diff --git a/src/main/java/cn/mesalab/dao/DruidData.java b/src/main/java/cn/mesalab/dao/DruidData.java
index 62bec71..94bdf6d 100644
--- a/src/main/java/cn/mesalab/dao/DruidData.java
+++ b/src/main/java/cn/mesalab/dao/DruidData.java
@@ -130,8 +130,8 @@ public class DruidData {
                 + ", AVG("+ ApplicationConfig.BASELINE_METRIC_TYPE + ") as " + ApplicationConfig.BASELINE_METRIC_TYPE
                 + ", " + ApplicationConfig.DRUID_RECVTIME_COLUMN_NAME
                 + " FROM " + ApplicationConfig.DRUID_TABLE
-                + " WHERE " + ApplicationConfig.DRUID_ATTACKTYPE_COLUMN_NAME
-                + " IN " + attackList
+                + " WHERE " + ApplicationConfig.DRUID_ATTACKTYPE_COLUMN_NAME + " IN " + attackList
+                + " AND " + ApplicationConfig.BASELINE_METRIC_TYPE + " > 0"
                 + " AND " + timeFilter
                 + " AND " + partitionFilter
                 + " GROUP BY (" + ApplicationConfig.DRUID_SERVERIP_COLUMN_NAME
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index c0593d0..58ee25f 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -71,7 +71,7 @@ monitor.frequency.bin.num=100
 ################ 并发参数 #################
 ##########################################
 #druid.read.batch.time.grad.hour=4
-thread.pool.num=20
+thread.pool.num=10
 #druid分区字段partition_num的最大值为9999
 druid.partition.num.max=10000
 druid.connection.retry.time.max=10