1select @@global.innodb_ft_total_cache_size;
2@@global.innodb_ft_total_cache_size
3640000000
4select @@session.innodb_ft_total_cache_size;
5ERROR HY000: Variable 'innodb_ft_total_cache_size' is a GLOBAL variable
6show global variables like 'innodb_ft_total_cache_size';
7Variable_name	Value
8innodb_ft_total_cache_size	640000000
9show session variables like 'innodb_ft_total_cache_size';
10Variable_name	Value
11innodb_ft_total_cache_size	640000000
12select * from information_schema.global_variables where variable_name='innodb_ft_total_cache_size';
13VARIABLE_NAME	VARIABLE_VALUE
14INNODB_FT_TOTAL_CACHE_SIZE	640000000
15select * from information_schema.session_variables where variable_name='innodb_ft_total_cache_size';
16VARIABLE_NAME	VARIABLE_VALUE
17INNODB_FT_TOTAL_CACHE_SIZE	640000000
18set global innodb_ft_total_cache_size=1;
19ERROR HY000: Variable 'innodb_ft_total_cache_size' is a read only variable
20set session innodb_ft_total_cache_size=1;
21ERROR HY000: Variable 'innodb_ft_total_cache_size' is a read only variable
22