java java堆空间问题，如何增加堆大小？
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Problems with java heap space, how to increas the heap size?
提问by Ikky
I'm running a ".bat" file which points to asant:
我正在运行一个指向 asant 的“.bat”文件：
C:\Sun\SDK\bin\asant Startbds
asant again points to a xml file i've got, build.xml:
asant 再次指向我得到的 xml 文件 build.xml：
<target name="Startbds" description="Start bds">
This has been fine for now, but now i have added more data, which leads to an out of memory error:
这暂时没问题，但现在我添加了更多数据，这导致了内存不足错误：
java.lang.outOfMemoryError: Java heap space
So i've tried to increase the heap space by various methods i've found while searching around for a solution:
因此，我尝试通过在四处寻找解决方案时发现的各种方法来增加堆空间：
- cmd: set
ANT_OPTS=-Xms512m -Xmx512m(did not work, same error message) - Editing the asant.bat where i edited the line "-set ANT_OPTS" from
- cmd: set
ANT_OPTS=-Xms512m -Xmx512m(不起作用，同样的错误信息) - 编辑 asant.bat，我从中编辑了“-set ANT_OPTS”行
.
.
set ANT_OPTS="-Dos.name=Windows_NT" -Djava.library.path=%AS_INSTALL%\lib;%AS_ICU_LIB%;%AS_NSS%" "-Dcom.sun.aas.installRoot=%AS_INSTALL%" "-Dcom.sun.aas.instanceRoot=%AS_INSTALL%" "-Dcom.sun.aas.instanceName=server" "-Dcom.sun.aas.configRoot=%AS_CONFIG%" "-Dcom.sun.aas.processLauncher=SE" "-Dderby.root=%AS_DERBY_INSTALL%"
TO
到
set ANT_OPTS="-Xms512m -Xmx512m" "-Dos.name=Windows_NT" -Djava.library.path=%AS_INSTALL%\lib;%AS_ICU_LIB%;%AS_NSS%" "-Dcom.sun.aas.installRoot=%AS_INSTALL%" "-Dcom.sun.aas.instanceRoot=%AS_INSTALL%" "-Dcom.sun.aas.instanceName=server" "-Dcom.sun.aas.configRoot=%AS_CONFIG%" "-Dcom.sun.aas.processLauncher=SE" "-Dderby.root=%AS_DERBY_INSTALL%"
but this gave me the error message:
但这给了我错误信息：
"Invalid initial heap size: -Xms512m -Xmx512m
Could not create the Java virtual machine."
Anyone got an idea of how i should increase the heapsize? And maybe also give a pointer to where i can find a tool to watch the heapsize.
有人知道我应该如何增加堆大小吗？也许还可以指出我在哪里可以找到观察堆大小的工具。
Thanks in advance.
提前致谢。
回答by Joachim Sauer
By using "-Xms512m -Xmx512m"you gave a single argument. -Xmsexpects the minimum heap size to be specified by the rest of the argument. So you defined the minimum heap size to be "512m -Xmx512m", which is not a valid value.
通过使用"-Xms512m -Xmx512m"你给出了一个论点。-Xms期望由参数的其余部分指定最小堆大小。因此，您将最小堆大小定义为“512m -Xmx512m”，这不是有效值。
You will want to provide those switches as two arguments:
您需要将这些开关作为两个参数提供：
set ANT_OPTS=-Xms512m -Xmx512m "-Dos.name=Windows_NT" ...
回答by Uri
I think that if you're in windows, you don't need the double quotes in your set. Here is an example I saw somewhere:
我认为如果你在 Windows 中，你不需要在你的集合中使用双引号。这是我在某处看到的一个例子：
set ANT_OPTS=-Xms512m -Xmx512m (Windows)
export ANT_OPTS="-Xms512m -Xmx512m" (ksh/bash)
setenv ANT_OPTS "-Xms512m -Xmx512m" (tcsh/csh)
As for monitoring heap usage, if you are using the most recent JDK on Windows, you should have Sun's VisualVM.
至于监控堆使用情况，如果你在 Windows 上使用最新的 JDK，你应该有 Sun 的 VisualVM。
回答by jean chen
in eclipse-> window->preferences->Tomcat->JVM Setting->Append to JVM Parameters
在 eclipse-> window->preferences->Tomcat->JVM Setting->Append to JVM Parameters
-XX:MaxPermSize=512m
-XX:MaxPermSize=512m
-Xms512m
-Xms512m
-Xmx512m
-Xmx512m
