create table snapshot_status engine = myisam
select * from information_schema.global_status
where variable_name like 'innodb_scrub%';
#
# Test delete of records
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=compact;
# Populate table with rows
delete from t1;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# compact: delete from: grep -c bicycle t1.ibd
0
# compact: delete from: grep -c bicycle ibdata1
0
# compact: delete from: grep -c repairman t1.ibd
0
# compact: delete from: grep -c repairman ibdata1
0
drop table t1;
#
# Test delete+rollback+delete
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=compact;
# Populate table with rows
begin;
delete from t1;
rollback;
delete from t1;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# compact: delete rollback: grep -c bicycle t1.ibd
0
# compact: delete rollback: grep -c bicycle ibdata1
0
# compact: delete rollback: grep -c repairman t1.ibd
0
# compact: delete rollback: grep -c repairman ibdata1
0
drop table t1;
#
# Test insert+rollback
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=compact;
# Populate table with rows
begin;
rollback;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# compact: insert rollback: grep -c bicycle t1.ibd
0
# compact: insert rollback: grep -c bicycle ibdata1
0
# compact: insert rollback: grep -c repairman t1.ibd
0
# compact: insert rollback: grep -c repairman ibdata1
0
drop table t1;
#
# Test delete of records
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=redundant;
# Populate table with rows
delete from t1;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# redundant: delete from: grep -c bicycle t1.ibd
0
# redundant: delete from: grep -c bicycle ibdata1
0
# redundant: delete from: grep -c repairman t1.ibd
0
# redundant: delete from: grep -c repairman ibdata1
0
drop table t1;
#
# Test delete+rollback+delete
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=redundant;
# Populate table with rows
begin;
delete from t1;
rollback;
delete from t1;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# redundant: delete rollback: grep -c bicycle t1.ibd
0
# redundant: delete rollback: grep -c bicycle ibdata1
0
# redundant: delete rollback: grep -c repairman t1.ibd
0
# redundant: delete rollback: grep -c repairman ibdata1
0
drop table t1;
#
# Test insert+rollback
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=redundant;
# Populate table with rows
begin;
rollback;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# redundant: insert rollback: grep -c bicycle t1.ibd
0
# redundant: insert rollback: grep -c bicycle ibdata1
0
# redundant: insert rollback: grep -c repairman t1.ibd
0
# redundant: insert rollback: grep -c repairman ibdata1
0
drop table t1;
#
# Test delete of records
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=dynamic;
# Populate table with rows
delete from t1;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# dynamic: delete from: grep -c bicycle t1.ibd
0
# dynamic: delete from: grep -c bicycle ibdata1
0
# dynamic: delete from: grep -c repairman t1.ibd
0
# dynamic: delete from: grep -c repairman ibdata1
0
drop table t1;
#
# Test delete+rollback+delete
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=dynamic;
# Populate table with rows
begin;
delete from t1;
rollback;
delete from t1;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# dynamic: delete rollback: grep -c bicycle t1.ibd
0
# dynamic: delete rollback: grep -c bicycle ibdata1
0
# dynamic: delete rollback: grep -c repairman t1.ibd
0
# dynamic: delete rollback: grep -c repairman ibdata1
0
drop table t1;
#
# Test insert+rollback
#
create table t1 (
a int auto_increment primary key,
b varchar(256),
c text) engine = innodb row_format=dynamic;
# Populate table with rows
begin;
rollback;
# restart mysqld so that all pages are flushed
# read all rows from table
select * from t1;
# dynamic: insert rollback: grep -c bicycle t1.ibd
0
# dynamic: insert rollback: grep -c bicycle ibdata1
0
# dynamic: insert rollback: grep -c repairman t1.ibd
0
# dynamic: insert rollback: grep -c repairman ibdata1
0
drop table t1;
show variables like 'innodb_%scrub_data%';
Variable_name	Value
innodb_background_scrub_data_check_interval	3600
innodb_background_scrub_data_compressed	OFF
innodb_background_scrub_data_interval	604800
innodb_background_scrub_data_uncompressed	OFF
innodb_immediate_scrub_data_uncompressed	ON
# verify that this test have not caused any background scrubbing
select ss.variable_name, gs.variable_value - ss.variable_value as variable_value
from snapshot_status ss,
information_schema.global_status gs
where ss.variable_name = gs.variable_name;
variable_name	variable_value
INNODB_SCRUB_BACKGROUND_PAGE_REORGANIZATIONS	0
INNODB_SCRUB_BACKGROUND_PAGE_SPLITS	0
INNODB_SCRUB_BACKGROUND_PAGE_SPLIT_FAILURES_MISSING_INDEX	0
INNODB_SCRUB_BACKGROUND_PAGE_SPLIT_FAILURES_OUT_OF_FILESPACE	0
INNODB_SCRUB_BACKGROUND_PAGE_SPLIT_FAILURES_UNDERFLOW	0
INNODB_SCRUB_BACKGROUND_PAGE_SPLIT_FAILURES_UNKNOWN	0
drop table snapshot_status;