What are surge protection and performance assurance?
Surge protection and performance assurance represent two sides of the same coin. OracleAS Web Cache monitors the load on each origin Web server for which it caches content, providing a crucial buffer between client browsers and the mid-tier servers that house the application. A patent-pending capacity heuristic ensures that site performance remains at peak levels, even during traffic spikes (“surges”) or when content is changing frequently. OracleAS Web Cache achieves this by guaranteeing that origin Web servers do not receive more simultaneous requests than they can safely handle, and by varying the freshness of content served out of the cache. This degree to which “stale” content may be served during periods of heavy load is fully configurable at the time of content invalidation. Furthermore, when content is changing frequently and request loads are high, the capacity heuristic uses statistics like age and popularity to determine which objects to serve fresh and which objects to serv
