What happens by default when you have more than one active index?

When multiple active indexes are present in a system, the default behavior is to choose the oldest active index for processing. This design is typically implemented to maintain performance and ensure that older indexes, which may contain more established data, are utilized first. By prioritizing the oldest active index, the system can optimize efficiency, particularly in environments where index sizes and data relevance may vary over time.

This choice also helps maintain historical accuracy in data retrieval and ensures that users can access data that has been in the system the longest, potentially reflecting the most stable and reliable information. The selection of the oldest active index is a strategic approach to manage the indexing process effectively while ensuring that newer indexes are not used in scenarios where historical data is paramount.

In contrast, selecting the most active, least active, or newest indexes would not align with the principle of prioritizing stability and historical data accuracy across operations.