Last updated on August 28th, 2018 at 11:04 am
Varnish cache is the reverse proxy. It works from the server side. It was released by its developer in 2006. It increases the performance of website delivery to clients. It speeds up website delivery. It is used by many top sites. This website uses server-side varnish cache for better user experience.
It reduces pressure on the central processing unit of servers. It protects the website from denial of service (DoS) attacks. It protects origin server from being affected with too much of flood of requests.
CACHE MISS and CACHE HITS of Varnish server:
It keeps expensive computations on memory and it works from standard HTTP ports (80). It works in between client and server and it takes the more computations requirements and then send it to server side and then to the client side. The CACHE MISS of Varnish cache when the first time visitor requested URL, then it should be loaded from the origin server, and in this instance, it is called as CACHE MISS.
Then slowly, that URL is cached by Varnish and this means now it is stored inside the memory of Varnish cache. Now, it can be directly served from RAM the random access memory of origin server and does not need to be contacted with the origin server. This is called as CACHE HIT. It I have done within milliseconds and the delay in response time is never known to users of clients. In this way, origin server and database is well protected from future server and database requests.
Scopes of Varnish Cache:
Varnish cache works in a threaded manner. This means it can handle more requests than origin servers. It can handle more than two lacs requests per second. It works with RAM and its memory cache and if the size of RAM of the server is limited then also the speed of accepting requests by Varnish cache is also limited. The range of Varnish cache works in terms of header manipulations, scripting and throttling of requests forever from client sides.
With arrangements of the certain cookie set up, we can configure Varnish to accept which cache and can bypass to origin server which type of cache to make it fast and run flawlessly. When we update articles of the website then purging of cache is the necessity. For this, it is important to understand the purging of cache needs to be done automatically within the framework of the Varnish cache.
Most of the times, the installation of Varnish cache is done automatically from the server side. When I first started my website, the server of my internet company does not offer it but after three years of constant use, now it is offering Varnish cache to speeds up website performance. It works nicely in the case of network latency and server load times.
The simplicity attached with the installation of Varnish server as it does not need to be configured what the ports on its either side is considerate too. That is why it is very easier to configure and manage. There are no shortcuts to optimise server performance. It is a straightforward science and with the help of one’s experience, we can easily extract superior performance of servers.
The optimising website for speed:
In order to optimise a website so that speed of loading of the website on the client side from origin server should be maximum. It is directly related to the total number of requests, total page size and total time of loading of the website.
If after performing all such optimisation still the loading times of the website lags then one should examine server-side performance. Whether there is any such resource-hungry application is present or not, the performance of the database is not at par to the satisfaction level and last not the least is the presence of haphazard RAM in the original server.
This can greatly affect page loading times of website to a considerable extent. This is why the presence of server resource management and caching solutions like Varnish is the great tool for webmasters. Use of good content delivery network (CDN) like CloudFlare also could make the loading of page times in order to increase page speed to a good measurement.
Using Background processing to speed up page load times:
With the presence of background tasks for the website, the presence of heavy processing of websites that to be done in the background in order to speeds up website performance. Suppose your website presence with a video to be referred and most of the times users need to wait for entire videos to be rendered but in this case, good background tasks of managing buffering of videos can speed up website performance and user experience.
Most of the applications such as website generates job queue and workers. The process waits for workers to handles job ques and mostly one at a time. Here, the need of the hour is to create different threaded instances. Big jobs can be divided into small jobs and then these can be multiplied into several jobs in different ones. Presence of multiple worker instances which is generally known as processes could further improve server performances.
In this way, multiple tasks are taken care of efficiently. Latency times for server is well taken care of. Enabling Cloudflare content delivery network enables algorithm of the website run smoothly and it prevents floods of spams and denial of service attacks. Cloudflare when activated through the domain name system, it stays in between origin server and clients and in this way able to handle requests efficiently.
It works as the proxy between the origin server and incoming traffic so it manages traffic efficiently. CloudFlare also caches user’s version of the website so that when your website is down still it loads the website front page so as to make it online always. In the case of presence of outrage in origin server for some time still incoming traffic of website able to handle server request efficiently for quite sometimes.
In this way, the reputations of your website stay intact and able to handle such minimal outrages quite easily. In the case of heavy page-load times, and server errors still visitors able to access page cache of your website. Cloudflare also provides flexible HTTPS certificate connectivity for free. Most the website rendering from Cloudflare will come as secured and encrypted connectivity whereas the connection between the origin server and Cloudflare will go unencrypted.
In the era of faster computing and superfast internet we do see the presence of large chunk of botnet attacks on servers and make it down in terms of brute force attacks we do find that with the presence of proxy servers or content delivery networks such as Cloudflare and others we will be able to save website from such malicious attacks.
Finally, in programming set up, there is a golden rule to consider all the time does not use unless there is a proper reason to do it. Most of the skilled coder exceptionally omitted such instances to present a proper and dynamic presence of coding that works in a simple manner. It is important to prune code of your website and stay as much needed and nothing lesser to it. This way, you can also speed up the website as well as it is important to back up your website and its files before editing it.
It is important to choose a better and secure data model as well as it is significant to do away with meta queries as much as possible. Use a single query to fetch all articles of your website so that it loads faster and does not significantly reduce the performance of servers.