diff --git a/library/roles/unbound-resolver/defaults/main.yml b/library/roles/unbound-resolver/defaults/main.yml
index ab3782f0..20bb1a94 100644
--- a/library/roles/unbound-resolver/defaults/main.yml
+++ b/library/roles/unbound-resolver/defaults/main.yml
@@ -18,3 +18,14 @@ unbound_threads: '{{ ansible_processor_count }}'
 
 unbound_remote_control: 'yes'
 unbound_remote_IP: '127.0.0.1'
+
+unbound_rrset_cache_size: 100m
+unbound_rrset_msg_cache_size: 50m
+# Larger socket buffer.  OS may need config.
+unbound_so_rcvbuf: 4m
+unbound_so_sndbuf: 4m
+# Faster UDP with multithreading (only on Linux).
+unbound_so_reuseport: 'yes'
+# with libevent
+unbound_outgoing_range: 8192
+unbound_num_queries_per_thread: 4096
diff --git a/library/roles/unbound-resolver/templates/unbound-server.conf b/library/roles/unbound-resolver/templates/unbound-server.conf
index 07f09e3e..e955d899 100644
--- a/library/roles/unbound-resolver/templates/unbound-server.conf
+++ b/library/roles/unbound-resolver/templates/unbound-server.conf
@@ -21,22 +21,22 @@ server:
         key-cache-slabs: {{ unbound_threads }}
 
         # more cache memory, rrset=msg*2
-        rrset-cache-size: 100m
-        msg-cache-size: 50m
+        rrset-cache-size: {{ unbound_rrset_cache_size }}
+        msg-cache-size: {{ unbound_rrset_msg_cache_size }}
 
         # more outgoing connections
         # depends on number of cores: 1024/cores - 50 
-        outgoing-range: {{ 1024 / unbound_threads - 50 }}
+        outgoing-range: {{ 1024 // unbound_threads - 50 }}
 
         # Larger socket buffer.  OS may need config.
-        so-rcvbuf: 4m
-        so-sndbuf: 4m
+        so-rcvbuf: {{ unbound_so_rcvbuf }}
+        so-sndbuf: {{ unbound_so_sndbuf }}
 
         # Faster UDP with multithreading (only on Linux).
-	so-reuseport: yes
+	so-reuseport: {{ unbound_so_reuseport }}
         # with libevent
-        outgoing-range: 8192
-        num-queries-per-thread: 4096 
+        outgoing-range: {{ unbound_outgoing_range }}
+        num-queries-per-thread:  {{ unbound_num_queries_per_thread }}
 {% if ansible_service_mgr == 'systemd' %}
         use-systemd: yes
         do-daemonize: no