Increase MariaDB setting "max_heap_table_size" to "32M"
Increase MariaDB setting "max_heap_table_size" to "32M"

Both "tmp_table_size" and "max_heap_table_size" should be the same.
See <https://mariadb.com/kb/en/library/server-system-variables/#tmp_table_size>.

bheisig/i-doit-scripts