Load testing is utilized in a vast array of ways in the community of software testing that is done by professionals. It generally refers to modeling practices which consists of expected utilization of software programs by mimicking multiple users who access the program together. This particular instance of testing has been known to be the most relevant for systems that allow multi-users, often those of which are built utilizing a model that is designed with client/server protocols. A graphics editor or word processor can be forced to analyze large documents; or financial packages that can enforced to produce a report that is compiled from many years’ worth of information. Accurate load testing that is most accurate has an effect of simulating true usage, as opposed to analyzing using analytical or theoretical modeling.

Load testing allows one to measure the QOS performance measures of websites that are derived from actual instances of behavior from customers. Approximately all of the frame-works and load testing tools follow the paradigms of classical load testing. This occurs when customers visit a website, a recorder captures the communication in a recording, which then creates interaction scripts that are related. Load generators attempt to replay scripts that are recorded, which can possibly be adjusted with divergent parameters of testing prior to replaying. In the procedures of replaying, both statistics of software and hardware are collected by the conductor upon monitoring. These particular stats include disk IO of physical servers and response times, memory, CPU, throughput of the SUT, which is an acronym for System Under Test, and etc. All of these stats are analyzed and load tested for reports to foster.

Performance and load testing has an effect of analyzing software that’s intended for an audience of multi-users by exposing the software program to contracting numbers of live and virtual users whilst supervising measurements of performance under loads that are different. Performance and load testing is often conducted in identical test environments to the environment of production prior to software systems being permitted to go into “live” mode.
Resources:

http://www8.hp.com/us/en/software-solutions/loadrunner-load-testing/

https://load-testing.io/what-is-load-testing/

https://www.causevox.com/blog/measure-nonprofit-website-performance/

https://webhostingbuddy.com/non-profit-web-hosting-guide/

https://tools.pingdom.com/

https://gtmetrix.com/