1select @@global.innodb_ft_sort_pll_degree; 2@@global.innodb_ft_sort_pll_degree 32 4select @@session.innodb_ft_sort_pll_degree; 5ERROR HY000: Variable 'innodb_ft_sort_pll_degree' is a GLOBAL variable 6show global variables like 'innodb_ft_sort_pll_degree'; 7Variable_name Value 8innodb_ft_sort_pll_degree 2 9show session variables like 'innodb_ft_sort_pll_degree'; 10Variable_name Value 11innodb_ft_sort_pll_degree 2 12select * from information_schema.global_variables where variable_name='innodb_ft_sort_pll_degree'; 13VARIABLE_NAME VARIABLE_VALUE 14INNODB_FT_SORT_PLL_DEGREE 2 15select * from information_schema.session_variables where variable_name='innodb_ft_sort_pll_degree'; 16VARIABLE_NAME VARIABLE_VALUE 17INNODB_FT_SORT_PLL_DEGREE 2 18set global innodb_ft_sort_pll_degree=1; 19ERROR HY000: Variable 'innodb_ft_sort_pll_degree' is a read only variable 20set session innodb_ft_sort_pll_degree=1; 21ERROR HY000: Variable 'innodb_ft_sort_pll_degree' is a read only variable 22