--source include/have_innodb.inc

SET @saved_page_cleaners = @@GLOBAL.innodb_page_cleaners;

create table t1 (a int not null primary key auto_increment,
b bigint,
c varchar(200),
d int,
key b (b),
key d (d)) engine=INNODB;

let $rows = 15000;
--disable_query_log
begin;
while ($rows)
{
    eval insert into t1 values(NULL, $rows, 'testing...', $rows+1000);
    dec $rows;
}
commit;
--enable_query_log

#
# We want 4 connections: (1) - (3) to create dirty pages
# and default to modify the number of page cleaner threads
#

set GLOBAL innodb_page_cleaners = 4;

connect (con1,localhost,root,,);
connection con1;
send update t1 set b = b + 5, d = d + 1 where a between 1 and 2000;

connect (con2,localhost,root,,);
connection con2;
send update t1 set b = b + 5, d = d + 1 where a between 3000 and 5000;


connect (con3,localhost,root,,);
connection con3;
send update t1 set b = b + 5, d = d + 1 where a between 8000 and 12000;

#
# Page cleaners are increased
#

connection default;
set GLOBAL innodb_page_cleaners = 2;
set GLOBAL innodb_page_cleaners = 4;
set GLOBAL innodb_page_cleaners = 6;

connection con1;
reap;

connection con2;
reap;

connection con3;
reap;

connection default;
set GLOBAL innodb_page_cleaners = 4;

#
# Page cleaners are decreased
#

connection con1;
send update t1 set b = b + 5, d = d + 1 where a between 1 and 2000;

connection con2;
send update t1 set b = b + 5, d = d + 1 where a between 3000 and 5000;

connection con3;
send update t1 set b = b + 5, d = d + 1 where a between 8000 and 12000;

connection default;
set GLOBAL innodb_page_cleaners = 3;
set GLOBAL innodb_page_cleaners = 2;
set GLOBAL innodb_page_cleaners = 1;

connection con1;
reap;

connection con2;
reap;

connection con3;
reap;

connection default;
disconnect con1;
disconnect con2;
disconnect con3;

DROP TABLE t1;

SET GLOBAL innodb_page_cleaners=@saved_page_cleaners;