1

I tried to increase the heap size like the below

 C:\Data\Guru\Code\Got\adminservice\adminservice>java -Xms512m -Xmx512m Usage: java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...] (to execute a jar file) where options include: -client to select the "client" VM -server to select the "server" VM -hotspot is a synonym for the "client" VM [deprecated] The default VM is client. -cp <class search path of directories and zip/jar files> -classpath <class search path of directories and zip/jar files> A ; separated list of directories, JAR archives, and ZIP archives to search for class files. -D<name>=<value> set a system property -verbose[:class|gc|jni] enable verbose output -version print product version and exit -version:<value> require the specified version to run -showversion print product version and continue -jre-restrict-search | -jre-no-restrict-search include/exclude user private JREs in the version search -? -help print this help message -X print help on non-standard options -ea[:<packagename>...|:<classname>] -enableassertions[:<packagename>...|:<classname>] enable assertions -da[:<packagename>...|:<classname>] -disableassertions[:<packagename>...|:<classname>] disable assertions -esa | -enablesystemassertions enable system assertions -dsa | -disablesystemassertions disable system assertions -agentlib:<libname>[=<options>] load native agent library <libname>, e.g. -agentlib:hprof see also, -agentlib:jdwp=help and -agentlib:hprof=help -agentpath:<pathname>[=<options>] load native agent library by full pathname -javaagent:<jarpath>[=<options>] load Java programming language agent, see java.lang.instrument 

It gave the help message as above - Does it mean that it was allocated?

2
  • How do you normally run your program? Commented Jun 8, 2010 at 13:09
  • That's just a help print, where it is trying to explain you how to properly use java.exe. Commented Jun 8, 2010 at 13:12

2 Answers 2

6

No, it means the command failed, because you didn't tell is what to run, like a Main class, e.g.

java -Xms512m -Xmx512m com.x.MyClass 

Other than that, your options are valid, yes.

Sign up to request clarification or add additional context in comments.

Comments

1

Nope,

You also have to give the either class name or a jar file name to execute. These options apply only to one instance of the virtual machine.

If you are trying to change the Heap allocation in your application server or development environment you have to look up how to supply the JVM options there, and slip your -Xms options in.

1 Comment

Thanks.I had to increase in the App Server.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.