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1.2.5 Reduce thread/process switches and CPU load
Caching can effectively contribute to large reductions in CPU usage, particularly in the application servers and back-end subsystems. Caching can significantly free up worker threads running within the Web, application, and database tiers depending on where the caching has been implemented. By off loading work activities from these servers, the entire system copes better with much larger volumes of requests. As demand increases, cached applications generally scale better since they only have to deal with new data requests or provide update type services.