1SET @start_global_value = @@global.profiling_history_size; 2SELECT @start_global_value; 3@start_global_value 415 5select @@global.profiling_history_size; 6@@global.profiling_history_size 715 8select @@session.profiling_history_size; 9@@session.profiling_history_size 1015 11show global variables like 'profiling_history_size'; 12Variable_name Value 13profiling_history_size 15 14show session variables like 'profiling_history_size'; 15Variable_name Value 16profiling_history_size 15 17select * from information_schema.global_variables where variable_name='profiling_history_size'; 18VARIABLE_NAME VARIABLE_VALUE 19PROFILING_HISTORY_SIZE 15 20select * from information_schema.session_variables where variable_name='profiling_history_size'; 21VARIABLE_NAME VARIABLE_VALUE 22PROFILING_HISTORY_SIZE 15 23set global profiling_history_size=10; 24set session profiling_history_size=20; 25select @@global.profiling_history_size; 26@@global.profiling_history_size 2710 28select @@session.profiling_history_size; 29@@session.profiling_history_size 3020 31show global variables like 'profiling_history_size'; 32Variable_name Value 33profiling_history_size 10 34show session variables like 'profiling_history_size'; 35Variable_name Value 36profiling_history_size 20 37select * from information_schema.global_variables where variable_name='profiling_history_size'; 38VARIABLE_NAME VARIABLE_VALUE 39PROFILING_HISTORY_SIZE 10 40select * from information_schema.session_variables where variable_name='profiling_history_size'; 41VARIABLE_NAME VARIABLE_VALUE 42PROFILING_HISTORY_SIZE 20 43set global profiling_history_size=1.1; 44ERROR 42000: Incorrect argument type to variable 'profiling_history_size' 45set global profiling_history_size=1e1; 46ERROR 42000: Incorrect argument type to variable 'profiling_history_size' 47set global profiling_history_size="foo"; 48ERROR 42000: Incorrect argument type to variable 'profiling_history_size' 49set session profiling_history_size=0; 50select @@profiling_history_size; 51@@profiling_history_size 520 53set session profiling_history_size=101; 54Warnings: 55Warning 1292 Truncated incorrect profiling_history_size value: '101' 56select @@profiling_history_size; 57@@profiling_history_size 58100 59SET @@global.profiling_history_size = @start_global_value; 60SELECT @@global.profiling_history_size; 61@@global.profiling_history_size 6215 63