Editing Performance tuning (section)

== Load balancing ==
{{main article|Load balancing (computing)}}

A system can consist of independent components, each able to service requests.  If all the requests are serviced by one of these systems (or a small number) while others remain idle then time is wasted waiting for used system to be available.  Arranging so all systems are used equally is referred to as [[Load balancing (computing)|load balancing]] and can improve overall performance.

Load balancing is often used to achieve further gains from a distributed system by intelligently selecting which machine to run an operation on based on how busy all potential candidates are, and how well suited each machine is to the type of operation that needs to be performed.