If your proxy is allocated less than 32 MB or so, and if your LAN users tend to surf very diverse sites, then the Cache Manager may provide superior performance. The RAM Cache is installed and ready to be used by default. However, if you have switched to using the WebDoubler disk-based cache, you will need to reload the RAM Cache. First, shut down WebDoubler. The RAM Cache will automatically use the RAM available to it, so to increase the size of your cache, increase the memory allocation given to WebDoubler.
Additional configuration is done by remote Web administration.
The decision whether or not to cache a particular object is controlled by the Cache Aggressiveness settings. Increased hit rates from more aggressive caching come at the price of sometimes serving stale content. By default, WebDoubler is very aggressive in serving files from cache to maximize performance. The Cache Aggressiveness settings let you, the administrator, choose the level that is best for your network and organization. Serving a response from the cache is completely acceptable in most cases, so this can lead to significantly increased cache hit rates with little risk of stale content.