jvm-arguments

问题 Suppose I have a Java program Test.class , if I used the below script for i in 1..10 do java Test done the JVM would exit each time java Test is invoked. What I want is running java Test multiple times without exiting the JVM, so that, the optimized methods in prior runs can be used by later runs, and possibly be further optimized. 回答1: public class RunTest { public static void main(String[] args) { for(int i=1; i<=10; i++) Test.main(args); } } This should do it. You can call the Test class'

问题 I have a program which needs to allocate heap space for one very large object, but I'm finding that I get OutOfMemoryException s when there appears to be much more free heap than that large object should require. This test program demonstrates the problem: public class HeapTest { public static void main(String[] args) { final int size = Integer.parseInt(args[0]); System.out.println(size >> 20); final byte[] buf = new byte[size]; System.out.println(buf.length); } } If I run it as java -Xmx40M

问题 This question already has answers here : How to make the jvm load my java.lang.String instead of the one in rt.jar (2 answers) Closed 5 years ago . Basically I want to replace the Canvas class at runtime by an application that uses my custom Canvas class, I heard xbooting can do this but there are no tutorials or anything. So I'm just wondering what the vm arguments are, can you help me please? 回答1: By xboooting you probably mean the -Xbootclasspath parameter? You can use the -Xbootclasspath

问题 I have tried to configure it like this but there will be an exception！ <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <skip></skip> <executable>true</executable> <embeddedLaunchScriptProperties> <property> <name>inlinedConfScript</name> <value>/app/knowledge-base.conf</value> </property> </embeddedLaunchScriptProperties> </configuration> </plugin> </plugins> </build> Failed to execute goal org

问题 I have the JRE v1.6 that is 32-bit installed. When I attempt to run a program as follows: java -Xms1024m -Xmx2048m net.analysis.MyProg I see the following message displayed: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine As far as I know, the maximum heap allowed for a 32-bit JVM is 2 GB. On the computer running my code there is 131061 MB of physical memory (using Window's Task Manager, 128 GB of RAM). Does

问题 We read an important parameter as vm argument and it is a path to a file. Now, users are using vm argument with some korean characters (folders have been named with korean characters) and the program started to break since the korean characters are read as question marks! The below experiment shows the technical situation. I tried to debug a program in eclipse and in "Debug Configurations" under "arguments" tab in "VM arguments", I gave the input like this -Dfilepath=D:\XXXX\카운터 But when I

问题 This question already has answers here : JVM sending back memory to OS [duplicate] (3 answers) Closed last year . I am running from time to time in eclipse tasks that require very big amount of memory. So jvm while task is running swallows about 2-3gb of RAM, that is ok. But once jvm took that memory it does not release it and I have a situation when used memory in the heap is about 200mb with total heap size about 3gb and that is really unwanted as other programs are starving for memory. I

问题 I would like to set -noverify as a VM argument through java code. I could not find any resource online to help with this. If I use System.setProperty(..,..) , what do I set as the value or perhaps the key? I have tried using System.property("Xverify","none") but this doesn't seem to work. Note : This is just to run some test cases. I am turning off byte code verification because of this issue - link Thank you. 回答1: Let me summarize comments in this answer. It is dangerous to turn the bytecode

问题 I am trying to set up a microservice in Amazon ECS. How can JVM arguments be configured and passed to the microservice? 回答1: We do this sort of thing by passing them as env variables on the task. When you edit your container in your task, scroll down to the Env Variables section: You can then reference these as normal env variables on the command line when you launch your application. 回答2: You can set an ENTRYPOINT in your Dockerfile like: ENTRYPOINT ["java","-Xms1024m","-Xmx1800m","-jar","

问题 I would like to specify a custom value for java.io.tmpdir in eclipse.ini file. Specifically, I need to have a username as part of the path. I see the following entry in my eclipse.ini : -Dosgi.instance.area.default=@user.home/eclipse-workspace But when I try to use similar lines for my purpose: -Djava.io.tmpdir=/tmp/eclipse_@user.name -Djava.io.tmpdir=/tmp/eclipse_{@user.name} -Djava.io.tmpdir=/tmp/eclipse_@{user.name} -Djava.io.tmpdir=/tmp/@user.name I end up with the following directories