32 lines
1.2 KiB
Plaintext
32 lines
1.2 KiB
Plaintext
-- Create an uncompressed table with a million or two rows. (3 millions row)
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CREATE TABLE big_table AS SELECT * FROM information_schema.columns;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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INSERT INTO big_table SELECT * FROM big_table;
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-- How many rows does this has?
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SELECT count(*) FROM information_schema.columns;
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-- Create a new table that is the same but compressed
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CREATE TABLE key_block_size_8 LIKE big_table;
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ALTER TABLE key_block_size_8 key_block_size=8 row_format=compressed;
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-- Insert 3 millions row into the table to compressed
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INSERT INTO key_block_size_8 SELECT * FROM big_table;
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commit;
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drop table key_block_size_4;
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SELECT * FROM information_schema.INNODB_CMP;
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SELECT * FROM information_schema.INNODB_CMPMEM;
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select count(*) as count_row from big_table;
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select count(*) as count_row from key_block_size_8; |