What method is used to resolve connection performance issues by creating copies of a database?

Database replication is the method utilized to address connection performance issues by creating copies of a database. This process involves duplicating data from one database to another, which can be located on different servers or geographic locations. By doing so, it enhances access speed and reliability for users. When a certain database becomes overloaded with requests, having replicas allows the system to distribute those requests across multiple copies, alleviating pressure on the primary database.

Additionally, replication can improve data availability and disaster recovery options, ensuring that users can still access essential data even if one database instance fails. This makes the system more resilient and capable of handling higher loads, ultimately leading to improved performance in connection handling.

In contrast, other options like data warehousing focus more on aggregating and analyzing data from multiple sources rather than addressing performance issues through direct database copies. Database normalization is concerned with organizing data to reduce redundancy and improve data integrity, which does not directly impact connection performance. Distributed processing involves breaking down tasks across multiple processors or systems but does not specifically entail managing database copies.