diff --git a/service-scheduler/src/main/java/com/lanyuanxiaoyao/service/scheduler/quartz/distribute/cluster/B12Cluster.java b/service-scheduler/src/main/java/com/lanyuanxiaoyao/service/scheduler/quartz/distribute/cluster/B12Cluster.java
index 1af88ca..cfe7501 100644
--- a/service-scheduler/src/main/java/com/lanyuanxiaoyao/service/scheduler/quartz/distribute/cluster/B12Cluster.java
+++ b/service-scheduler/src/main/java/com/lanyuanxiaoyao/service/scheduler/quartz/distribute/cluster/B12Cluster.java
@@ -23,7 +23,7 @@ public class B12Cluster extends Cluster {
                 Constants.COMPACTION_QUEUE_B12,
                 AvailableStrategy.and(
                         new QueueSizeLimit(client, Constants.COMPACTION_QUEUE_B12, 20),
-                        new YarnQueueUsedLimit(yarnService, Constants.CLUSTER_B12, "default", 1.0)
+                        new YarnQueueUsedLimit(yarnService, Constants.CLUSTER_B12, "default", 0.8)
                 )
         );
     }