GraphQL is a query language and server-side runtime for APIs, designed to give clients the specific data they need and make it easier to aggregate data from multiple sources. It aims to make APIs fast and flexible, and so is a common feature in the web stack of high traffic websites and e-commerce platforms. In these environments it’s often used to do things like fetch real-time price information and stock levels.

In this week's 2-Minute Tech Tuesday we'll be talking about "purging", which is Varnish's built-in mechanism to remove non-expired objects from the cache.

This episode of Two Minute Tech Tuesdays is about request coalescing, a core feature in Varnish that is used to reduce the stress on origin servers when multiple requests are trying to fetch the same uncached content.

In this week's episode of Two Minute Tech Tuesdays, we're looking at parallel ESI (Edge Side Includes).