Varnish Cache is a software that provides caching and acceleration for web-based applications. Varnish Cache can also improve the performance of your website by reducing the amount of data sent to and from your web servers.

Varnish Cache is a software that provides caching for websites. Varnish Cache offers features such as front end acceleration, HTTP compression, and high availability. Varnish Cache can be installed on any type of server including Linux-based servers and it has a lot of flexibility when it comes to configuration settings.

When you install Varnish Cache on your server, you are able to cache web pages from visitors in order to save bandwidth and time on site maintenance. This means that visitors will not have to download the same page again when they come back later on or even future visits of the same page.

What are the Benefits of Using a Varnish Cache?

• A Varnish Cache is a caching HTTP reverse proxy server used by websites. It is usually implemented to improve the performance of websites by storing and serving content from a memory cache.
• Varnish Cache offers features like low-latency, high-throughput, high-availability with many other advantages that can also be found in traditional HTTP reverse proxies.
• Varnish Cache can reduce the load on web servers by storing static content in memory and thereby, minimizing the number of requests. The content stored in memory is served quickly and it’s always fresh.
• A Varnish Cache can also speed up the response time of a website.There are many benefits to using a Varnish Cache with WordPress.
• On the front end, our site will load more quickly because it’s not hitting the database as often.
• We won’t have to worry about the WordPress environment getting blogged down by a high number of requests.
• The Varnish cache will help our site stay secure by only storing data that’s changed since the last time it was requested

What are the Disadvantages of using a Varnish Cache?

• Varnish Cache requires a lot of CPU power to run and if you’re running on a Virtual Machine it might not be the best idea to use a Varnish Cache because they have a lot of overhead on the physical machine.
• Another disadvantage is that if your site is not cached it’ll feel slow because you can’t see any pages being served from cache.
• Some people argue that a Varnish Cache can also cause problems such as using too much memory and slowing down the website.

If you want to know more details about varnish cache, please download The Varnish Book which is originally published by the varnish software team.