On Wed, Aug 09, 2006, huang mingyou wrote: > oh,but I limited the max size of the object that can be cached to 1024 KB. > and ,I set to 70% of the disk size ,it will ok? How big is the disk? 70% of 10 gigabytes is different to 70% of 50 gigabytes. The former doesn't have much room for trying to maintain low fragmentation under high load, the latter does. Adrian