rationale why packetcache-bytes is disabled by default

Co-authored-by: Remi Gacogne <github@coredump.fr>

diff --git a/pdns/recursordist/docs/metrics.rst b/pdns/recursordist/docs/metrics.rst
index 4eda04610485b41bce1af50496e53bf66d4b40b5..61e55fee88e69b4d1b45072e1a9d1c36e3890f27 100644 (file)
--- a/pdns/recursordist/docs/metrics.rst
+++ b/pdns/recursordist/docs/metrics.rst
@@ -574,6 +574,7 @@ questions dropped because over maximum   concurrent query limit (since 3.2)
 packetcache-bytes
 ^^^^^^^^^^^^^^^^^
 size of the packet cache in bytes (since 3.3.1) (disabled by default, see :ref:`setting-stats-rec-control-disabled-list`)
+This metric is a rough estimate and takes a long time to compute, and is therefore not enabled in default outputs.
 
 packetcache-entries
 ^^^^^^^^^^^^^^^^^^^