diff --git a/parl/remote/job.py b/parl/remote/job.py
index d4d8133da84caf514dfd69757808faaeb541ec93..4a49d51f79ab1f68f012e3a461ae110b0e12b1fc 100644
--- a/parl/remote/job.py
+++ b/parl/remote/job.py
@@ -180,7 +180,7 @@ class Job(object):
                     logger.error(
                         "Memory used by this job exceeds {}. This job will exist."
                         .format(self.max_memory))
-                    time.sleep(3)
+                    time.sleep(5)
                     socket.close(0)
                     os._exit(1)
             except zmq.error.Again as e:
diff --git a/parl/remote/monitor.py b/parl/remote/monitor.py
index 5511bdc391ede4de89807b0b9a11a4acbbc10590..8f5c1d5f1d4b4919b4230f27a7a656a1417f6d23 100644
--- a/parl/remote/monitor.py
+++ b/parl/remote/monitor.py
@@ -59,6 +59,9 @@ class ClusterMonitor(object):
 
                 status = pickle.loads(msg[1])
                 data = {'workers': [], 'clients': []}
+                total_vacant_cpus = 0
+                total_used_cpus = 0
+
                 master_idx = None
                 for idx, worker in enumerate(status['workers'].values()):
                     worker['load_time'] = list(worker['load_time'])
@@ -66,10 +69,17 @@ class ClusterMonitor(object):
                     if worker['hostname'] == 'Master':
                         master_idx = idx
                     data['workers'].append(worker)
+                    total_used_cpus += worker[
+                        'used_cpus'] if 'used_cpus' in worker else 0
+                    total_vacant_cpus += worker[
+                        'vacant_cpus'] if 'vacant_cpus' in worker else 0
+
                 if master_idx != 0 and master_idx is not None:
                     master_worker = data['workers'].pop(master_idx)
                     data['workers'] = [master_worker] + data['workers']
 
+                data['total_vacant_cpus'] = total_vacant_cpus
+                data['total_cpus'] = total_used_cpus + total_vacant_cpus
                 data['clients'] = list(status['clients'].values())
                 self.data = data
                 time.sleep(10)
diff --git a/parl/remote/static/js/parl.js b/parl/remote/static/js/parl.js
index a9d0d0bc1ebda01e84e634927f3b3cdf26bc56e7..117e2d5542e69213a0b4ae7e04d5b6c6533006c8 100644
--- a/parl/remote/static/js/parl.js
+++ b/parl/remote/static/js/parl.js
@@ -9,7 +9,7 @@ function createDivs(res, divs) {
       var workerDiv = document.createElement("div");
       workerDiv.id = `w${i}`;
       if (i === 0) {
-        workerDiv.innerHTML = `<p class="card-header" id="${i}">Master</p>`;
+        workerDiv.innerHTML = `<div class="card-header" id="${i}"><div style="display:inline;">Master</div><div style="float:right; display:inlene;" id="cpu">[CPU] ${res.total_vacant_cpus}/${res.total_cpus}</div></div>`;
       } else {
         workerDiv.innerHTML = `<p class="card-header" id="${i}">Worker ${res.workers[i].hostname}</p>`;
       }
@@ -138,6 +138,9 @@ function addPlots(res, record, imgHandle, begin, end) {
       ]
     };
 
+    var cpuNum = document.getElementById('cpu');
+    cpu.innerText = `[CPU] ${res.total_vacant_cpus}/${res.total_cpus}`
+
     if (i < record_num && worker.hostname === record[i].hostname) {
       if (worker.used_cpus !== record[i].used_cpus) {
         imgHandle[`w${i}c0`].setOption(cpuOption);
@@ -147,8 +150,10 @@ function addPlots(res, record, imgHandle, begin, end) {
       }
       imgHandle[`w${i}c2`].setOption(loadOption);      
     } else {
-      var workerTitle = document.getElementById(`${i}`);
-      workerTitle.innerText = i===0 ? "Master" : `Worker ${worker.hostname}`;
+      if (i > 0){
+        var workerTitle = document.getElementById(`${i}`);
+        workerTitle.innerText = `Worker ${worker.hostname}`
+      }
       imgHandle[`w${i}c0`].setOption(cpuOption);
       imgHandle[`w${i}c1`].setOption(memoryOption);
       imgHandle[`w${i}c2`].setOption(loadOption);      
diff --git a/parl/remote/tests/actor_max_memory_test.py b/parl/remote/tests/actor_max_memory_test.py
index 8425b40aeaeb731d349372843774c0914e099315..ebe7f35d5c2c3a978bb8c257596797c96503ee35 100644
--- a/parl/remote/tests/actor_max_memory_test.py
+++ b/parl/remote/tests/actor_max_memory_test.py
@@ -26,7 +26,7 @@ from parl.remote.monitor import ClusterMonitor
 from multiprocessing import Process
 
 
-@parl.remote_class(max_memory=300)
+@parl.remote_class(max_memory=350)
 class Actor(object):
     def __init__(self, x=10):
         self.x = x
@@ -64,10 +64,18 @@ class TestMaxMemory(unittest.TestCase):
         time.sleep(20)
         self.assertEqual(1, cluster_monitor.data['clients'][0]['actor_num'])
         del actor
-        time.sleep(5)
+        time.sleep(10)
         p = Process(target=self.actor)
         p.start()
-        time.sleep(30)
+
+        for _ in range(6):
+            x = cluster_monitor.data['clients'][0]['actor_num']
+            if x == 0:
+                break
+            else:
+                time.sleep(10)
+        if x == 1:
+            raise ValueError("Actor max memory test failed.")
         self.assertEqual(0, cluster_monitor.data['clients'][0]['actor_num'])
         p.terminate()