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MySQL benchmark SSD versus HDD

Running a WAMP server on a Windows 7 64 bits, CPU U7300 @ 1.3Ghz and 4GB RAM, I tried to benchmark the performance of searches in a big MyISAM MySQL database, 520k rows and 3.4Gb MYD file for data and 20Mb MYI file for the index.

In the first test MySQL files are stored in a Momentus Model ST9500325AS SATA 3Gb/s 500 GB HDD that yields a Random Read Seek Time of 14ms. The test consists on querying 1,000 random raws of a big table and measure the time elapsed after MySQL delivers the information. This test requires MySQL to make a lot of I/O operations to disk, so disk latency and Random Read Seek Time are determinant. The first bechmark in the HDD throws a result of 5.23 seconds, meaning 5 miliseconds per query on average.

Second test runs on a 32Gb LaCie iamaKey USB as a SSD Device. The benchmark yields a result of 2.15 seconds to extract 1,000 random rows from a big table. Meaning that SSD storage is twofold faster than HDD on MySQL search queries.

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