diff --git a/docs/source/basic_tutorials/launcher.md b/docs/source/basic_tutorials/launcher.md
index de7c995dc1..1e5b6fd230 100644
--- a/docs/source/basic_tutorials/launcher.md
+++ b/docs/source/basic_tutorials/launcher.md
@@ -162,7 +162,7 @@ Options:
           This setting is only applied if there is room in the batch as defined by `max_batch_total_tokens`.
           
           [env: WAITING_SERVED_RATIO=]
-          [default: 1.2]
+          [default: 0.3]
 
 ```
 ## MAX_BATCH_PREFILL_TOKENS
diff --git a/launcher/src/main.rs b/launcher/src/main.rs
index f264e0000d..28226fb426 100644
--- a/launcher/src/main.rs
+++ b/launcher/src/main.rs
@@ -251,7 +251,7 @@ struct Args {
     ///
     /// This setting is only applied if there is room in the batch
     /// as defined by `max_batch_total_tokens`.
-    #[clap(default_value = "1.2", long, env)]
+    #[clap(default_value = "0.3", long, env)]
     waiting_served_ratio: f32,
 
     /// Limits the number of tokens for the prefill operation.