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BUG#22385442 - INNODB: DIFFICULT TO FIND FREE BLOCKS IN THE BUFFER POOL

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Problem:
We keep pinning pages in dict_stats_analyze_index_below_cur(),
but doesn't release these pages. When we have a relative small
buffer pool size, and big innodb_stats_persistent_sample_pages,
there will be no free pages for use.

Solution:
Use a separate mtr in dict_stats_analyze_index_below_cur(),
and commit mtr before return.

Reviewed-by: Jimmy Yang <jimmy.yang@oracle.com>
RB: 11362
This commit is contained in:
Shaohua Wang 2015-12-22 22:07:13 +08:00 • committed by Thirunarayanan Balathandayuthapani
parent 64d6a65ab2
commit a54b581d03
2 changed files with 67 additions and 0 deletions
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25
mysql-test/suite/innodb/r/analyze_table.result Normal file
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@ -0,0 +1,25 @@
CREATE PROCEDURE populate_t1()
BEGIN
DECLARE i int DEFAULT 1;
START TRANSACTION;
WHILE (i <= 1000000) DO
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
SET i = i + 1;
END WHILE;
COMMIT;
END|
CREATE TABLE t1(
class INT,
id INT,
title VARCHAR(100)
) ENGINE=InnoDB;
SELECT COUNT(*) FROM t1;
COUNT(*)
1000000
SET GLOBAL innodb_stats_persistent_sample_pages=2000;
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
DROP TABLE t1;
DROP PROCEDURE populate_t1;
SET GLOBAL innodb_stats_persistent_sample_pages=default;

42
mysql-test/suite/innodb/t/analyze_table.test Normal file
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#
# BUG#22385442 - INNODB: DIFFICULT TO FIND FREE BLOCKS IN THE BUFFER POOL
#
--source include/have_innodb.inc
--source include/big_test.inc
DELIMITER |;
CREATE PROCEDURE populate_t1()
BEGIN
DECLARE i int DEFAULT 1;
START TRANSACTION;
WHILE (i <= 1000000) DO
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
SET i = i + 1;
END WHILE;
COMMIT;
END|
DELIMITER ;|
CREATE TABLE t1(
class INT,
id INT,
title VARCHAR(100)
) ENGINE=InnoDB;
-- disable_query_log
CALL populate_t1();
-- enable_query_log
SELECT COUNT(*) FROM t1;
SET GLOBAL innodb_stats_persistent_sample_pages=2000;
ANALYZE TABLE t1;
DROP TABLE t1;
DROP PROCEDURE populate_t1;
SET GLOBAL innodb_stats_persistent_sample_pages=default;