What is a common performance improvement to address slow query responses?

Adding more RAM to a system is a well-recognized method for improving performance, especially concerning slow query responses. When an application requires more memory than what is currently available, it may resort to swapping data between the RAM and disk storage, which is significantly slower. By increasing the amount of RAM, more data can be held in memory for faster access, leading to quicker query processing times.

This performance enhancement can significantly reduce the lag experienced during data retrieval operations, as more of the frequently accessed data can reside in fast-access memory instead of relying on the slower disk drive. This improvement is particularly beneficial in environments where heavy data processing occurs, and applications require rapid access to large datasets.

While other options may have their own benefits, they don't directly target the speed of query responses like increasing RAM does. For instance, adding disk space might help with storage capacity but wouldn't necessarily improve the speed of data retrieval. Similarly, increasing application licenses or reducing concurrent user access could affect performance indirectly, but they don't address the underlying data access and processing speeds as effectively as increasing RAM.