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How preFetchSize parameter setting works

Product Documentation


Abstract

This parameter specifies the pages that will be retrieved in the background but it is important to understand that actual number of pages retrieved is impacted by the current zoom level.

Content

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, or multiple pages are, displayed, 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 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. (note: 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". It is however still applicable to the rendering of other MIME types.

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Document Information

Modified date:
28 January 2021

UID

ibm10737269