diff --git a/web/src/main/java/com/navercorp/pinpoint/web/service/AgentInfoServiceImpl.java b/web/src/main/java/com/navercorp/pinpoint/web/service/AgentInfoServiceImpl.java
index be97060c4099..511381345f19 100644
--- a/web/src/main/java/com/navercorp/pinpoint/web/service/AgentInfoServiceImpl.java
+++ b/web/src/main/java/com/navercorp/pinpoint/web/service/AgentInfoServiceImpl.java
@@ -175,11 +175,13 @@ public AgentsMapByHost getAgentsListByApplicationName(AgentStatusFilter agentSta
                 agentInfoAndStatuses
         );
 
-        int total = agentsMapByHost.getAgentsListsList()
-                .stream()
-                .mapToInt(list -> list.getInstancesList().size())
-                .sum();
-        logger.debug("getAgentsMapByHostname={} {}", agentsMapByHost, total);
+        final int totalAgentCount = agentsMapByHost.size();
+        if (logger.isInfoEnabled()) {
+            logger.info("getAgentsMapByHostname size:{}", totalAgentCount);
+        }
+        if (logger.isDebugEnabled()) {
+            logger.debug("getAgentsMapByHostname size:{} data:{}", totalAgentCount, agentsMapByHost);
+        }
         return agentsMapByHost;
     }
 
diff --git a/web/src/main/java/com/navercorp/pinpoint/web/vo/tree/AgentsMapByHost.java b/web/src/main/java/com/navercorp/pinpoint/web/vo/tree/AgentsMapByHost.java
index f11266ba07d7..8ccd58c731ed 100644
--- a/web/src/main/java/com/navercorp/pinpoint/web/vo/tree/AgentsMapByHost.java
+++ b/web/src/main/java/com/navercorp/pinpoint/web/vo/tree/AgentsMapByHost.java
@@ -66,6 +66,10 @@ private static AgentStatusAndLink newAgentStatusAndLink(AgentAndStatus agentAndS
         return new AgentStatusAndLink(agentInfo, status, hyperLinks);
     }
 
+    public int size() {
+        return instancesListMap.size();
+    }
+
     @Override
     public String toString() {
         return "AgentsMapByHost{" +
diff --git a/web/src/main/java/com/navercorp/pinpoint/web/vo/tree/InstancesListMap.java b/web/src/main/java/com/navercorp/pinpoint/web/vo/tree/InstancesListMap.java
index 410075cc7cc0..b14d8b29cd19 100644
--- a/web/src/main/java/com/navercorp/pinpoint/web/vo/tree/InstancesListMap.java
+++ b/web/src/main/java/com/navercorp/pinpoint/web/vo/tree/InstancesListMap.java
@@ -51,10 +51,18 @@ public List<InstancesList<T>> getListMap() {
         return listMap;
     }
 
+    public int size() {
+        return listMap.stream()
+                .map(InstancesList::getInstancesList)
+                .mapToInt(List::size)
+                .sum();
+    }
+
     @Override
     public String toString() {
         return "InstancesListMap{" +
                 "listMap=" + listMap +
                 '}';
     }
+
 }