A high uptime database system means that a database system is meant to exceed a standard, level of availability, typically defined in a standard service level agreement. Uptime refers to the database being available without interruptions or downtimes. This is done by eliminating any single point of failure, having reliable crossover and proactively monitoring any potential failures.

For example, high uptime NoSQL databases are designed to operate without any service operation. Web-based businesses require such databases so that the operation is uninterrupted 24/7. For businesses, it can be a key feature since downtime can cost money and customers.

See also high availability database.