rationale why cache-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 4aedde81a1b20a9a41193b32aa0eb43f134845c2..4eda04610485b41bce1af50496e53bf66d4b40b5 100644 (file)
--- a/pdns/recursordist/docs/metrics.rst
+++ b/pdns/recursordist/docs/metrics.rst
@@ -239,6 +239,7 @@ counts the number of queries to locally hosted authoritative zones (:ref:`settin
 cache-bytes
 ^^^^^^^^^^^
 size of the cache in bytes (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.
 
 cache-entries
 ^^^^^^^^^^^^^