LRU dump backup

Percona XtraBackup includes a saved buffer pool dump into a backup to enable reducing the warm up time. It restores the buffer pool state from ib_buffer_pool file after restart. Percona XtraBackup discovers ib_buffer_pool and backs it up automatically.

../_images/lru_dump.png

If the buffer restore option is enabled in my.cnf buffer pool will be in the warm state after backup is restored.

See also

MySQL Documentation: Saving and Restoring the Buffer Pool State
https://dev.mysql.com/doc/refman/8.0/en/innodb-preload-buffer-pool.html