Since the days of the rental server which used physical server from the early age of web hosting, we have been using many different kinds of server.
Web server sizing according to the demand of customers is one of our strengths.
At the time of physical server, it was normal to prepare equipment with a little bit higher spec.
In order to support the increase of number of users and the adding of features after implementation, we would try to utilize the computer resources to 30%~40% after initial deployment. However, it would be so nervous when you enter the vmstat command because you need to confirm whether the sizing was correct or not.
As time passes, virtual server emerges and the difficulties of server sizing has been lowered. This is because when the load of CPU and memory has become higher than expected, an easier way to add the resources is needed. Though pressure would still exist as reflected by the price, but this kind of serious situation could be avoided.
For physical server, when the load of computer resources is above 80%, it would affect the speed of server response. Not only would users feel the slow speed, we would also receive requests to deal with the problem.
To support this threshold of 80%, virtual server has emerged. Even with the load of over 80%, we didn’t receive any complaints from users about slow server responses. Besides, when we try to double check with customers, they would tell us that there is no problem in particular.
To wrap up, virtual server which runs with rich background of IT resources (CPS, memory, HDD) can utilize the capacity of server better than physical server.
“The load of virtual server is different from that of physical server.”
Another advantage of using virtual server.