SET @start_global_value = @@global.profiling_history_size; Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. SELECT @start_global_value; @start_global_value 15 select @@global.profiling_history_size; @@global.profiling_history_size 15 Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. select @@session.profiling_history_size; @@session.profiling_history_size 15 Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. show global variables like 'profiling_history_size'; Variable_name Value profiling_history_size 15 show session variables like 'profiling_history_size'; Variable_name Value profiling_history_size 15 select * from information_schema.global_variables where variable_name='profiling_history_size'; VARIABLE_NAME VARIABLE_VALUE PROFILING_HISTORY_SIZE 15 select * from information_schema.session_variables where variable_name='profiling_history_size'; VARIABLE_NAME VARIABLE_VALUE PROFILING_HISTORY_SIZE 15 set global profiling_history_size=10; Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. set session profiling_history_size=20; Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. select @@global.profiling_history_size; @@global.profiling_history_size 10 Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. select @@session.profiling_history_size; @@session.profiling_history_size 20 Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. show global variables like 'profiling_history_size'; Variable_name Value profiling_history_size 10 show session variables like 'profiling_history_size'; Variable_name Value profiling_history_size 20 select * from information_schema.global_variables where variable_name='profiling_history_size'; VARIABLE_NAME VARIABLE_VALUE PROFILING_HISTORY_SIZE 10 select * from information_schema.session_variables where variable_name='profiling_history_size'; VARIABLE_NAME VARIABLE_VALUE PROFILING_HISTORY_SIZE 20 set global profiling_history_size=1.1; ERROR 42000: Incorrect argument type to variable 'profiling_history_size' set global profiling_history_size=1e1; ERROR 42000: Incorrect argument type to variable 'profiling_history_size' set global profiling_history_size="foo"; ERROR 42000: Incorrect argument type to variable 'profiling_history_size' set session profiling_history_size=0; Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. select @@profiling_history_size; @@profiling_history_size 0 Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. set session profiling_history_size=101; Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. Warning 1292 Truncated incorrect profiling_history_size value: '101' select @@profiling_history_size; @@profiling_history_size 100 Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. SET @@global.profiling_history_size = @start_global_value; Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release. SELECT @@global.profiling_history_size; @@global.profiling_history_size 15 Warnings: Warning 1287 '@@profiling_history_size' is deprecated and will be removed in a future release.