It is suggesting these changes:
Variables to adjust:
query_cache_size = 20M
join_buffer_size = 2.0M
tmp_table_size = 48M
max_heap_table_size = 48M
table_cache = 6192
innodb_buffer_pool_size = 32M

also add:

log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time = 2
log-queries-not-using-indexes