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Better comments and add a test case.

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This commit is contained in:
Jan Lindström
2014-11-25 08:06:41 +02:00
parent 8ff66501ca
commit e5802c38f9
4 changed files with 106 additions and 12 deletions
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78
mysql-test/suite/innodb/t/innodb-stats-sample.test Normal file
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--source include/have_innodb.inc
#
# Test that mysqld does not crash when running ANALYZE TABLE with
# different values of the parameter innodb_stats_sample_pages.
#
# we care only that the following SQL commands do not produce errors
# and do not crash the server
-- disable_query_log
-- disable_result_log
-- enable_warnings
let $sample_pages=`select @@innodb_stats_sample_pages`;
let $traditional=`select @@innodb_stats_traditional`;
SET GLOBAL innodb_stats_sample_pages=0;
#use new method to calculate statistics
SET GLOBAL innodb_stats_traditional=0;
# check that the value has been adjusted to 1
-- enable_result_log
SHOW VARIABLES LIKE 'innodb_stats_sample_pages';
SHOW VARIABLES LIKE 'innodb_stats_traditional';
-- disable_result_log
CREATE TABLE innodb_analyze (
a INT,
b INT,
c char(50),
KEY(a),
KEY(b,a)
) ENGINE=InnoDB;
# test with empty table
ANALYZE TABLE innodb_analyze;
SET GLOBAL innodb_stats_sample_pages=2;
ANALYZE TABLE innodb_analyze;
SET GLOBAL innodb_stats_sample_pages=1;
ANALYZE TABLE innodb_analyze;
SET GLOBAL innodb_stats_sample_pages=8000;
ANALYZE TABLE innodb_analyze;
delimiter //;
create procedure innodb_insert_proc (repeat_count int)
begin
declare current_num int;
set current_num = 0;
while current_num < repeat_count do
insert into innodb_analyze values(current_num, current_num*100,substring(MD5(RAND()), -44));
set current_num = current_num + 1;
end while;
end//
delimiter ;//
commit;
set autocommit=0;
call innodb_insert_proc(7000);
commit;
set autocommit=1;
SET GLOBAL innodb_stats_sample_pages=1;
ANALYZE TABLE innodb_analyze;
SET GLOBAL innodb_stats_sample_pages=8;
ANALYZE TABLE innodb_analyze;
SET GLOBAL innodb_stats_sample_pages=16;
ANALYZE TABLE innodb_analyze;
SET GLOBAL innodb_stats_sample_pages=8000;
ANALYZE TABLE innodb_analyze;
DROP PROCEDURE innodb_insert_proc;
DROP TABLE innodb_analyze;
EVAL SET GLOBAL innodb_stats_sample_pages=$sample_pages;
EVAL SET GLOBAL innodb_stats_traditional=$traditional;