| Server IP : 88.99.149.37 / Your IP : 216.73.216.141 Web Server : nginx/1.31.2 System : Linux server-88-99-149-37 6.12.0-124.56.5.el10_1.x86_64 #1 SMP PREEMPT_DYNAMIC Fri May 15 06:12:08 EDT 2026 x86_64 User : muralimurth ( 1015) PHP Version : 8.4.23 Disable Function : exec,system,passthru,shell_exec,proc_close,proc_open,dl,popen,show_source,posix_kill,posix_mkfifo,posix_getpwuid,posix_setpgid,posix_setsid,posix_setuid,posix_setgid,posix_seteuid,posix_setegid,posix_uname MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/local/mysql/mysql-test/suite/sys_vars/r/ |
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SET @start_global_value = @@global.innodb_random_read_ahead; SELECT @start_global_value; @start_global_value 0 Valid values are 'ON' and 'OFF' select @@global.innodb_random_read_ahead in (0, 1); @@global.innodb_random_read_ahead in (0, 1) 1 select @@global.innodb_random_read_ahead; @@global.innodb_random_read_ahead 0 select @@session.innodb_random_read_ahead; ERROR HY000: Variable 'innodb_random_read_ahead' is a GLOBAL variable show global variables like 'innodb_random_read_ahead'; Variable_name Value innodb_random_read_ahead OFF show session variables like 'innodb_random_read_ahead'; Variable_name Value innodb_random_read_ahead OFF select * from information_schema.global_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD OFF select * from information_schema.session_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD OFF set global innodb_random_read_ahead='ON'; select @@global.innodb_random_read_ahead; @@global.innodb_random_read_ahead 1 select * from information_schema.global_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD ON select * from information_schema.session_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD ON set @@global.innodb_random_read_ahead=0; select @@global.innodb_random_read_ahead; @@global.innodb_random_read_ahead 0 select * from information_schema.global_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD OFF select * from information_schema.session_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD OFF set global innodb_random_read_ahead=1; select @@global.innodb_random_read_ahead; @@global.innodb_random_read_ahead 1 select * from information_schema.global_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD ON select * from information_schema.session_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD ON set @@global.innodb_random_read_ahead='OFF'; select @@global.innodb_random_read_ahead; @@global.innodb_random_read_ahead 0 select * from information_schema.global_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD OFF select * from information_schema.session_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD OFF set session innodb_random_read_ahead='OFF'; ERROR HY000: Variable 'innodb_random_read_ahead' is a GLOBAL variable and should be set with SET GLOBAL set @@session.innodb_random_read_ahead='ON'; ERROR HY000: Variable 'innodb_random_read_ahead' is a GLOBAL variable and should be set with SET GLOBAL set global innodb_random_read_ahead=1.1; ERROR 42000: Incorrect argument type to variable 'innodb_random_read_ahead' set global innodb_random_read_ahead=1e1; ERROR 42000: Incorrect argument type to variable 'innodb_random_read_ahead' set global innodb_random_read_ahead=2; ERROR 42000: Variable 'innodb_random_read_ahead' can't be set to the value of '2' set global innodb_random_read_ahead=-3; ERROR 42000: Variable 'innodb_random_read_ahead' can't be set to the value of '-3' select @@global.innodb_random_read_ahead; @@global.innodb_random_read_ahead 0 select * from information_schema.global_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD OFF select * from information_schema.session_variables where variable_name='innodb_random_read_ahead'; VARIABLE_NAME VARIABLE_VALUE INNODB_RANDOM_READ_AHEAD OFF set global innodb_random_read_ahead='AUTO'; ERROR 42000: Variable 'innodb_random_read_ahead' can't be set to the value of 'AUTO' SET @@global.innodb_random_read_ahead = @start_global_value; SELECT @@global.innodb_random_read_ahead; @@global.innodb_random_read_ahead 0