Major Description
As discussed at http://markmail.org/message/lq4lkfxi5whb5clr the second level page store/cache is not efficient with its default size of 40 pages.
It is better to disable the cache by default and let the application developers to decide whether to enable it.
For applications that use the browser history (back button) more often the cache would help. The size of the cache depends on the number of the concurrent users of the application.
