1select @@global.innodb_force_recovery_crash in (0, 1); 2@@global.innodb_force_recovery_crash in (0, 1) 31 4select @@global.innodb_force_recovery_crash; 5@@global.innodb_force_recovery_crash 60 7select @@session.innodb_force_recovery_crash; 8ERROR HY000: Variable 'innodb_force_recovery_crash' is a GLOBAL variable 9show global variables like 'innodb_force_recovery_crash'; 10Variable_name Value 11innodb_force_recovery_crash 0 12show session variables like 'innodb_force_recovery_crash'; 13Variable_name Value 14innodb_force_recovery_crash 0 15select * from information_schema.global_variables where variable_name='innodb_force_recovery_crash'; 16VARIABLE_NAME VARIABLE_VALUE 17INNODB_FORCE_RECOVERY_CRASH 0 18select * from information_schema.session_variables where variable_name='innodb_force_recovery_crash'; 19VARIABLE_NAME VARIABLE_VALUE 20INNODB_FORCE_RECOVERY_CRASH 0 21set global innodb_force_recovery_crash=1; 22ERROR HY000: Variable 'innodb_force_recovery_crash' is a read only variable 23set global innodb_force_recovery_crash=0; 24ERROR HY000: Variable 'innodb_force_recovery_crash' is a read only variable 25select @@global.innodb_force_recovery_crash; 26@@global.innodb_force_recovery_crash 270 28set session innodb_force_recovery_crash='some'; 29ERROR HY000: Variable 'innodb_force_recovery_crash' is a read only variable 30set @@session.innodb_force_recovery_crash='some'; 31ERROR HY000: Variable 'innodb_force_recovery_crash' is a read only variable 32set global innodb_force_recovery_crash='some'; 33ERROR HY000: Variable 'innodb_force_recovery_crash' is a read only variable 34