DB2 JDBC本机驱动程序存在延迟关闭问题

I am using java 1.5 on AS400 with DB2 database. I am using the native JDBC driver (com.ibm.db2.jdbc.app.DB2Driver) to perform the connection to the database. I want to turn "lazy close" property on to improve performance, but when I do so I get a warning, and can't see that this property was affected at all. My connection string is: jdbc:db2:B10D8A81/B3V0530DB2;lazy close=true; This connection string is working fine accept the lazy close is not turned on. The lazy close property was taken form:I am using java 1.5 on AS400 with DB2 database.