diff --git a/core/src/main/java/com/taobao/arthas/core/server/ArthasBootstrap.java b/core/src/main/java/com/taobao/arthas/core/server/ArthasBootstrap.java
index a5ec0afa1..a5d2b453b 100644
--- a/core/src/main/java/com/taobao/arthas/core/server/ArthasBootstrap.java
+++ b/core/src/main/java/com/taobao/arthas/core/server/ArthasBootstrap.java
@@ -275,7 +275,7 @@ public class ArthasBootstrap {
             resolvers.add(builtinCommands);
 
             //worker group
-            workerGroup = new NioEventLoopGroup(24);
+            workerGroup = new NioEventLoopGroup(8);
 
             // TODO: discover user provided command resolver
             if (configure.getTelnetPort() > 0) {