diff --git a/demo/recommendation/evaluate.py b/demo/recommendation/evaluate.py
new file mode 100755
index 0000000000000000000000000000000000000000..3afa7a1e9db5fefb1bbf5aaa174b8168afae4058
--- /dev/null
+++ b/demo/recommendation/evaluate.py
@@ -0,0 +1,37 @@
+#!/usr/bin/python
+# Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import sys
+import re
+import math
+
+
+def get_best_pass(log_filename):
+    with open(log_filename, 'r') as f:
+        text = f.read()
+        pattern = re.compile('Test.*? cost=([0-9]+\.[0-9]+).*?pass-([0-9]+)',
+                             re.S)
+        results = re.findall(pattern, text)
+        sorted_results = sorted(results, key=lambda result: float(result[0]))
+        return sorted_results[0]
+
+
+log_filename = sys.argv[1]
+log = get_best_pass(log_filename)
+predict_error = math.sqrt(float(log[0])) / 2
+print 'Best pass is %s, error is %s, which means predict get error as %f' % (
+    log[1], log[0], predict_error)
+
+evaluate_pass = "output/pass-%s" % log[1]
+print "evaluating from pass %s" % evaluate_pass
diff --git a/paddle/utils/ThreadLocal.cpp b/paddle/utils/ThreadLocal.cpp
index d27dae33fd039bbefdbc65908e5ce7dc58eceab7..58fe51bd40c36088fdc6ee51e22d120b63486bf4 100644
--- a/paddle/utils/ThreadLocal.cpp
+++ b/paddle/utils/ThreadLocal.cpp
@@ -37,7 +37,7 @@ unsigned int* ThreadLocalRand::getSeed() {
       p = new unsigned int(defaultSeed_ - 1);
     } else {
       p = new unsigned int(defaultSeed_ + getTID());
-      LOG(INFO) << "thread use undeterministic rand seed:" << *p;
+      VLOG(3) << "thread use undeterministic rand seed:" << *p;
     }
     seed_.set(p);
   }
diff --git a/paddle/utils/Util.cpp b/paddle/utils/Util.cpp
index 0f778dbebf4e124c7a240d738b8f73cef03fc477..411a64aa8d0737a8d57e62fbd0788ffaacfbc9f7 100644
--- a/paddle/utils/Util.cpp
+++ b/paddle/utils/Util.cpp
@@ -125,7 +125,7 @@ void registerInitFunction(std::function<void()> func, int priority) {
 
 void runInitFunctions() {
   std::call_once(g_onceFlag, []() {
-    LOG(INFO) << "Calling runInitFunctions";
+    VLOG(3) << "Calling runInitFunctions";
     if (g_initFuncs) {
       std::sort(g_initFuncs->begin(),
                 g_initFuncs->end(),
@@ -139,7 +139,7 @@ void runInitFunctions() {
       g_initFuncs = nullptr;
     }
     g_initialized = true;
-    LOG(INFO) << "Call runInitFunctions done.";
+    VLOG(3) << "Call runInitFunctions done.";
   });
 }
 
@@ -231,7 +231,7 @@ std::string join(const std::string& part1, const std::string& part2) {
 }  // namespace path
 
 void copyFileToPath(const std::string& file, const std::string& dir) {
-  LOG(INFO) << "copy " << file << " to " << dir;
+  VLOG(3) << "copy " << file << " to " << dir;
   std::string fileName = path::basename(file);
   std::string dst = path::join(dir, fileName);
   std::ifstream source(file, std::ios_base::binary);