SET @save_pct= @@GLOBAL.innodb_max_dirty_pages_pct;
SET @save_pct_lwm= @@GLOBAL.innodb_max_dirty_pages_pct_lwm;
SET GLOBAL innodb_max_dirty_pages_pct_lwm=0.0;
SET GLOBAL innodb_max_dirty_pages_pct=0.0;
SET GLOBAL innodb_max_dirty_pages_pct=90.0;
select variable_value into @innodb_async_writes_total_count_before
from information_schema.global_status
where variable_name='innodb_async_writes_total_count';
CREATE TABLE t ENGINE=InnoDB SELECT * FROM seq_1_to_10000;
SELECT variable_value>0 FROM information_schema.global_status
WHERE variable_name = 'INNODB_BUFFER_POOL_PAGES_DIRTY';
variable_value>0
1
SET GLOBAL innodb_max_dirty_pages_pct=0.0;
select (cast(variable_value as unsigned) >
cast(@innodb_async_writes_total_count_before as unsigned))
as innodb_async_writes_grow
from information_schema.global_status
where variable_name='innodb_async_writes_total_count';
innodb_async_writes_grow
1
DROP TABLE t;
SET GLOBAL innodb_max_dirty_pages_pct = @save_pct;
SET GLOBAL innodb_max_dirty_pages_pct_lwm = @save_pct_lwm;