通常如何为4G分配堆和Permgen内存? [英] how to allocate Heap and Permgen memory for 4G normally?

问题描述

我有4G内存(64位).当前，我在Eclipse IDE(JUNO)中使用默认内存设置.在JBoss 7.1上部署应用程序时，出现Out Of Memory错误.我想知道heap memory和permgen memory的memory ratio吗?假设，如果我将1G内存设置为堆内存，则permgen内存将为512M，仅此而已.如果是这样，permgen将占堆内存的50％.您能为他们提供分配内存的方法吗?

I have 4G memory(64-bit). Currently, I use default memory setting in Eclipse IDE(JUNO). when I deploy the application on JBoss 7.1 I get Out Of Memory error. I would like to know memory ratio of heap memory and permgen memory? Let say, if I set 1G memory for heap memory, permgen memory will be 512M, just example. If so, permgen will be 50% of heap memory. Could you provide the way for memory allocatation for them?

当前为eclipse.ini

Currently eclipse.ini

-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20120522-1813
-product
org.eclipse.epp.package.jee.product
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
512M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
512m
--launcher.defaultAction
openFile
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Dhelp.lucene.tokenizer=standard
-Xms128m
-Xmx1024m

原因:

    Caused by: java.lang.OutOfMemoryError: Java heap space

推荐答案

这取决于您看到的典型内存使用情况.当出现内存不足错误时，应该说出它是用于perm gen还是堆空间；进行相应的调整.

It depends on the typical memory usage you're seeing. When you get an out of memory error it should say if it's for perm gen or heap space; adjust accordingly.

如果说您的堆空间不足，则是您要增加的Xmx1024m.也许尝试Xmx2g.

If it's saying you're out of heap space then it's the Xmx1024m you want to increase. Perhaps try Xmx2g.

我还假设是Eclipse，您正在看到OutOfMemoryError吗?如果实际上是针对JBoss的，那么eclipse.ini将无济于事，因为当您部署到JBoss时，它将是另一台VM.在这种情况下，您需要增加$ JBOSS_HOME/bin/appclient.conf

I've also assumed it's Eclipse you're seeing the OutOfMemoryError for? If it's actually for JBoss then eclipse.ini won't help as when you deploy to JBoss it'll be a different VM. In that case you'd want to increase the Xmx value in $JBOSS_HOME/bin/appclient.conf

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