JVM 调优实战--内存溢出的定位和MAT分析

ゞ浴缸里的玫瑰 2023-10-07 08:14 46阅读 0赞

**目录**

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内存溢出的定位和分析

模拟内存溢出代码

MAT分析

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## 内存溢出的定位和分析 ##

![2020011521182274.png][]

### 模拟内存溢出代码 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70][]

> 添加运行参数：
> 
> ![20200115212311443.png][]
> 
> ①-Xms8m：初始堆内存大小为8M；
> 
> ②-Xmx8m：最大堆内存大小为8M；
> 
> ③HeapDumpOnOutOfMemoryError：当发生堆内存溢出时dump到文件。

> 在idea中添加参数，并运行程序：

![2020011521261159.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 1][]

> dump文件也已经生成：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 2][]

### MAT分析 ###

> 将文件导入MAT工具进行分析：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 3][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 4][]

[2020011521182274.png]: https://img-blog.csdnimg.cn/2020011521182274.png
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[20200115212311443.png]: https://img-blog.csdnimg.cn/20200115212311443.png
[2020011521261159.png]: https://img-blog.csdnimg.cn/2020011521261159.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200115212858993.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200115212827215.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ=,size_16,color_FFFFFF,t_70
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