When query caching is enabled, Grafana temporarily stores the results of data source queries. When you or another user submit the exact same query again, the results will come back from the cache instead of from the data source (like Splunk or ServiceNow) itself.
Query caching currently works for all backend data sources. You can enable the cache globally and configure the cache duration (also called Time to Live, or TTL). The cache can either be in-memory or in Redis.
To enable and configure query caching, please refer the the [Query caching section of Enterprise Configuration]({{< relref "./enterprise-configuration.md#caching" >}}).
If the data source query request contains an `X-Cache-Skip` header, then Grafana skips the caching middleware, and does not search the cache for a response. This can be particularly useful when debugging data source queries using cURL.