Add warning

diff --git a/docs/markdown/authoritative/backend-geoip.md b/docs/markdown/authoritative/backend-geoip.md
index 0501160cf915512daa2e3d299348409115a96fd6..d0f2591e61d19861833ac8975cfadaa59e7f8eb8 100644 (file)
--- a/docs/markdown/authoritative/backend-geoip.md
+++ b/docs/markdown/authoritative/backend-geoip.md
@@ -102,3 +102,11 @@ domains:
 * From 4.0.0, You can add per-network overrides for format, they will be formatted with the same placeholders as default. Default is short-hand for adding 0.0.0.0/0 and ::/0. Default is default when only string is given for service name.
 * From 4.0.0, You can use array to specify return values, works only if you have those records specified. It matches the format results to your records, and if it finds match that is used. Otherwise the last is returned.
 * From 4.0.0, You can apply all the attributes for the content of static records too.
+
+**WARNING**: If you use ip or time/date specifiers, caching will be disabled for that RR completely. That means, if you have a
+
+  something.example.com:
+    - a: 1.2.3.4
+    - txt: "your ip is %ip"
+
+then caching will not happen for any records of something.example.com. If you need to use TXT for debugging, make sure you use dedicated name for it.