diff --git a/06.PVE制作DNS服务器.md b/06.PVE制作DNS服务器.md
index d0b585b..723fd0c 100644
--- a/06.PVE制作DNS服务器.md
+++ b/06.PVE制作DNS服务器.md
@@ -345,6 +345,7 @@ rr-ttl-min 60
 rr-ttl-max 28800
 rr-ttl-reply-max 14400
 
+cache-size 32768
 force-qtype-SOA 65
 max-query-limit 1024
 max-reply-ip-num 24
diff --git a/src/debian/debian_dns_smartdns.conf b/src/debian/debian_dns_smartdns.conf
index 6de9e27..824b7ce 100644
--- a/src/debian/debian_dns_smartdns.conf
+++ b/src/debian/debian_dns_smartdns.conf
@@ -28,6 +28,7 @@ rr-ttl-min 60
 rr-ttl-max 28800
 rr-ttl-reply-max 14400
 
+cache-size 32768
 force-qtype-SOA 65
 max-query-limit 1024
 max-reply-ip-num 24