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Setting limits to slave numbers in MySQL 5.0

How many slaves can be set with MySQL 5.0? We plan to set a configuration with a single master on many boxes serving as slaves, but we have to know tha maximum number of slaves that can be set to avoiding troubles on the master side.

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Generally traffic from slave machines has a minimal impact on the master. The presence of more slaves generally accompanies an increase in INSERT/UPDATE/DELETE operations on the master as traffic increases. The capacity of a given master depends on its configuration and capabilities, but I can say that I have seen configurations with dozens of slaves to a single master. Those looking to decrease load on the master can use a tiered approach, with some slaves feeding others.

This was first published in May 2006

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