Varnish Cache is a web accelerator, sometimes referred to as a HTTP accelerator or a reverse HTTP proxy, that will significantly enhance your web performance. Varnish Cache is really fast and usually speeds up delivery with a factor of 10x – 300x.Varnish is a web application accelerator. You install it in front of your web application and it will speed it up significantly.
Get the power and Flexibility of Varnish!
What differentiates Varnish from other web accelerators is its outstanding flexibility that allows you to adopt the software to your needs.
Varnish is one of the most cost effective alternatives for web acceleration you will find. Once you have an optimized version of Varnish up and running you can lower maintenance costs.
Relevant content that optimizes over time results in better customer conversion rates. Varnish will help you deliver all the dynamic content you want without the web performance suffering.
How does Varnish Cache Works?
Varnish is a reverse web proxy caching system. It basically acts as an operator or a security guard, by intercepting all web requests before they reach your web server (apache).Varnish is a proxy that sits between your HTTP server and the world. For example, when a request comes to your server for “example.com/index.php”, it first goes through Varnish who then checks to see if it has cached output for the requested URL. If it has cached the output of that specific request before, and it has not expired yet, Varnish will serve up the all ready, fully-generated output for that request from its cache stored in the RAM.As a result the request doesn’t even make it to Apache, PHP or MySQL, which is great for our server’s health and you get lightning fast responses.
Varnish speeds up a website by storing a copy of the page served by the web server the first time a user visits that page. The next time a user requests the same page, Varnish will serve the copy instead of requesting the page from the web server.This means that your web server needs to handle less traffic and your website’s performance and scalability go through the roof. In fact Varnish Cache is often the single most critical piece of software in a web based business.
Multiple PHP threads and database connections may produce high CPU consumption and increase response latency.
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