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diff --git a/doc/config-performance.rst b/doc/config-performance.rst new file mode 100644 index 0000000..9df0f93 --- /dev/null +++ b/doc/config-performance.rst @@ -0,0 +1,36 @@ +.. SPDX-License-Identifier: GPL-3.0-or-later + +.. _performance: + +************************** +Performance and resiliency +************************** + +For DNS resolvers, the most important parameter from performance perspective +is cache hit rate, i.e. percentage of queries answered from resolver's cache. +Generally the higher cache hit rate the better. + +Performance tunning should start with cache :ref:`cache_sizing` +and :ref:`cache_persistence`. + +It is also recommended to run :ref:`systemd-multiple-instances` (even on a +single machine!) because it allows to utilize multiple CPU threads and +increases overall resiliency. + +Other features described in this section can be used for fine-tunning +performance and resiliency of the resolver but generally have much smaller +impact than cache settings and number of instances. + +.. toctree:: + :maxdepth: 1 + + daemon-bindings-cache + systemd-multiinst + modules-predict + modules-prefill + modules-serve_stale + modules-rfc7706 + modules-priming + modules-edns_keepalive + daemon-bindings-net_xdpsrv + |