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Which table option for MyISAM tables reduces index flushing?

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Which table option for MyISAM tables reduces index flushing?

(a) DELAY_KEY_WRITE

(b) DELAY_WRITE_KEY

(c) KEY_WRITE_DELAY

(d) WRITE_KEY_DELAY

This question was addressed to me in an interview for job.

Origin of the question is Loading Data Efficiently topic in chapter Query Optimization of MySQL

1 Answer

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Best answer
Correct choice is (a) DELAY_KEY_WRITE

Easy explanation: For MyISAM tables a strategy for reducing index flushing is to use the DELAY_KEY_WRITE table option. With this option the data rows are written to the data file immediately.

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