diff --git a/src/op_cache.h b/src/op_cache.h
index 51668157..b083e358 100644
--- a/src/op_cache.h
+++ b/src/op_cache.h
@@ -51,8 +51,8 @@ public:
     }
 
     bool onValue(const std::vector<Sp<Value>>& vals, bool expired, const system_clock::time_point& t = system_clock::time_point::min()) {
-        return expired 
-            ? onValuesExpired(vals, t) 
+        return expired
+            ? onValuesExpired(vals, t)
             : onValuesAdded(vals, t);
     }
 
@@ -74,6 +74,7 @@ public:
     std::vector<Sp<Value>> get(const Value::Filter& filter) const;
     Sp<Value> get(Value::Id id) const;
     std::vector<Sp<Value>> getValues() const;
+    size_t size() const { return values.size(); }
 
 private:
     OpValueCache(const OpValueCache&) = delete;
@@ -145,6 +146,10 @@ public:
     }
     time_point getExpiration() const;
 
+    size_t size() const {
+        return cache.size();
+    }
+
     size_t searchToken;
 private:
     constexpr static const std::chrono::seconds EXPIRATION {60};
@@ -176,6 +181,13 @@ public:
     std::vector<Sp<Value>> get(const Value::Filter& filter) const;
     Sp<Value> get(Value::Id id) const;
 
+    std::pair<size_t, size_t> size() const {
+        size_t tot = 0;
+        for (const auto& c : ops)
+            tot += c.second->size();
+        return {ops.size(), tot};
+    }
+
 private:
     SearchCache(const SearchCache&) = delete;
     SearchCache& operator=(const SearchCache&) = delete;
diff --git a/src/search.h b/src/search.h
index b7a5ffcb..3212bb2c 100644
--- a/src/search.h
+++ b/src/search.h
@@ -124,6 +124,14 @@ struct Dht::SearchNode {
         return last_get_reply + Node::NODE_EXPIRE_TIME;
     }
 
+    friend std::ostream& operator<< (std::ostream& s, const SearchNode& node) {
+        s << "getStatus:" << node.getStatus.size()
+            << " listenStatus:" << node.listenStatus.size()
+            << " acked:" << node.acked.size()
+            << " cache:" << (node.listenStatus.empty() ? 0 : node.listenStatus.begin()->second.cache.size()) << std::endl;
+        return s;
+    }
+
     /**
      * Could a particular "get" request be sent to this node now ?
      *
@@ -417,6 +425,18 @@ struct Dht::Search {
         }
     }
 
+    friend std::ostream& operator<< (std::ostream& s, const Search& sr) {
+        auto csize = sr.cache.size();
+        s << "announce:" << sr.announce.size()
+            << " gets:" << sr.callbacks.size()
+            << " listeners:" << sr.listeners.size()
+            << " cache:" << csize.first << ',' << csize.second << std::endl;
+        s << "nodes:" << std::endl;
+        for (const auto& n : sr.nodes)
+            s << *n;
+        return s;
+    }
+
     /**
      * @returns true if the node was not present and added to the search
      */
diff --git a/src/value_cache.h b/src/value_cache.h
index b168ee6e..8870e081 100644
--- a/src/value_cache.h
+++ b/src/value_cache.h
@@ -142,6 +142,10 @@ public:
         }
     }
 
+    size_t size() const {
+        return values.size();
+    }
+
 private:
     // prevent copy
     ValueCache(const ValueCache&) = delete;