select @@global.open_files_limit;
@@global.open_files_limit
#
select @@session.open_files_limit;
ERROR HY000: Variable 'open_files_limit' is a GLOBAL variable
show global variables like 'open_files_limit';
Variable_name	Value
open_files_limit	#
show session variables like 'open_files_limit';
Variable_name	Value
open_files_limit	#
select * from information_schema.global_variables where variable_name='open_files_limit';
VARIABLE_NAME	VARIABLE_VALUE
OPEN_FILES_LIMIT	#
select * from information_schema.session_variables where variable_name='open_files_limit';
VARIABLE_NAME	VARIABLE_VALUE
OPEN_FILES_LIMIT	#
set global open_files_limit=1;
ERROR HY000: Variable 'open_files_limit' is a read only variable
set session open_files_limit=1;
ERROR HY000: Variable 'open_files_limit' is a read only variable
