The common wisdom with database performance management is that a “cold” database server has poor performance. Then, as it “warms up”, performance improves until finally you reach a completely warmed up state with peak database performance. In other words, that to get peak performance from MySQL you need to wait for database warm up. This [&]

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https://www.percona.com/blog/2018/07/10/when-database-warm-up-is-not-really-up/