diff --git a/src/main/java/com/alibaba/druid/filter/stat/MergeSqlStatFilter.java b/src/main/java/com/alibaba/druid/filter/stat/MergeSqlStatFilter.java
deleted file mode 100644
index 0f344fb32a..0000000000
--- a/src/main/java/com/alibaba/druid/filter/stat/MergeSqlStatFilter.java
+++ /dev/null
@@ -1,40 +0,0 @@
-package com.alibaba.druid.filter.stat;
-
-import com.alibaba.druid.logging.Log;
-import com.alibaba.druid.logging.LogFactory;
-import com.alibaba.druid.proxy.jdbc.DataSourceProxy;
-import com.alibaba.druid.sql.visitor.ParameterizedOutputVisitorUtils;
-import com.alibaba.druid.stat.JdbcSqlStat;
-
-public class MergeSqlStatFilter extends StatFilter {
-
-    private final static Log LOG = LogFactory.getLog(MergeSqlStatFilter.class);
-
-    private String           dbType;
-
-    public String getDbType() {
-        return dbType;
-    }
-
-    public void setDbType(String dbType) {
-        this.dbType = dbType;
-    }
-
-    @Override
-    public void init(DataSourceProxy dataSource) {
-        super.init(dataSource);
-
-        if (this.dbType == null || this.dbType.trim().length() == 0) {
-            this.dbType = dataSource.getDbType();
-        }
-    }
-
-    public JdbcSqlStat getSqlStat(String sql) {
-        try {
-            sql = ParameterizedOutputVisitorUtils.parameterize(sql, sql);
-        } catch (Exception e) {
-            LOG.error("merge sql error", e);
-        }
-        return dataSourceStat.getSqlStat(sql);
-    }
-}
diff --git a/src/main/java/com/alibaba/druid/filter/stat/StatFilter.java b/src/main/java/com/alibaba/druid/filter/stat/StatFilter.java
index 00415264e6..177a0f907c 100644
--- a/src/main/java/com/alibaba/druid/filter/stat/StatFilter.java
+++ b/src/main/java/com/alibaba/druid/filter/stat/StatFilter.java
@@ -42,6 +42,7 @@ import com.alibaba.druid.proxy.jdbc.JdbcParameter;
 import com.alibaba.druid.proxy.jdbc.PreparedStatementProxy;
 import com.alibaba.druid.proxy.jdbc.ResultSetProxy;
 import com.alibaba.druid.proxy.jdbc.StatementProxy;
+import com.alibaba.druid.sql.visitor.ParameterizedOutputVisitorUtils;
 import com.alibaba.druid.stat.JdbcConnectionStat;
 import com.alibaba.druid.stat.JdbcDataSourceStat;
 import com.alibaba.druid.stat.JdbcResultSetStat;
@@ -77,9 +78,21 @@ public class StatFilter extends FilterEventAdapter implements StatFilterMBean {
     // 3 seconds is slow sql
     protected long                    slowSqlMillis              = 3 * 1000;
 
+    private String                    dbType;
+
+    private boolean                   mergeSql                   = false;
+
     public StatFilter(){
     }
 
+    public String getDbType() {
+        return dbType;
+    }
+
+    public void setDbType(String dbType) {
+        this.dbType = dbType;
+    }
+
     public boolean isConnectionStackTraceEnable() {
         return connectionStackTraceEnable;
     }
@@ -102,11 +115,67 @@ public class StatFilter extends FilterEventAdapter implements StatFilterMBean {
         return resetCount.get();
     }
 
+    public boolean isMergeSql() {
+        return mergeSql;
+    }
+
+    public void setMergeSql(boolean mergeSql) {
+        this.mergeSql = mergeSql;
+    }
+
+    public String mergeSql(String sql) {
+        if (!mergeSql) {
+            return sql;
+        }
+
+        try {
+            sql = ParameterizedOutputVisitorUtils.parameterize(sql, dbType);
+        } catch (Exception e) {
+            LOG.error("merge sql error", e);
+        }
+
+        return sql;
+    }
+
     @Override
     public synchronized void init(DataSourceProxy dataSource) {
         this.dataSource = dataSource;
 
         this.dataSourceStat = dataSource.getDataSourceStat();
+
+        if (this.dbType == null || this.dbType.trim().length() == 0) {
+            this.dbType = dataSource.getDbType();
+        }
+
+        initFromProperties(dataSource.getConnectProperties());
+        initFromProperties(System.getProperties());
+    }
+
+    private void initFromProperties(Properties properties) {
+        if (properties == null) {
+            return;
+        }
+
+        {
+            String property = properties.getProperty("druid.stat.mergeSql");
+            if ("true".equals(property)) {
+                this.mergeSql = true;
+            } else if ("false".equals(property)) {
+                this.mergeSql = false;
+            }
+        }
+
+        {
+            String property = properties.getProperty("druid.stat.slowSqlMillis");
+            if (property != null && property.trim().length() > 0) {
+                property = property.trim();
+                try {
+                    this.slowSqlMillis = Long.parseLong(property);
+                } catch (Exception e) {
+                    LOG.error("property 'druid.stat.slowSqlMillis' format error");
+                }
+            }
+        }
     }
 
     @Override
diff --git a/src/main/java/com/alibaba/druid/pool/ha/MultiDataSource.java b/src/main/java/com/alibaba/druid/pool/ha/MultiDataSource.java
index 4725b44cb0..dcccb6c6cf 100644
--- a/src/main/java/com/alibaba/druid/pool/ha/MultiDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/ha/MultiDataSource.java
@@ -86,6 +86,8 @@ public class MultiDataSource extends DataSourceAdapter implements MultiDataSourc
 
     private JdbcDataSourceStat                      dataSourceStat;
 
+    protected Properties                            connectionProperties      = new Properties();
+
     public long getMaxWaitMillis() {
         return maxWaitMillis;
     }
@@ -171,7 +173,7 @@ public class MultiDataSource extends DataSourceAdapter implements MultiDataSourc
             if (inited) {
                 return;
             }
-            
+
             dataSourceStat = new JdbcDataSourceStat(name, null);
 
             this.balancer.init(this);
@@ -501,4 +503,10 @@ public class MultiDataSource extends DataSourceAdapter implements MultiDataSourc
     public JdbcDataSourceStat getDataSourceStat() {
         return dataSourceStat;
     }
+
+    @Override
+    public Properties getConnectProperties() {
+        return connectionProperties;
+    }
+
 }
diff --git a/src/main/java/com/alibaba/druid/proxy/jdbc/DataSourceProxy.java b/src/main/java/com/alibaba/druid/proxy/jdbc/DataSourceProxy.java
index 5f4b09123c..960763c774 100644
--- a/src/main/java/com/alibaba/druid/proxy/jdbc/DataSourceProxy.java
+++ b/src/main/java/com/alibaba/druid/proxy/jdbc/DataSourceProxy.java
@@ -17,6 +17,7 @@ package com.alibaba.druid.proxy.jdbc;
 
 import java.sql.Driver;
 import java.util.List;
+import java.util.Properties;
 
 import com.alibaba.druid.filter.Filter;
 import com.alibaba.druid.stat.JdbcDataSourceStat;
@@ -25,6 +26,7 @@ import com.alibaba.druid.stat.JdbcDataSourceStat;
  * @author wenshao<szujobs@hotmail.com>
  */
 public interface DataSourceProxy {
+
     JdbcDataSourceStat getDataSourceStat();
 
     String getName();
@@ -46,4 +48,6 @@ public interface DataSourceProxy {
     long createResultSetId();
 
     long createTransactionId();
+
+    Properties getConnectProperties();
 }
diff --git a/src/main/java/com/alibaba/druid/proxy/jdbc/DataSourceProxyImpl.java b/src/main/java/com/alibaba/druid/proxy/jdbc/DataSourceProxyImpl.java
index c99479f947..4cb9bcc901 100644
--- a/src/main/java/com/alibaba/druid/proxy/jdbc/DataSourceProxyImpl.java
+++ b/src/main/java/com/alibaba/druid/proxy/jdbc/DataSourceProxyImpl.java
@@ -183,6 +183,10 @@ public class DataSourceProxyImpl implements DataSourceProxy, DataSourceProxyImpl
         return properties.toString();
     }
 
+    public Properties getConnectProperties() {
+        return properties;
+    }
+
     public CompositeDataSupport getCompositeData() throws JMException {
         StatFilter statFilter = null;
         JdbcDataSourceStat stat = null;