Which cache in Zabbix Server is responsible for storing historical data?

The History Cache in Zabbix Server is specifically designed to store historical data, which includes the collected metrics and performance data from the monitored hosts over time. This cache plays a crucial role in optimizing the retrieval and processing of historical data during operations such as graphing and reporting.

When Zabbix collects data from various monitored items, it temporarily holds this data in the History Cache to facilitate quick access and processing. This ensures that when users request historical data or view trends, the system can quickly provide the necessary information without having to continuously query the underlying database, improving overall performance and responsiveness.

In contrast, other cache types serve different purposes. The Value Cache holds the most recent values of items for faster access, the Config Cache stores the configuration of entities such as hosts and templates to reduce database queries, and the Data Cache is utilized to store intermediate data during processing tasks. Therefore, the History Cache is uniquely suited for the purpose of maintaining and managing historical monitoring data.