diff --git a/2b2t-core/src/main/java/org.cn2b2t.core/managers/utils/database/Connection.java b/2b2t-core/src/main/java/org.cn2b2t.core/managers/utils/database/Connection.java
index 07ec2e9..ed614de 100644
--- a/2b2t-core/src/main/java/org.cn2b2t.core/managers/utils/database/Connection.java
+++ b/2b2t-core/src/main/java/org.cn2b2t.core/managers/utils/database/Connection.java
@@ -11,7 +11,7 @@ import java.util.logging.Level;
 
 public class Connection {
 
-	public boolean debug_outputSQL = true;
+	public boolean debug_outputSQL = false;
 	private Database sql;
 	private boolean databaseIsOpen;
 	private DatabaseConfig databaseConfig;