What is Varnish?
Article Number: 943 | Rating: Unrated | Last Updated: Fri, Nov 11, 2016 at 12:45 PM
What is Varnish?
Varnish accelerates content-heavy websites. It is a reverse web proxy caching system that intercepts all queries before reaching the web server. Varnish focuses exclusively on websites created with HTTP and works with both static and dynamic content.
Many web requests produce an identical response, therefore a website will run more efficiently if these responses are cached rather than generated. Varnish stores its cache in virtual memory instead of on the hard drive, thereby conserving CPU resources otherwise consumed by these repeated requests. This accelerates the website's function as Varnish increases the rate at which it responds to requests.
Varnish primarily uses VCL and most policy decisions are made according to VCL code. This makes Varnish somewhat more adaptable than other HTTP accelerators; however, poor malloc or pthreads implementation will diminish its performance.
For proprietary information about Varnish, visit the Varnish Software website.
There are no attachments for this article.
How to patch your Magento store
Added on Mon, Jan 11, 2016
How to configure Magento to use your SSL certificate
Added on Mon, Feb 29, 2016
How to enable CAPTCHA for user creation in Magento 1.x
Added on Fri, Aug 18, 2017
How to configure CDN access for Magento
Added on Wed, May 16, 2018
How to conserve disk space in Magento
Added on Fri, Jan 17, 2014
How to set Magento file permissions
Added on Mon, Nov 3, 2014
How to issue a reindex in Magento
Added on Fri, Nov 15, 2013
How to disable caching in Magento
Added on Tue, Nov 5, 2013
How to improve Magento maintenance mode
Added on Mon, Feb 24, 2014
How to perform Magento database maintenance
Added on Tue, Jul 30, 2013