--source include/not_embedded.inc # # only global # select @@global.relay_log_space_limit; --error ER_INCORRECT_GLOBAL_LOCAL_VAR select @@session.relay_log_space_limit; show global variables like 'relay_log_space_limit'; show session variables like 'relay_log_space_limit'; select * from information_schema.global_variables where variable_name='relay_log_space_limit'; select * from information_schema.session_variables where variable_name='relay_log_space_limit'; # # show that it's read-only # --error ER_INCORRECT_GLOBAL_LOCAL_VAR set global relay_log_space_limit=1; --error ER_INCORRECT_GLOBAL_LOCAL_VAR set session relay_log_space_limit=1;