From: Zac Dover Date: Tue, 28 May 2024 16:27:53 +0000 (+1000) Subject: doc/dev: add note about intro of perf counters X-Git-Tag: v18.2.5~646^2 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F57758%2Fhead;p=ceph.git doc/dev: add note about intro of perf counters Add a note to the "perf counter" section of doc/dev/perf_counters.rst that explains that this feature was introduced in the Reef release of Ceph. This note will prevent us from accidentally backporting perf-counter-related PRs to Quincy. Signed-off-by: Zac Dover (cherry picked from commit 55e41bc679aeee9119dc815b456bb76880f61ea2) --- diff --git a/doc/dev/perf_counters.rst b/doc/dev/perf_counters.rst index 012c0a6243ff..03ac92e0ed20 100644 --- a/doc/dev/perf_counters.rst +++ b/doc/dev/perf_counters.rst @@ -4,6 +4,8 @@ Perf counters =============== +.. note:: Perf counters were introduced in the Reef release of Ceph. + The perf counters provide generic internal infrastructure for gauges and counters. The counted values can be both integer and float. There is also an "average" type (normally float) that combines a sum and num counter which can be divided to provide an average. The intention is that this data will be collected and aggregated by a tool like ``collectd`` or ``statsd`` and fed into a tool like ``graphite`` for graphing and analysis. Also, note the :doc:`../mgr/prometheus` and the :doc:`../mgr/telemetry`.