# 2010-01-25 - Added # --source include/have_innodb.inc SET @start_global_value = @@global.innodb_old_blocks_pct; SELECT @start_global_value; # # exists as global only # --echo Valid values are between 5 and 95 select @@global.innodb_old_blocks_pct between 5 and 95; select @@global.innodb_old_blocks_pct; --error ER_INCORRECT_GLOBAL_LOCAL_VAR select @@session.innodb_old_blocks_pct; show global variables like 'innodb_old_blocks_pct'; show session variables like 'innodb_old_blocks_pct'; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_old_blocks_pct'; select * from information_schema.session_variables where variable_name='innodb_old_blocks_pct'; --enable_warnings # # show that it's writable # set global innodb_old_blocks_pct=10; select @@global.innodb_old_blocks_pct; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_old_blocks_pct'; select * from information_schema.session_variables where variable_name='innodb_old_blocks_pct'; --enable_warnings --error ER_GLOBAL_VARIABLE set session innodb_old_blocks_pct=1; # # check the default value # set @@global.innodb_old_blocks_pct=DEFAULT; select @@global.innodb_old_blocks_pct; # # incorrect types # --error ER_WRONG_TYPE_FOR_VAR set global innodb_old_blocks_pct=1.1; --error ER_WRONG_TYPE_FOR_VAR set global innodb_old_blocks_pct=1e1; --error ER_WRONG_TYPE_FOR_VAR set global innodb_old_blocks_pct="foo"; --error ER_WRONG_TYPE_FOR_VAR set global innodb_old_blocks_pct=" "; --error ER_WRONG_TYPE_FOR_VAR set global innodb_old_blocks_pct=''; set global innodb_old_blocks_pct=4; select @@global.innodb_old_blocks_pct; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_old_blocks_pct'; --enable_warnings set global innodb_old_blocks_pct=-7; select @@global.innodb_old_blocks_pct; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_old_blocks_pct'; --enable_warnings set global innodb_old_blocks_pct=96; select @@global.innodb_old_blocks_pct; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_old_blocks_pct'; --enable_warnings # # min/max values # set global innodb_old_blocks_pct=5; select @@global.innodb_old_blocks_pct; set global innodb_old_blocks_pct=95; select @@global.innodb_old_blocks_pct; SET @@global.innodb_old_blocks_pct = @start_global_value; SELECT @@global.innodb_old_blocks_pct;