PreFetchSize

The valid values for this parameter are the numbers zero (0) to seven (7), where a value of 0 means no pages are retrieved in the background. The default is 7.

When the display is set to Fit To Height and only a single page is displayed, the prefetchSize parameter value determines how many pages before and how many pages after the currently displayed page are retrieved in the background.

When the display is zoomed so that only part of a page is displayed (or multiple pages), the prefetchSize parameter value determines how many multiples of that displayed area are considered for retrieving in the background before and after the currently displayed area. Wherever a partial page is within the calculated prefetch area then the whole page is retrieved.

This parameter allows integrators to tune the IBM® Daeja® ViewONE Virtual product to the behavior that is most suitable depending on their network characteristics, such as bandwidth.

The different settings of this parameter are directly linked to changes in the network traffic between client and server systems. This parameter also affects the speed and overall experience of the page to page navigation within multi page documents. The parameter also applies where the Page<N> parameter is used to load pages of a document.

This parameter has no effect when rendering PDF documents with the HTML parameter clientPDFTileGeneration set to true. However, it is still applicable to the rendering of other MIME types.

<param name="PreFetchSize" value="3" />