In the presence of thousands of tables, it can be checked if a higher value of innodb-open-files helps here (since by default it is a LRU of size 768) and if xtrabackup checks that variable.
In the presence of thousands of tables, it can be checked if a
higher value of innodb-open-files helps here (since by default
it is a LRU of size 768) and if xtrabackup checks that variable.