81 lines
2.5 KiB
Plaintext
81 lines
2.5 KiB
Plaintext
--echo #
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--echo # Bug#15923864 (Bug#67718):
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--echo # INNODB DRASTICALLY UNDER-FILLS PAGES IN CERTAIN CONDITIONS
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--echo #
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# InnoDB should try to insert to the next page before split,
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# if the insert record for split_and_insert is last of the page.
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# Otherwise, the follwing records 999,998,997 cause each page per record.
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#
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--disable_query_log
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SET @old_innodb_file_per_table = @@innodb_file_per_table;
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--enable_query_log
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SET GLOBAL innodb_file_per_table=ON;
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CREATE TABLE t1 (a BIGINT PRIMARY KEY, b VARCHAR(4096)) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (0, REPEAT('a', 4096));
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INSERT INTO t1 VALUES (1000, REPEAT('a', 4096));
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INSERT INTO t1 VALUES (1001, REPEAT('a', 4096));
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INSERT INTO t1 VALUES (1002, REPEAT('a', 4096));
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INSERT INTO t1 VALUES (1, REPEAT('a', 4096));
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INSERT INTO t1 VALUES (2, REPEAT('a', 4096));
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# | 0, 1, 2 | 1000, 1001, 1002|
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SELECT page_number, number_records
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FROM information_schema.innodb_tablespaces s1,
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information_schema.innodb_buffer_page s2,
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information_schema.innodb_tables s3
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WHERE s1.space = s2.space AND s3.name = 'test/t1'
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AND page_type = "INDEX" AND s1.space = s3.space
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ORDER BY page_number;
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INSERT INTO t1 VALUES (999, REPEAT('a', 4096));
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# try to insert '999' to the end of '0,1,2' page, but no space
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# the next '1000,1001,1002' page has also no space.
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# | 0, 1, 2 | 999 | 1000, 1001, 1002|
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SELECT page_number, number_records
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FROM information_schema.innodb_tablespaces s1,
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information_schema.innodb_buffer_page s2,
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information_schema.innodb_tables s3
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WHERE s1.space = s2.space AND s3.name = 'test/t1'
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AND page_type = "INDEX" AND s1.space = s3.space
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ORDER BY page_number;
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INSERT INTO t1 VALUES (998, REPEAT('a', 4096));
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# try to insert to the end of '0,1,2' page, but no space
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# the next '998' page has space.
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# | 0, 1, 2 | 998, 999 | 1000, 1001, 1002|
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SELECT page_number, number_records
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FROM information_schema.innodb_tablespaces s1,
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information_schema.innodb_buffer_page s2,
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information_schema.innodb_tables s3
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WHERE s1.space = s2.space AND s3.name = 'test/t1'
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AND page_type = "INDEX" AND s1.space = s3.space
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ORDER BY page_number;
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INSERT INTO t1 VALUES (997, REPEAT('a', 4096));
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# same
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# | 0, 1, 2 | 997, 998, 999 | 1000, 1001, 1002|
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SELECT page_number, number_records
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FROM information_schema.innodb_tablespaces s1,
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information_schema.innodb_buffer_page s2,
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information_schema.innodb_tables s3
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WHERE s1.space = s2.space AND s3.name = 'test/t1'
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AND page_type = "INDEX" AND s1.space = s3.space
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ORDER BY page_number;
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DROP TABLE t1;
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--disable_query_log
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SET GLOBAL innodb_file_per_table = @old_innodb_file_per_table;
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--enable_query_log
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