InnoDB keeps hot data in memory on its buffer named InnoDB Buffer Pool. For a long time, when a MySQL instance needed to bounce, this hot cached data was lost and the instance required a warm-up period to perform as well as it did before the service restart. That is not the case anymore. Newer [&]

https://www.percona.com/blog/2019/02/26/percona-xtrabackup-now-supports-dump-of-innodb-buffer-pool/