In most installations, the concurrent user count is much smaller than the total user base. You also need to consider the type of use the proxy server will see. A full-time web surfer can generate thousands of requests per day. On the other hand, someone who uses the web less frequently may only generate a few hundred requests in the same period. You need to consider the types of users in your organization and how they will use the proxy services.
Users request different types of content as well.
The increase in network traffic associated with larger objects must be accounted for when determining capacity requirements. Your highest load may occur at a few peak times. The proxy server must be sized to accommodate your peak load, but you need not calculate the peak load to do so. You just need to estimate the average load for a given day. T. The result, A total , is your average number of accesses per second.