These days, relational databases are a popular solution for storing data. As your system continues to grow, you're likely to start storing more and more data. Queries become too slow, data unavailable, performance is poor, etc. But you can’t simply improve it by adding more CPU or memory. Here are some tips: Optimizing queries, adding indexes, reorganizing tables, adding foreign keys, updating statistics, re-packing tables, and removing constraints from the fields.