二级缓存问题

老师好：请问开启了二级缓存后  commit提交时对该namespace缓存强制清空还会起作用吗？

为什么我这边演示commit打开/关闭后，缓存使用频率是一样的？

commit提交打开

[main] 15:37:42.399 DEBUG goods - Cache Hit Ratio [goods]: 0.3333333333333333

[main] 15:37:42.399 DEBUG goods - Cache Hit Ratio [goods]: 0.5

[main] 15:37:42.400 DEBUG goods - Cache Hit Ratio [goods]: 0.6

打印哈希值6750210:::6750210:::6750210

commit提交关闭

[main] 15:40:35.271 DEBUG goods - Cache Hit Ratio [goods]: 0.3333333333333333

[main] 15:40:35.271 DEBUG goods - Cache Hit Ratio [goods]: 0.5

[main] 15:40:35.271 DEBUG goods - Cache Hit Ratio [goods]: 0.6

打印哈希值6750210:::6750210:::6750210

@Test
public void testLV1Cache(){
    SqlSession sqlSession=null;
    try {
        sqlSession=MybatilsUtils.openSession();
        Goods goods=sqlSession.selectOne("goods.selectById",900);
        Goods goods1=sqlSession.selectOne("goods.selectById",900);
        //Goods goods3=sqlSession.selectOne("goods.selectById",900);
        //Goods goods4=sqlSession.selectOne("goods.selectById",900);
        System.out.println("打印哈希值"+goods.hashCode()+":::"+goods1.hashCode()); //":::"+goods3.hashCode()+":::"+goods4.hashCode());
    } catch (Exception e) {
        e.printStackTrace();
    }finally {
        MybatilsUtils.closeSession(sqlSession);
    }
    try {
        sqlSession=MybatilsUtils.openSession();
        Goods goods3=sqlSession.selectOne("goods.selectById",900);
       // sqlSession.commit();//commit提交时对该namespace缓存强制清空
        Goods goods4=sqlSession.selectOne("goods.selectById",900);
        //sqlSession.commit();
        Goods goods5=sqlSession.selectOne("goods.selectById",900);
        System.out.println("打印哈希值"+goods3.hashCode()+":::"+goods4.hashCode()+":::"+goods5.hashCode());
    } catch (Exception e) {
        e.printStackTrace();
    }finally {
        MybatilsUtils.closeSession(sqlSession);
    }

}