Dealing with one-timer-documents in Web caching

A proper initialization requires starting the process in a state close to the expected steady state. In Web caching, the initialization problem is faced each time a new document enters the cache. Independently of the method used to sort the documents into the cache, the newly referenced document is inserted in a so called "removal-list", from which documents are removed when storage space is needed. Often, undesirable documents are assigned a high priority, consequently these documents remain for quite a long time in the cache, leading to a decrease in cache server performances. We investigate one category of undesirable documents, which pass the filters commonly used to control the cache processing.