blocks|key|3353511|text|-xms是启动内存(在虚拟机启动时)，-xmx是虚拟机的最大内存|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353512|3353513|eclipse.ini+:运行eclipse|unordered-list-item|3353514|jre设置的VM的内存:从eclipse运行的java程序的内存:+tomcat服务器|3353515|的内存。|3353516|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|M|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

-xms is the start memory (at the VM start), -xmx is the maximum memory for the VM

<ul>
<li>eclipse.ini : the memory for the VM running eclipse</li>
<li>jre setting : the memory for java programs run from eclipse</li>
<li>catalina.sh : the memory for your tomcat server</li>
</ul>

blocks|key|359052|text|有几种不同的内存设置是有充分理由的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|359053|eclipse内存设置是因为Eclipse是一个大型java程序。如果你打算在几个项目中打开大量的文件，那么你会想给Eclipse更多的ram。这只是一个“企业”系统的问题，通常个人项目不会使用那么多的文件句柄或接口。|359054|JRE设置是在您运行项目时允许java运行时使用多少ram。当你运行一些占用内存的应用程序时，这可能是你想要的。我曾经运行过一些数学项目，这些项目需要一些内存，并且必须真的告诉JRE它是可以的，JVM一直假设我的程序处于某种泄漏的失控状态，但我是故意这样做的，并且必须明确地告诉JVM它允许使用什么。|359055|那么Catalina的内存设置是针对应用服务器Tomcat的。该服务器需要为每个应用程序和并发用户提供内存。这与JRE编号混合在一起，因为您的项目可能是一个web应用程序，而我不确定哪一个需要内存。|359056|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

There's a couple of different memory settings for good reason.

The eclipse memory setting is because Eclipse is a large java program. if you are going to have a huge amount of files open in a couple of projects, then you're going to want to give Eclipse more ram. This is an issue only on "enterprise" systems normally personal projects wont use that many file handles or interfaces.

The JRE setting is how much ram to allow the java runtime when you run your project. This is probably the one you want when you are running some memory hogging application. I've run mathematical projects that needed a few gigs of ram and had to really tell the JRE it was okay, the JVM kept assuming my program was in some leaky runaway state, but I was doing it on purpose, and had to tell JVM specifically what it was allowed to use.

Then Catalina's memory setting is for the application server Tomcat. That server needs memory for each application and concurrent users. This blends with the JRE number because your project might be a web application and I'm not sure which one needs the memory.

blocks|key|3140744|text|首先，我建议您将问题缩小到组件抛出“内存不足异常”的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3140745|这可能是：|3140746|3140747|Eclipse本身(我在Tomcat|ordered-list-item|offset|length|style|BOLD|3140748|下使用doubt)|3140749|Your应用程序|unordered-list-item|3140750|3140751|JVM参数-xms和-xmx表示堆的“起始内存”和“最大内存”。忘记“开始记忆”吧。这现在对你没有帮助，只有当你确定你的应用程序会迅速消耗这么多内存时，你才应该改变这个参数。|CODE|3140752|在生产环境中，我认为您唯一可以更改的参数是Catalina.sh或Catalina.bat文件下的-xmx。但是，如果您直接从Eclipse使用Tomcat配置调试环境来测试您的webapp，您只需转到"Debug+Configurations“>+"Apache+Tomcat”>+"Arguments“>+"VM+arguments”并在那里设置-xmx即可。|3140753|至于2+2gb的最佳-xmx，这在很大程度上取决于你的环境和你的应用程序可能接受的请求数量。我会尝试从500mb到1+1gb的值。检查您的操作系统虚拟内存“区域”限制和JVM本身的限制。|3140754|entityMap^0|0|0|0|0|7|C|6|0|0|0|8|0|0|5|4|A|4|0|1D|4|4V|4|0|A|4|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|13|8|@$H|14|I|15|J|K]|$H|16|I|17|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|18|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|19|8|@$H|1A|I|1B|J|K]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1D|8|@$H|1E|I|1F|J|T]|$H|1G|I|1H|J|T]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1I|8|@$H|1J|I|1K|J|T]|$H|1L|I|1M|J|T]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1N|8|@$H|1O|I|1P|J|T]]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]]|Z|$]]

First of all, I suggest that you narrow the problem to which component throws the "Out of Memory Exception".

This could be:

<ol>
<li>Eclipse itself (which I doubt)</li>
<li>Your application under Tomcat</li>
</ol>

The JVM parameters <code>-xms</code> and <code>-xmx</code> represent the heap's "start memory" and the "maximum memory". Forget the "start memory". This is not going to help you now and you should only change this parameter if you're sure your app will consume this amount of memory rapidly.

In production, I think the only parameter that you can change is the <code>-xmx</code> under the Catalina.sh or Catalina.bat files. But if you are testing your webapp directly from Eclipse with a configured debug environment of Tomcat, you can simply go to your "Debug Configurations" > "Apache Tomcat" > "Arguments" > "VM arguments" and set the <code>-xmx</code> there.

As for the optimal <code>-xmx</code> for 2gb, this depends a lot of your environment and the number of requests your app might take. I would try values from 500mb up to 1gb. Check your OS virtual memory "zone" limit and the limit of the JVM itself.

blocks|key|3140767|text|如果你看到内存不足，考虑一下这是否可能:你真的需要那么多内存吗？如果不是这样的话(例如，当你没有很大的对象，并且由于某种原因你不需要创建数百万个对象时)，很有可能你有一个内存泄漏。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3140768|在Java中，这意味着您保留了对某个对象的引用，即使您不再需要它。常见的原因是忘记在资源(文件、数据库连接、语句和结果集等)上调用close()。|3140769|如果怀疑是内存泄漏，请使用探查器找出哪个对象占用了所有可用内存。|3140770|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

If you see an out of memory, consider if that is plausible: Do you really need that much memory? If not (i.e. when you don't have huge objects and if you don't need to create millions of objects for some reason), chances are that you have a memory leak.

In Java, this means that you're keeping a reference to an object somewhere even though you don't need it anymore. Common causes for this is forgetting to call close() on resources (files, DB connections, statements and result sets, etc.).

If you suspect a memory leak, use a profiler to find which object occupies all the available memory.

blocks|key|3140813|text|在Eclipse中也有一些内存问题，但对于我们来说，它的方式不是在实际运行时，而是在Eclipse进行刷新(手动或自动)时，或者如果试图构建它，eclipse会崩溃并关机。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3140814|在日志中有一些信息：|3140815|Heap
+def+new+generation+++total+36352K,+used+11534K+[0x10040000,+0x127b0000,+0x14f00000)
++eden+space+32320K,++29%25+used+[0x10040000,+0x10994c30,+0x11fd0000)
++from+space+4032K,++49%25+used+[0x123c0000,+0x125aed80,+0x127b0000)
++to+++space+4032K,+++0%25+used+[0x11fd0000,+0x11fd0000,+0x123c0000)
+tenured+generation+++total+483968K,+used+125994K+[0x14f00000,+0x327a0000,+0x50040000)
+++the+space+483968K,++26%25+used+[0x14f00000,+0x1ca0ab38,+0x1ca0ac00,+0x327a0000)
+compacting+perm+gen++total+58112K,+used+57928K+[0x50040000,+0x53900000,+0x60040000)
+++the+space+58112K,++99%25+used+[0x50040000,+0x538d2160,+0x538d2200,+0x53900000)
No+shared+spaces+configured.|code-block|syntax|javascript|3140816|即使我将eclipse.ini调整为使用这些值，它似乎也不会被应用。|3140817|-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
1024M
-framework
plugins\org.eclipse.osgi_3.4.2.R34x_v20080826-1230.jar
-vmargs
-Dosgi.requiredJavaVersion=1.5
-XX:MaxPermSize=256m
-Xms512m
-Xmx1024m|3140818|有没有见过这个问题的？|3140819|我会补充说，使用的项目非常大。|3140820|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Also have some problems with the memory in Eclipse, but the way it is for us, is not when the actual run, it is when Eclipse is doing a refresh (manually or auto), or if trying to build it, eclipse crash and are shutdown.

In the logs there are some info:

<pre><code>Heap
 def new generation total 36352K, used 11534K [0x10040000, 0x127b0000, 0x14f00000)
 eden space 32320K, 29% used [0x10040000, 0x10994c30, 0x11fd0000)
 from space 4032K, 49% used [0x123c0000, 0x125aed80, 0x127b0000)
 to space 4032K, 0% used [0x11fd0000, 0x11fd0000, 0x123c0000)
 tenured generation total 483968K, used 125994K [0x14f00000, 0x327a0000, 0x50040000)
 the space 483968K, 26% used [0x14f00000, 0x1ca0ab38, 0x1ca0ac00, 0x327a0000)
 compacting perm gen total 58112K, used 57928K [0x50040000, 0x53900000, 0x60040000)
 the space 58112K, 99% used [0x50040000, 0x538d2160, 0x538d2200, 0x53900000)
No shared spaces configured.
</code></pre>

Even if I adjust the eclipse.ini to use these values it doesn't seems to be applied.

<pre><code>-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
1024M
-framework
plugins\org.eclipse.osgi_3.4.2.R34x_v20080826-1230.jar
-vmargs
-Dosgi.requiredJavaVersion=1.5
-XX:MaxPermSize=256m
-Xms512m
-Xmx1024m
</code></pre>

Any that have seen this issue before? 
Will add that the project that are used is very large.

blocks|key|355816|text|在我们的案例中发现了两个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|355817|355818|内存正在停止，我们必须将启动perm大小设置为更高的值。我猜它使用内存的速度比分配内存的速度要快。在我们的情况下。Eclipse+-XX:MaxPermSize=256m|ordered-list-item|355819|We使用Clearcase，来自Rational+Clearcase+SCM+(7.0.0.2)的插件在-XX:PermSize=256m中使用。这个插件就是Eclipse崩溃的原因。目前我们还不知道为什么，但对于其他人来说知道这一点是很好的。被迫将其禁用。|355820|355821|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|L|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|M|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|N|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|J|$]]

Found 2 issues in our case.

<ol>
<li>The Memory was halting and we where mandatory to set the startup perm size to higher value.
I guess it was using memory faster then able to allocate it.
In our case. 
-XX:PermSize=256m
-XX:MaxPermSize=256m</li>
<li>We are using Clearcase and the plugin from Rational Clearcase SCM (7.0.0.2) was used in Eclipse.
The plugin was the case of why Eclipse crashed. And at the moment we do not know why, but could be good to know for others. Was forced to disable it.</li>
</ol>

blocks|key|3353759|text|我们在尝试构建一个非常大的Flex项目时遇到了一个堆空间问题，这个问题不能通过增加分配给Ant的内存或添加fork=true参数来解决。它最终成为了Flex+3.4.0+sdk中的一个bug。在对开发人员进行sdk版本调查并恢复到3.3.0版本后，我终于弄明白了这一点。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3353760|对于好奇的人来说。|3353761|我追踪到了一个接口文件，该文件添加了一个额外的访问器对"get/set+maskTrackSkin“。如果向接口添加了任何额外的函数，就会发生堆空间错误，更糟糕的是，接口不在得到堆空间错误的项目中。希望这对某些人有帮助。|3353762|entityMap^0|1V|1W|0|0|9|0|0|32|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|K|$]]

We hit a heap space issue with Ant while trying to build a very large Flex project which could not be solved by increasing the memory allocated to Ant or by adding the fork=true param. It ended up being a bug in Flex 3.4.0 sdk. I finally figured this out after polling the devs for their sdk version and reverting to 3.3.0. 

For the curious. 

I tracked the bug down to an Interface file that had an additional accessor pair added "get/set maskTrackSkin". The heap space error hit if any additional functions were added to the interface and to make things worse the interface was not in the project that was getting the heap space error. Hope this helps someone.

blocks|key|354479|text|Eclipse中的Tomcat不使用catalina.sh或bat。要为托管Tomcat设置内存，请使用服务器运行配置中的VM设置|type|unstyled|depth|inlineStyleRanges|entityRanges|data|354480|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Tomcat in Eclipse does not use catalina.sh or bat. To setup memory for managed Tomcat use VM settings in server run configuration

blocks|key|355840|text|我有以下设置：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|355841|-vmargs
...
-Duser.name=...
-XX:PermSize=256m
-XX:MaxPermSize=256m
-Xmn128m
-Xms256m
-Xmx768m|code-block|syntax|javascript|355842|在我将PermSize设置为MaxPermSize之前，Eclipse随机崩溃。|355843|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I have these settings:

<pre><code>-vmargs
...
-Duser.name=...
-XX:PermSize=256m
-XX:MaxPermSize=256m
-Xmn128m
-Xms256m
-Xmx768m
</code></pre>

Eclipse randomly crashed before I set the PermSize equal to MaxPermSize.

blocks|key|356669|text|当我试图发布一个新版本或者滥用“标记实例”和“与编辑器链接”功能时，我的FLashBuilder总是崩溃。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|356670|通过遵循以下步骤http://www.redcodelabs.com/2012/03/eclipse-speed-up-flashbuilder/，我已显著提高了闪存性能|offset|length|356671|特别是通过将FlashBuilder.ini设置为以下配置|356672|-vm
C:/jdk1.6.0_25/bin
-startup
plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
–launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.100.v20110502
-product
org.eclipse.epp.package.jee.product
–launcher.defaultAction
openFile
–launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
–launcher.XXMaxPermSize
256m
–launcher.defaultAction
openFile
-vmargs
-server
-Dosgi.requiredJavaVersion=1.5
-Xmn128m
-Xms1024m
-Xmx1024m
-Xss2m
-XX:PermSize=128m
-XX:MaxPermSize=128m
-XX:%2BUseParallelGC|code-block|syntax|javascript|356673|我的硬件配置是英特尔i3处理器，4+4gb+DDR3，Windows7+64位。|356674|entityMap|0|LINK|mutability|MUTABLE|url|http://www.redcodelabs.com/2012/03/eclipse-speed-up-flashbuilder/^0|0|8|1T|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

My FLashBuilder is crashing all the time when I try to release a new version or I abuse of the "Mark Occurrences" and "Link with editor" features.

I have improved significantly my flash performance by following this steps <a href="http://www.redcodelabs.com/2012/03/eclipse-speed-up-flashbuilder/" rel="nofollow">http://www.redcodelabs.com/2012/03/eclipse-speed-up-flashbuilder/</a>

Especially by setting the FlashBuilder.ini to the following configuration 

<pre><code>-vm
C:/jdk1.6.0_25/bin
-startup
plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
–launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.100.v20110502
-product
org.eclipse.epp.package.jee.product
–launcher.defaultAction
openFile
–launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
–launcher.XXMaxPermSize
256m
–launcher.defaultAction
openFile
-vmargs
-server
-Dosgi.requiredJavaVersion=1.5
-Xmn128m
-Xms1024m
-Xmx1024m
-Xss2m
-XX:PermSize=128m
-XX:MaxPermSize=128m
-XX:+UseParallelGC
</code></pre>

My hardware configuration is intel i3 cpu, 4gb DDR3, windows 7 64Bit.

blocks|key|3353863|text|Adobe+Flash+Builder+4.6+Read建议您编辑Me.pdf实例的eclipse.ini文件，以便它包含以下设置：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353864|-vmargs+-Xms256m+-Xmx512m+-XX:MaxPermSize=256m+-XX:PermSize=64m|code-block|syntax|javascript|3353865|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Adobe Flash Builder 4.6 Read Me.pdf recommendeds that you edit the eclipse.ini file for your Eclipse instance, so that it includes the following settings:

<pre><code>-vmargs -Xms256m -Xmx512m -XX:MaxPermSize=256m -XX:PermSize=64m
</code></pre>

When trying to launch and run a flex/java project in eclipse I kept getting a "Out of Memory Exception" and "Java Heap Space" using Eclipse, Tomcat and a JRE.

While researching trying to adjust the memory settings I found three places to adjust these:

<ul>
<li>Eclipse.ini</li>
<li>The JRE Settings under Window > Preferences</li>
<li>Catalina.sh or Catalina.bat</li>
</ul>

What are the differences between setting -xms and -xmx in these different places and what does is mean?

Is there any way to verify these memory settings are being set accordingly?

What are the optimal -xms and -xmx settings for a computer with 2gb of RAM?

Any other memory tips?

Thanks.

Eclipse memory settings when getting "Java Heap Space" and "Out of Memory"

数据库

服务器

虚拟机

Eclipse

Java

当尝试在Eclipse中启动和运行flex/java项目时，我使用eclipse、Tomcat和JRE不断得到一个“内存不足异常”和"Java堆空间“。在研究尝试调整内存设置时，我发现有三个地方可以调整这些设置：窗口> Eclipse.iniThe或Catalina.bat下的Catalina.bat JRE设置在这些...

问获取"Java Heap Space“和"Out of Memory”时的Eclipse内存设置
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问获取"Java Heap Space“和"Out of Memory”时的Eclipse内存设置
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