使用Eclipse内置的MAT插件分析dump文件时报错

下载下来一点dump文件很大，而后使用mat分析的时候mat自己报错

Out of Memory Error while Running the Memory Analyzer

这是由于eclipse配置的内存过小了致使的，网上查了下都是去改MemoryAnalyzer.ini的参数内容

但对于ecplise内置安装插件来讲是找不到这个文件的，

去官网查看https://wiki.eclipse.org/MemoryAnalyzer/FAQ

Out of Memory Error while Running the Memory Analyzer

Well, analyzing big heap dumps can also require more heap space. Give it some more memory (possible by running on a 64-bit machine):

MemoryAnalyzer.exe -vmargs -Xmx4g -XX:-UseGCOverheadLimit

Alternatively, edit the MemoryAnalyzer.ini to contain:

-vmargs

-Xmx2g

-XX:-UseGCOverheadLimit

As a rough guide, Memory Analyzer itself needs 32 to 64 bytes for each object in the analyzed heap, so -Xmx2g might allow a heap dump containing 30 to 60 million objects to be analyzed. Memory Analyzer 1.3 using -Xmx58g has successfully analyzed a heap dump containing over 948 million objects.

The initial parse and generation of the dominator tree uses the most memory, so it can be useful to do the initial parse on a large machine, then copy the heap dump and index files to a more convenient machine for further analysis.

For more details, check out the section Running Eclipse in the Help Center. It also contains more details if you are running on Mac OS X.

If you are running the Memory Analyzer inside your Eclipse SDK, you need to edit the eclipse.ini file.

也就是最后这句话，若是是eclipse内置安装的话就去改eclipse.ini的参数就能够了

 

另外附linux服务器生成dump文件命令：

jmap -dump:format=b,file=heapdump.phrof pid