Different caches.
The server.xml flags regulate Tomcat's cache of static resources
typically delivered by the DefaultServlet.
See docs related to that.
Roller caches constructed web pages.
Horatia wrote:
I have this values inside server.xml, host-element:
cachingAllowed="true"
cacheMaxSize="40960"
cacheObjectMaxSize="1024"
cacheTTL="600000"
http://tomcat.apache.org/tomcat-6.0-doc/config/context.html
Roller runs with the default values.
As I can see tomcat serves the roller pages very fast.
Horatia