diff --git a/SkyEntities.cs b/SkyEntities.cs
index b954a77..9080e1d 100644
--- a/SkyEntities.cs
+++ b/SkyEntities.cs
@@ -11,7 +11,6 @@ using System;
 using ln.types.odb;
 using ln.skyscanner.entities;
 using System.IO;
-using LiteDB;
 using ln.http.resources;
 using System.Linq;
 
diff --git a/checks/CheckJob.cs b/checks/CheckJob.cs
index a0c62e3..819dbdd 100644
--- a/checks/CheckJob.cs
+++ b/checks/CheckJob.cs
@@ -14,6 +14,7 @@ using ln.logging;
 using Newtonsoft.Json;
 using ln.types.odb;
 using System.Linq;
+using System.Collections.Generic;
 namespace ln.skyscanner.checks
 {
     public class CheckJob : PoolJob
@@ -21,10 +22,19 @@ namespace ln.skyscanner.checks
         [JsonIgnore]
         public Node Node { get; }
 
+        Dictionary<string, SkyCheckState> checkStates = new Dictionary<string, SkyCheckState>();
+
         public CheckJob(Node node)
         {
             Name = String.Format("Interval check: {0} [{1}]",node.UniqueIdentity,node.PrimaryIP.ToString());
             Node = node;
+
+            Query stateQuery = Query.Equals<SkyCheckState>("UniqueNodeIdentifier", Node.UniqueIdentity);
+            SkyCheckState[] skyCheckStates = SkyScanner.Instance.Checker.checkStates.Select(stateQuery).ToArray();
+            foreach (SkyCheckState checkState in skyCheckStates)
+            {
+                checkStates.Add(checkState.CheckName, checkState);
+            }
         }
 
         public override void RunJob()
@@ -38,17 +48,18 @@ namespace ln.skyscanner.checks
 
                 if (checks[n].IsValid(Node))
                 {
-                    Query stateQuery = Query.AND(
-                        Query.Equals<SkyCheckState>("CheckName",checks[n].Name),
-                        Query.Equals<SkyCheckState>("UniqueNodeIdentifier", Node.UniqueIdentity)
-                    );
-                    SkyCheckState checkState = SkyScanner.Instance.Checker.CheckStates.Select(stateQuery).FirstOrDefault();
-
                     try
                     {
+                        SkyCheckState checkState = checkStates.ContainsKey(checks[n].Name) ? checkStates[checks[n].Name] : null;
+
+                        if (checkState != null)
+                        {
+                            checkState.LastCheckTime = DateTime.Now;
+                        }
+
                         checks[n].Check(SkyScanner.Instance.Checker, ref checkState, Node);
                         if (checkState != null)
-                            SkyScanner.Instance.Checker.CheckStates.Upsert(checkState);
+                            SkyScanner.Instance.Checker.Save(checkState);
 
                     } catch (Exception e)
                     {
diff --git a/checks/Hostalive.cs b/checks/Hostalive.cs
index 25ac580..08add17 100644
--- a/checks/Hostalive.cs
+++ b/checks/Hostalive.cs
@@ -31,6 +31,13 @@ namespace ln.skyscanner.checks
 
         public override void Check(SkyChecker skyChecker,ref SkyCheckState checkState,Node node)
         {
+            if (checkState == null)
+            {
+                checkState = new SkyCheckState(this, node);
+                checkState.WarnLower = 0.6;
+                checkState.CritLower = 0.3;
+            }
+
             long roundTripTime = 0;
             int success = 0;
             int n;
@@ -53,6 +60,7 @@ namespace ln.skyscanner.checks
                 roundTripTime /= success;
                 skyChecker.WritePerfValue(this, "rta", node, roundTripTime);
             }
+            SetState(checkState, fSuccess);
         }
     }
 }
diff --git a/checks/SkyCheck.cs b/checks/SkyCheck.cs
index ee42d79..9fee775 100644
--- a/checks/SkyCheck.cs
+++ b/checks/SkyCheck.cs
@@ -34,6 +34,20 @@ namespace ln.skyscanner.checks
         public abstract bool IsValid(Node node);
         public abstract void Check(SkyChecker skyChecker,ref SkyCheckState checkState,Node node);
 
+        public virtual void SetState(SkyCheckState checkState,double value)
+        {
+            if ((value < checkState.CritLower) || (value > checkState.CritUpper))
+            {
+                checkState.CheckState = CheckState.CRITICAL;
+            } else if ((value < checkState.WarnLower) || (value > checkState.WarnUpper))
+            {
+                checkState.CheckState = CheckState.WARN;
+            }
+            else
+            {
+                checkState.CheckState = CheckState.OK;
+            }
+        }
 
         static SkyCheck()
         {
diff --git a/checks/SkyCheckState.cs b/checks/SkyCheckState.cs
index 2728595..3b2f9e8 100644
--- a/checks/SkyCheckState.cs
+++ b/checks/SkyCheckState.cs
@@ -9,12 +9,19 @@
 //  **/
 using System;
 using ln.skyscanner.entities;
+using ln.types.odb;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 namespace ln.skyscanner.checks
 {
+    [JsonConverter(typeof(StringEnumConverter))]
     public enum CheckState { OK, WARN, CRITICAL, FAIL, ERROR }
 
     public class SkyCheckState
     {
+        [DocumentID]
+        public Guid ID = Guid.NewGuid();
+
         public readonly String CheckName;
         public readonly String UniqueNodeIdentifier;
 
@@ -25,6 +32,8 @@ namespace ln.skyscanner.checks
         public double CritLower { get; set; } = Double.MinValue;
         public double CritUpper { get; set; } = Double.MaxValue;
 
+        public CheckState CheckState { get; set; }
+
         protected SkyCheckState()
         {
         }
diff --git a/checks/SkyChecker.cs b/checks/SkyChecker.cs
index 1eeff1c..fb43e8a 100644
--- a/checks/SkyChecker.cs
+++ b/checks/SkyChecker.cs
@@ -19,6 +19,7 @@ using ln.logging;
 using ln.snmp;
 using ln.http.resources;
 using ln.types.odb;
+using System.Collections.Generic;
 namespace ln.skyscanner.checks
 {
     public class SkyChecker
@@ -29,6 +30,9 @@ namespace ln.skyscanner.checks
         public PoolJob[] CurrentJobs => checkPool.CurrentPoolJobs;
         [Callable]
         public PoolJob[] QueuedJobs => checkPool.QueuedJobs;
+        [Callable]
+        public SkyCheckState[] CheckStates => checkStates.ToArray();
+
 
         [Callable]
         public string[] PerfNames => perfFiles.Keys.ToArray();
@@ -44,7 +48,9 @@ namespace ln.skyscanner.checks
         bool stopping;
 
         ODB odb;
-        public ODBCollection<SkyCheckState> CheckStates { get; private set; }
+        public ODBCollection<SkyCheckState> checkStates { get; private set; }
+
+        List<SkyCheckState> saveQueue = new List<SkyCheckState>();           
 
         public SkyChecker()
         {
@@ -54,9 +60,9 @@ namespace ln.skyscanner.checks
             SNMPEngine.Timeout = 4000;
 
             odb = new ODB(Path.Combine(BasePath));
-            CheckStates = odb.GetCollection<SkyCheckState>();
-            CheckStates.EnsureIndex("CheckName");
-            CheckStates.EnsureIndex("UniqueNodeIdentifier");
+            checkStates = odb.GetCollection<SkyCheckState>();
+            checkStates.EnsureIndex("CheckName");
+            checkStates.EnsureIndex("UniqueNodeIdentifier");
         }
 
         public void Start()
@@ -64,7 +70,9 @@ namespace ln.skyscanner.checks
             if ((threadScheduler != null) && (threadScheduler.IsAlive))
                 throw new NotSupportedException("SkyChecker.scheduler() already running");
 
-            checkPool.SetPoolSize(128);
+            checkPool.SetPoolSize(256);
+
+            Thread.Sleep(2500);
 
             threadScheduler = new Thread(scheduler);
             threadScheduler.Start();
@@ -154,14 +162,28 @@ namespace ln.skyscanner.checks
             {
                 while (!stopping)
                 {
-                    int n = 0;
+                    List<CheckJob> checkJobs = new List<CheckJob>();
+
+                    Logging.Log(LogLevel.INFO, "SkyChecker.scheduler(): scheduler save CheckStates");
+
+                    lock (saveQueue)
+                    {
+                        foreach (SkyCheckState checkState in saveQueue)
+                        {
+                            SkyScanner.Instance.Checker.checkStates.Upsert(checkState);
+                        }
+                        saveQueue.Clear();
+                    }
+
+                    Logging.Log(LogLevel.INFO, "SkyChecker.scheduler(): scheduler starts");
+
                     foreach (Node node in SkyScanner.Instance.Entities.GlobalNetwork.Nodes)
                     {
                         CheckJob checkJob = new CheckJob(node);
-                        if (checkPool.Enqueue(checkJob))
-                            n++;
+                        checkJobs.Add(checkJob);
                     }
-                    Logging.Log(LogLevel.INFO, "SkyChecker.scheduler(): scheduled {0} checks", n);
+                    Logging.Log(LogLevel.INFO, "SkyChecker.scheduler(): prepared {0} checks", checkJobs.Count);
+                    Logging.Log(LogLevel.INFO, "SkyChecker.scheduler(): scheduled {0} checks", checkPool.Enqueue(checkJobs));
 
                     while ((nextMinute - DateTimeOffset.Now.ToUnixTimeMilliseconds()) < 0)
                         nextMinute += 60000;
@@ -176,6 +198,14 @@ namespace ln.skyscanner.checks
 
         }
 
+        public void Save(SkyCheckState checkState)
+        {
+            lock (saveQueue)
+            {
+                saveQueue.Add(checkState);
+            }
+        }
+
 
         public ComponentState State
         {
diff --git a/checks/Ubiquity.cs b/checks/Ubiquity.cs
index d68c8cb..c994f6a 100644
--- a/checks/Ubiquity.cs
+++ b/checks/Ubiquity.cs
@@ -56,6 +56,7 @@ namespace ln.skyscanner.checks
 
                 }
             }
+            checkState.CheckState = CheckState.OK;
         }
 
         public override bool IsValid(Node node)
diff --git a/crawl/CrawledHost.cs b/crawl/CrawledHost.cs
index aed96d2..a127147 100644
--- a/crawl/CrawledHost.cs
+++ b/crawl/CrawledHost.cs
@@ -13,7 +13,6 @@ using ln.types;
 using System.Net;
 using System.Linq;
 using ln.snmp.rfc1213;
-using LiteDB;
 using ln.types.odb;
 using ln.types.net;
 
diff --git a/entities/GlobalNetwork.cs b/entities/GlobalNetwork.cs
index f1d4b9a..1f83a94 100644
--- a/entities/GlobalNetwork.cs
+++ b/entities/GlobalNetwork.cs
@@ -26,7 +26,7 @@ namespace ln.skyscanner.entities
         public SkyEntities SkyEntities { get; private set; }
 
         public IEnumerable<Subnet> Subnets => SkyEntities.subnetCollection;
-        public IEnumerable<Node> Nodes => SkyEntities.nodeCollection;
+        public IEnumerable<Node> Nodes => SkyEntities.nodeCollection.ToArray();
 
         public HopMap DefaultHopMap { get; private set; } = new HopMap();
 
diff --git a/entities/HopMap.cs b/entities/HopMap.cs
index 28a43eb..0bfcfb6 100644
--- a/entities/HopMap.cs
+++ b/entities/HopMap.cs
@@ -9,15 +9,11 @@
 //  **/
 using System;
 using System.Collections.Generic;
-using System.Collections;
-using Castle.Core.Logging;
 using ln.types.odb;
 using System.Linq;
 using ln.types.btree;
-using Castle.Components.DictionaryAdapter.Xml;
 using Newtonsoft.Json;
 using ln.types.net;
-using System.Net.Sockets;
 namespace ln.skyscanner.entities
 {
     public class HopMap : Persistent
diff --git a/entities/NetworkInterface.cs b/entities/NetworkInterface.cs
index 6fd7407..6eacda3 100644
--- a/entities/NetworkInterface.cs
+++ b/entities/NetworkInterface.cs
@@ -13,7 +13,6 @@ using ln.types;
 using ln.skyscanner.crawl;
 using ln.types.odb;
 using Newtonsoft.Json;
-using LiteDB;
 using ln.logging;
 using ln.types.net;
 namespace ln.skyscanner.entities
diff --git a/entities/Node.cs b/entities/Node.cs
index d1240d3..9dd9032 100644
--- a/entities/Node.cs
+++ b/entities/Node.cs
@@ -13,7 +13,6 @@ using System.Collections.Generic;
 using System.Linq;
 using ln.types.odb;
 using Newtonsoft.Json;
-using LiteDB;
 using ln.types.threads;
 using ln.types.net;
 namespace ln.skyscanner.entities
diff --git a/ln.skyscanner.csproj b/ln.skyscanner.csproj
index 7b6cb00..56ea8cb 100644
--- a/ln.skyscanner.csproj
+++ b/ln.skyscanner.csproj
@@ -36,13 +36,7 @@
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.12.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
-    <Reference Include="Castle.Core">
-      <HintPath>..\packages\Castle.Core.4.3.1\lib\net45\Castle.Core.dll</HintPath>
-    </Reference>
     <Reference Include="System.Configuration" />
-    <Reference Include="LiteDB">
-      <HintPath>..\packages\LiteDB.4.1.4\lib\net40\LiteDB.dll</HintPath>
-    </Reference>
     <Reference Include="System.Net.Http" />
   </ItemGroup>
   <ItemGroup>
@@ -166,6 +160,9 @@
     <None Include="templates\static\checks\status.html">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Include="templates\static\checks\checkstates.html">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <Folder Include="identify\" />
diff --git a/packages.config b/packages.config
index b1b0b2b..78afeed 100644
--- a/packages.config
+++ b/packages.config
@@ -1,7 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Castle.Core" version="4.3.1" targetFramework="net47" />
-  <package id="LiteDB" version="4.1.4" targetFramework="net47" />
   <package id="Newtonsoft.Json" version="12.0.1" targetFramework="net47" />
   <package id="SSH.NET" version="2016.1.0" targetFramework="net47" />
 </packages>
\ No newline at end of file
diff --git a/templates/static/checks/checkstates.html b/templates/static/checks/checkstates.html
new file mode 100644
index 0000000..d4f8307
--- /dev/null
+++ b/templates/static/checks/checkstates.html
@@ -0,0 +1,42 @@
+<%frame "frame.html"%>
+
+<h1>Check Stati</h1>
+<br/>
+
+<div class="flex column">
+    <div>
+        <div style="width: 100%;">
+            <table id="CheckStates"></table>
+        </div>
+    </div>
+</div>
+
+<script type="text/javascript">
+    
+    var pbar = $().dataTable.render.percentBar('round','#fff', '#FF9CAB', '#FF0033', '#FF9CAB', 0, 'solid');
+    var dtDef = {
+                columns: [
+                        { title: "CheckName", data: "CheckName" },
+                        { title: "UniqueNodeIdentifier", data: "UniqueNodeIdentifier" },
+                        { title: "LastCheckTime", data: "LastCheckTime" },
+                        { title: "CheckState", data: "CheckState" },
+                    ],
+                };
+    
+    $("#CheckStates").DataTable( dtDef );
+    
+    function refresh()
+    {
+        skyapi().getJson("checker/CheckStates", function(data){
+                if (!data)
+                    data = []
+    
+                $("#CheckStates").DataTable().clear();
+                $("#CheckStates").DataTable().rows.add( data ).draw();
+            });
+    }
+    
+    refresh();
+    skyapi().addRefresh( refresh, 15 );
+    
+</script>
diff --git a/templates/static/checks/index.html b/templates/static/checks/index.html
index 7b6823a..aad08f2 100644
--- a/templates/static/checks/index.html
+++ b/templates/static/checks/index.html
@@ -21,6 +21,7 @@
 
 <script type="text/javascript">
     moment.defaultFormat = "DD.MM.YYYY HH:mm";
+    //Chart.defaults.global.defaultColor = 'rgba(0.1,0.1,1.0,1.0)';
     
     var chartCTX = $("#perfChart");
     var chart = new Chart( chartCTX, {
@@ -29,7 +30,8 @@
                 datasets: [
                     {
                         label: "-",
-                        data: []
+                        data: [],
+                        backgroundColor: '#04E000',
                     }
                 ]
             },
@@ -38,7 +40,8 @@
                     yAxes: [
                         {
                             ticks: {
-                                callback: ScaleSI
+                                callback: ScaleSI,
+                                beginAtZero: true,
                             }
                         }
                     ],
diff --git a/templates/static/nav.html b/templates/static/nav.html
index 805217d..7f88eb6 100644
--- a/templates/static/nav.html
+++ b/templates/static/nav.html
@@ -35,7 +35,7 @@
             <a href="/static/checks/index.html" onclick="skyapi().loadPage('static/checks/index.html'); return false;"><div>Checks</div></a>
         </div>
         <div>
-            <a href="#" onclick="skyapi().loadPage('static/checker.html'); return false;"><div>Hosts</div></a>
+            <a href="/static/checks/checkstates.html" onclick="skyapi().loadPage('static/checks/checkstates.html'); return false;"><div>Check States</div></a>
         </div>
     </div>