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Instead of writing the high-level redo log records MLOG_LIST_END_COPY_CREATED, MLOG_COMP_LIST_END_COPY_CREATED write log for each individual insert of a record. page_copy_rec_list_end_to_created_page(): Remove. This will improve the fill factor of some pages. Adjust some tests accordingly. PageBulk::init(), PageBulk::finish(): Avoid setting bogus limits to PAGE_HEAP_TOP and PAGE_N_DIR_SLOTS. Avoid accessor functions that would enforce these limits before the correct ones are set at the end of PageBulk::finish().
59 lines
1.7 KiB
Plaintext
59 lines
1.7 KiB
Plaintext
#
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# Bug#15923864 (Bug#67718):
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# INNODB DRASTICALLY UNDER-FILLS PAGES IN CERTAIN CONDITIONS
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#
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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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SELECT page_number, number_records
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FROM information_schema.innodb_sys_tablespaces s1,
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information_schema.innodb_buffer_page s2
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WHERE s1.space = s2.space AND name = 'test/t1'
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AND page_type = "INDEX" ORDER BY page_number;
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page_number number_records
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3 3
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4 3
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5 1
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6 2
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INSERT INTO t1 VALUES (999, REPEAT('a', 4096));
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SELECT page_number, number_records
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FROM information_schema.innodb_sys_tablespaces s1,
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information_schema.innodb_buffer_page s2
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WHERE s1.space = s2.space AND name = 'test/t1'
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AND page_type = "INDEX" ORDER BY page_number;
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page_number number_records
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3 3
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4 3
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5 1
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6 3
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INSERT INTO t1 VALUES (998, REPEAT('a', 4096));
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SELECT page_number, number_records
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FROM information_schema.innodb_sys_tablespaces s1,
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information_schema.innodb_buffer_page s2
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WHERE s1.space = s2.space AND name = 'test/t1'
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AND page_type = "INDEX" ORDER BY page_number;
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page_number number_records
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3 4
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4 3
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5 1
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6 3
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7 1
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INSERT INTO t1 VALUES (997, REPEAT('a', 4096));
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SELECT page_number, number_records
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FROM information_schema.innodb_sys_tablespaces s1,
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information_schema.innodb_buffer_page s2
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WHERE s1.space = s2.space AND name = 'test/t1'
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AND page_type = "INDEX" ORDER BY page_number;
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page_number number_records
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3 4
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4 3
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5 1
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6 3
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7 2
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DROP TABLE t1;
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