jvm(1）-- 初体验：eclipse Memory analyer

偏执的太偏执、 2023-06-24 12:25 4阅读 0赞

### 文章目录 ###

*  eclipse Memory analyer网盘地址
 *  一段代码
 *  如何使用eclipse memory analyer

# eclipse Memory analyer网盘地址 #

链接: https://pan.baidu.com/s/1AqWFU4JPWtwQ5F1TBw9omw 提取码: 27ei

# 一段代码 #

![在这里插入图片描述][2019122312561457.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70]  
jvm参数，生成一个堆快照，设置初始内存和最大内存为20M

> `-XX:+HeapDumpOnOutOfMemoryError -Xmx20m -Xms20m`

运行结果:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70 1]

# 如何使用eclipse memory analyer #

上面的代码在项目下生成了一个文件，

![在这里插入图片描述][2019122313005914.png]

*  1.打开eclipse memory anayler  
    ![在这里插入图片描述][20191223130326836.png]
 *  2.点击菜单栏file—open heap dump
 *  3.点击finish  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70 2]  
    出现下面的面板  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70 3]  
    \-4，点击dominator\_tree  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70 4]  
    显示该列表  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70 5]  
    点击:  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70 6]  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70 7]  
    可以发现占用内存大的问题，在于产生了很多的demo对象，  
    对应代码的话，也就是在这行：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzIxMzQ5NjM1_size_16_color_FFFFFF_t_70 8]

--------------------

完

[2019122312561457.png]: https://img-blog.csdnimg.cn/2019122312561457.png
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[2019122313005914.png]: https://img-blog.csdnimg.cn/2019122313005914.png
[20191223130326836.png]: https://img-blog.csdnimg.cn/20191223130326836.png
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