Patent ID: 8810813

Claim:
A print document processing system comprising a cache apparatus and a plurality of data processing apparatuses, each of the plurality of data processing apparatuses including an image data creating unit that creates bitmap image data or intermediate language image data by processing page description language data of each document element of print document data, and a reservation request transmission unit that transmits a reservation request for reserving a storage area for the image data created by the image data creating unit to the cache apparatus, the cache apparatus including a cache memory that stores bitmap image data or intermediate language image data created by each of the data processing apparatuses, a memory that stores, for each document element whose image data is stored in the cache memory, use condition information and cache priority of the document element, the use condition information being information indicating whether or not the image data of the document element is currently being used by any of the data processing apparatuses, and an area reservation unit that upon receipt of a reservation request for reserving a storage area for image data of a first document element from a data processing apparatus among the data processing apparatuses, reserves the storage area by selecting a second document element as a document element to be evicted from the cache memory and evicting the selected second document from the cache memory, the second document element having a lower cache priority than the first document element and currently being used by any of the data processing apparatuses.