mirror of
https://github.com/MariaDB/server.git
synced 2025-01-27 09:14:17 +01:00
77 lines
2.5 KiB
Text
77 lines
2.5 KiB
Text
--source include/have_innodb.inc
|
|
--source include/have_sequence.inc
|
|
|
|
|
|
# Each row is 1K.
|
|
create table t1 (
|
|
a varchar(255),
|
|
b varchar(255),
|
|
c varchar(255),
|
|
d varchar(255),
|
|
primary key(a,b,c,d)
|
|
) engine=innodb;
|
|
|
|
# The data size is 16K * 1K = 16M
|
|
# 16M / (page_size=16K) = 1K pages.
|
|
SET unique_checks=0, foreign_key_checks= 0;
|
|
begin;
|
|
insert into t1 select
|
|
repeat(uuid(), 7),
|
|
repeat(uuid(), 7),
|
|
repeat(uuid(), 7),
|
|
repeat(uuid(), 7)
|
|
from seq_1_to_16384;
|
|
insert into t1 values ('z','z','z','z');
|
|
commit;
|
|
|
|
--echo # Restart the server to make sure we have an empty InnoDB Buffer Pool
|
|
--echo # (in the test's .opt file we've disabled buffer pool saving/loading
|
|
--echo # and also tried to disable any background activity)
|
|
SET GLOBAL innodb_fast_shutdown=0;
|
|
--source include/restart_mysqld.inc
|
|
|
|
set @innodb_pages_read0=
|
|
(select variable_value
|
|
from information_schema.session_status
|
|
where variable_name like 'innodb_pages_read');
|
|
|
|
let $analyze_output= `analyze format=json
|
|
select * from t1 force index (PRIMARY) order by a,b,c,d`;
|
|
evalp set @js='$analyze_output';
|
|
|
|
set @js=json_extract(@js, '$.query_block.nested_loop[0].table.r_engine_stats');
|
|
#select @js;
|
|
set @pages_accessed= cast(json_value(@js,'$.pages_accessed') as INT);
|
|
set @pages_read_count= cast(json_value(@js,'$.pages_read_count') as INT);
|
|
set @pages_prefetch_read_count= cast(json_value(@js,'$.pages_prefetch_read_count') as INT);
|
|
|
|
select @pages_accessed > 1000 and @pages_accessed < 1500;
|
|
|
|
set @total_read = (@pages_read_count + @pages_prefetch_read_count);
|
|
|
|
select @pages_accessed*0.75 < @total_read, @total_read < @pages_accessed*1.25;
|
|
|
|
set @innodb_pages_read1=
|
|
(select variable_value
|
|
from information_schema.session_status
|
|
where variable_name like 'innodb_pages_read');
|
|
|
|
set @innodb_pages_read_incr= (@innodb_pages_read1 - @innodb_pages_read0);
|
|
|
|
select @innodb_pages_read_incr > 1000, @innodb_pages_read_incr < 1500;
|
|
|
|
let $analyze_output= `analyze format=json
|
|
select * from t1 force index (PRIMARY) order by a,b,c,d`;
|
|
evalp set @js='$analyze_output';
|
|
set @js=json_extract(@js, '$.query_block.nested_loop[0].table.r_engine_stats');
|
|
|
|
--echo # This must just print pages_accessed. No page reads or prefetch reads,
|
|
--echo # because the previous query has read all the needed pages into the
|
|
--echo # buffer pool, which is set to be large enough to accomodate the whole
|
|
--echo # table.
|
|
--replace_regex /[0-9]+/NUMBER/
|
|
select @js;
|
|
set @pages_accessed2= cast(json_value(@js,'$.pages_accessed') as INT);
|
|
|
|
select @pages_accessed2 = @pages_accessed;
|
|
drop table t1;
|