schema.global_variables WHERE variable_name='innodb_api_bk_commit_interval'; VARIABLE_NAME VARIABLE_VALUE INNODB_API_BK_COMMIT_INTERVAL 1 SET @@global.innodb_api_bk_commit_interval = @start_global_value; SELECT @@global.innodb_api_bk_commit_interval; @@global.innodb_api_bk_commit_interval 5