Cisco Headend Digital Broadband Delivery System Guia Do Utilizador
4002178 Rev C
Interactive Program Guide Options
6-13
Adjust How Set-Tops Use IPG Memory
Introduction
This section describes IPG Memory Usage settings that allow you to adjust how the
set-top uses IPG memory. These adjustments can be made on a site basis (or for
testing purposes, may be made on a hub basis). Adjusting these settings may enable
you to maximize memory usage, particularly on older, lower-memory set-tops, such
as Explorer 2000 set-tops. For detailed instructions on setting the IPG memory usage
settings, refer to the SARA Application Server 3.4.1 User's Guide.
Enhance Memory Allocation
You can enhance how the set-top uses IPG memory in three ways:
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Configure the amount of memory the IPG must leave free
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Configure Memory Thresholds
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Choose If or When the IPG Data Is Purged
We recommend that you keep the IPG memory usage variables at the default values.
If you want to adjust how the set-top uses IPG memory, call Cisco Broadband
Services for assistance.
Configure the Amount of Memory the IPG Must Leave Free
To allow for more memory for other applications, SARA has been modified so that
Configure the Amount of Memory the IPG Must Leave Free
To allow for more memory for other applications, SARA has been modified so that
you can specify the amount of memory the IPG leave free for other applications. The
set-top loads the Interactive Program Guide data in a progressive manner. Day 1 and
Day 2 of the grid data are loaded first. Then the set-top loads Day 1 and Day 2 long
descriptions. The set-top will then load the grid data for future dates depending
upon how much memory is available. The set-top will stop loading after there is less
than 512 KB of contiguous free memory or less than 750 KB total free memory. The
remaining unused memory is available for applications and operating system use.
Whenever more memory is needed by another application, the existing behavior for
the IPG daemon in the set-top is to release memory. The memory is released by
dropping IPG data while attempting to keep Day 1 and Day 2 of grid information
available.
Note: If you are not using Application Server 3.4.1, you cannot adjust how the set-
Note: If you are not using Application Server 3.4.1, you cannot adjust how the set-
top uses IPG memory.