List of best mirrors for IP address 52.14.204.52, located in an unknown country.
I am very sorry, but no mirror was found. Feel free to download directly:
http://mirrordirector-mb.raspbian.org/multiarch/pool/main/m/mariadb-10.3/mariadb-plugin-mroonga-dbgsym_10.3.23-1+b1_arm64.deb