SET @start_global_value = @@global.innodb_stats_sample_pages;
SELECT @start_global_value;
@start_global_value
8
Valid values are one or above
select @@global.innodb_stats_sample_pages >=1;
@@global.innodb_stats_sample_pages >=1
1
select @@global.innodb_stats_sample_pages;
@@global.innodb_stats_sample_pages
8
select @@session.innodb_stats_sample_pages;
ERROR HY000: Variable 'innodb_stats_sample_pages' is a GLOBAL variable
show global variables like 'innodb_stats_sample_pages';
Variable_name	Value
innodb_stats_sample_pages	8
show session variables like 'innodb_stats_sample_pages';
Variable_name	Value
innodb_stats_sample_pages	8
select * from information_schema.global_variables where variable_name='innodb_stats_sample_pages';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_STATS_SAMPLE_PAGES	8
select * from information_schema.session_variables where variable_name='innodb_stats_sample_pages';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_STATS_SAMPLE_PAGES	8
set global innodb_stats_sample_pages=10;
Warnings:
Warning	131	Using innodb_stats_sample_pages is deprecated and the variable may be removed in future releases. Please use innodb_stats_transient_sample_pages instead.
select @@global.innodb_stats_sample_pages;
@@global.innodb_stats_sample_pages
10
select * from information_schema.global_variables where variable_name='innodb_stats_sample_pages';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_STATS_SAMPLE_PAGES	10
select * from information_schema.session_variables where variable_name='innodb_stats_sample_pages';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_STATS_SAMPLE_PAGES	10
set session innodb_stats_sample_pages=1;
ERROR HY000: Variable 'innodb_stats_sample_pages' is a GLOBAL variable and should be set with SET GLOBAL
set global innodb_stats_sample_pages=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_stats_sample_pages'
set global innodb_stats_sample_pages=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_stats_sample_pages'
set global innodb_stats_sample_pages="foo";
ERROR 42000: Incorrect argument type to variable 'innodb_stats_sample_pages'
set global innodb_stats_sample_pages=-7;
Warnings:
Warning	1292	Truncated incorrect innodb_stats_sample_pages value: '-7'
Warning	131	Using innodb_stats_sample_pages is deprecated and the variable may be removed in future releases. Please use innodb_stats_transient_sample_pages instead.
select @@global.innodb_stats_sample_pages;
@@global.innodb_stats_sample_pages
1
select * from information_schema.global_variables where variable_name='innodb_stats_sample_pages';
VARIABLE_NAME	VARIABLE_VALUE
INNODB_STATS_SAMPLE_PAGES	1
SET @@global.innodb_stats_sample_pages = @start_global_value;
Warnings:
Warning	131	Using innodb_stats_sample_pages is deprecated and the variable may be removed in future releases. Please use innodb_stats_transient_sample_pages instead.
SELECT @@global.innodb_stats_sample_pages;
@@global.innodb_stats_sample_pages
8