diff --git a/datax-admin/src/main/java/com/wugui/datax/admin/tool/query/BaseQueryTool.java b/datax-admin/src/main/java/com/wugui/datax/admin/tool/query/BaseQueryTool.java
index ef59b26e..0262029b 100644
--- a/datax-admin/src/main/java/com/wugui/datax/admin/tool/query/BaseQueryTool.java
+++ b/datax-admin/src/main/java/com/wugui/datax/admin/tool/query/BaseQueryTool.java
@@ -70,6 +70,7 @@ public abstract class BaseQueryTool implements QueryToolInterface {
         dataSource.setPassword(jobJdbcDatasource.getJdbcPassword());
         dataSource.setJdbcUrl(jobJdbcDatasource.getJdbcUrl());
         dataSource.setDriverClassName(jobJdbcDatasource.getJdbcDriverClass());
+        dataSource.setMaximumPoolSize(20);
         //设为只读
         dataSource.setReadOnly(true);
         this.jobJdbcDatasource = jobJdbcDatasource;
diff --git a/datax-admin/src/main/java/com/wugui/datax/admin/util/Constant.java b/datax-admin/src/main/java/com/wugui/datax/admin/util/Constant.java
index f887b880..8a8778a4 100644
--- a/datax-admin/src/main/java/com/wugui/datax/admin/util/Constant.java
+++ b/datax-admin/src/main/java/com/wugui/datax/admin/util/Constant.java
@@ -1,9 +1,6 @@
 package com.wugui.datax.admin.util;
 
 public final class Constant {
-    static final int TIMEOUT_SECONDS = 15;
-    static final int MAX_TRY_TIMES = 4;
-    static final int SOCKET_TIMEOUT_INSECOND = 172800;
 
     public static final String MYSQL_DATABASE = "Unknown database";
     public static final String MYSQL_CONNEXP = "Communications link failure";