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.. SPDX-License-Identifier: GPL-3.0-or-later
.. _mod-prefetch:
Expiring records
----------------
The ``prefetch`` module helps to keep the cache hot by prefetching expiring records.
This mechanism is activated when the module is loaded and it is not configurable.
.. code-block:: lua
modules.load('prefetch')
Any time the resolver answers with records that are about to expire, they get refreshed. (see :c:func:`is_expiring`)
That improves latency for records which get frequently queried, relatively to their TTL.
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