diff --git a/FastGithub.Scanner/GithubScanService.cs b/FastGithub.Scanner/GithubScanService.cs
index 3b89603..437c397 100644
--- a/FastGithub.Scanner/GithubScanService.cs
+++ b/FastGithub.Scanner/GithubScanService.cs
@@ -27,7 +27,7 @@ namespace FastGithub.Scanner
             this.metaService = metaService;
             this.contextCollection = contextCollection;
             this.logger = logger;
-             ;
+            ;
             this.fullScanDelegate = new PipelineBuilder<GithubContext>(appService, ctx => Task.CompletedTask)
                 .Use<ConcurrentMiddleware>()
                 .Use<ScanOkLogMiddleware>()
@@ -46,29 +46,30 @@ namespace FastGithub.Scanner
 
         public async Task ScanAllAsync(CancellationToken cancellationToken = default)
         {
-            this.logger.LogInformation("完整扫描开始");
+            this.logger.LogInformation("完整扫描开始..");
             var meta = await this.metaService.GetMetaAsync(cancellationToken);
             if (meta != null)
             {
                 var scanTasks = meta.ToGithubContexts().Select(ctx => ScanAsync(ctx));
-                await Task.WhenAll(scanTasks);
+                var results = await Task.WhenAll(scanTasks);
+                var successCount = results.Count(item => item);
+                this.logger.LogInformation($"完整扫描结束，成功{successCount}条共{results.Length}条");
             }
 
-            this.logger.LogInformation("完整扫描结束");
-
-            async Task ScanAsync(GithubContext context)
+            async Task<bool> ScanAsync(GithubContext context)
             {
                 await this.fullScanDelegate(context);
                 if (context.Available == true)
                 {
                     this.contextCollection.Add(context);
                 }
+                return context.Available;
             }
         }
 
         public async Task ScanResultAsync()
         {
-            this.logger.LogInformation("结果扫描开始");
+            this.logger.LogInformation("结果扫描开始..");
 
             var contexts = this.contextCollection.ToArray();
             foreach (var context in contexts)
@@ -76,7 +77,7 @@ namespace FastGithub.Scanner
                 await this.resultScanDelegate(context);
             }
 
-            this.logger.LogInformation("结果扫描结束");
+            this.logger.LogInformation($"结果扫描结束，共扫描{contexts.Length}条记录");
         }
     }
 }
diff --git a/FastGithub.Scanner/Meta.cs b/FastGithub.Scanner/Meta.cs
index 94ceed1..10ee457 100644
--- a/FastGithub.Scanner/Meta.cs
+++ b/FastGithub.Scanner/Meta.cs
@@ -47,18 +47,7 @@ namespace FastGithub.Scanner
                         yield return new GithubContext("github.com", address);
                     }
                 }
-            }
-
-            foreach (var range in IPRange.From(this.Api).OrderBy(item => item.Size))
-            {
-                if (range.AddressFamily == AddressFamily.InterNetwork)
-                {
-                    foreach (var address in range)
-                    {
-                        yield return new GithubContext("api.github.com", address);
-                    }
-                }
-            }
+            } 
         }
     }
 }
diff --git a/FastGithub.Scanner/Middlewares/ConcurrentMiddleware.cs b/FastGithub.Scanner/Middlewares/ConcurrentMiddleware.cs
index 053fcb8..1271f51 100644
--- a/FastGithub.Scanner/Middlewares/ConcurrentMiddleware.cs
+++ b/FastGithub.Scanner/Middlewares/ConcurrentMiddleware.cs
@@ -12,8 +12,8 @@ namespace FastGithub.Scanner.Middlewares
 
         public ConcurrentMiddleware()
         {
-            var initialCount = Environment.ProcessorCount;
-            this.semaphoreSlim = new SemaphoreSlim(initialCount, initialCount * 4);
+            var currentCount = Environment.ProcessorCount * 4;
+            this.semaphoreSlim = new SemaphoreSlim(currentCount, currentCount);
         }
 
         public async Task InvokeAsync(GithubContext context, Func<Task> next)
diff --git a/FastGithub.Scanner/Middlewares/HttpsScanMiddleware.cs b/FastGithub.Scanner/Middlewares/HttpsScanMiddleware.cs
index 6ceb89a..2ed1a78 100644
--- a/FastGithub.Scanner/Middlewares/HttpsScanMiddleware.cs
+++ b/FastGithub.Scanner/Middlewares/HttpsScanMiddleware.cs
@@ -57,8 +57,18 @@ namespace FastGithub.Scanner.Middlewares
             }
             catch (Exception ex)
             {
-                this.logger.LogTrace($"{context.Domain} {context.Address} {ex.Message}");
+                var message = GetInnerMessage(ex);
+                this.logger.LogTrace($"{context.Domain} {context.Address} {message}");
             }
         }
+
+        private string GetInnerMessage(Exception ex)
+        {
+            while (ex.InnerException != null)
+            {
+                return GetInnerMessage(ex.InnerException);
+            }
+            return ex.Message;
+        }
     }
 }