jvm-arguments

问题 Task 'Xmx512m' not found in root project 'MyProject' in gradle.properties it's showing Xmx1024m. How can i get rid off this gradle build error? My OS is windows 10. build.gradle Module apply plugin: 'com.android.application' android { compileSdkVersion 25 buildToolsVersion "25.0.2" defaultConfig { applicationId "in.ravisir.mateinstitute" minSdkVersion 17 targetSdkVersion 24 } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard

问题 I have a maven project which extends an existing parent project (It's the "standard product" from which my product will be a "Customized product"). The parent declares a org.codehaus.cargo / cargo-maven2-plugin and passes it some VM args under configuration / cargo.jvmargs . Like this: <plugin> <groupId>org.codehaus.cargo</groupId> <artifactId>cargo-maven2-plugin</artifactId> <version>1.4.18</version> <configuration> <container> <containerId>tomcat8x</containerId> [...] <dependencies> [...] <

问题 Update I've configured both xms (initial memory) and xmx (maximum memory allocation jvm paramters, after a restart i've hooked up Visual VM to monitor the Tomcat memory usage. While the indexing process is running, the memory usage of Tomcat seems ok, memory consumption is in range of defined jvm params. (see image) So it seems that filesystem buffers are consuming all the leftover memory, and does not drop memory? Is there a way handle this behaviour, like change nGram size or

问题 Trying to write an excel file using the following code public static void main(String[] args) { XSSFWorkbook workbook = new XSSFWorkbook(); XSSFSheet sheet = workbook.createSheet("Book Data"); Map<String, Object[]> data = new TreeMap<String, Object[]>(); data.put("1", new Object[] {"ID", "NAME", "LASTNAME"}); for(int i=2;i<100000;i++) { data.put(String.valueOf(i), new Object[] {i, "Name"+i, "LastName"+i}); } Set<String> keyset = data.keySet(); int rownum = 0; for (String key : keyset) { Row

问题 I'm building a jar of my current application, which required several JVM arguments to be set. Is there a way of setting these JVM arguments in a file rather than on the command line? I've done some hunting and it looks like I might be able to do something witha java.properties file, possibly by setting a java-args, but I can't find any reference to the format for doing this. Am I barking up the wrong tree? Is this possible and if so how? If not is there some other way to specify the JVM

问题 First of all I am new to WLS. I have been searching for this issue since yesterday but couldn't find a solution. I am getting this error: C:\Oracle\MIDDLE~1\JDK160~1\bin\java -client -Xms512m -Xmx1024m -XX:CompileThreshold=8000 -XX:PermSize=512m -XX:MaxPermSize=1024m -Dweblogic.Name=DefaultServer - .... Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I have setted the JVM options in setDomainEnv.cmd (I am on

问题 I'm beginning use the -Xmx option on the java command to allow my processes to use a little more memory (256Mb, though I think I'm currently using less than 128Mb). I've also noticed the -Xms option for starting memory, with a default value of 2Mb. What should I set this value to and why? Reference: Java 回答1: The -Xmx argument defines the max memory size that the heap can reach for the JVM. You must know your program well and see how it performs under load and set this parameter accordingly.

问题 I am debugging a memory leak in an application running on Sun's JDK 1.4.2_18. It appears that this version supports the command line param -XX:+HeapDumpOnCtrlBreak which supposedly causes the JVM to dump heap when it encounters a control-break. How does one send this to a background process on a Linux box? It appears that kill signals are the way this ought to work, but I kill -l doesn't report anything that is obviously a Ctrl-Break, at least on my Ubuntu box. Update: I tested Kill -3 with

问题 I see this parameter in all kinds of places (forums, etc.) and the common answer it help highly concurrent servers. Still, I cannot find an official documentation from sun explaining what it does. Also, was it added in Java 6 or did it exist in Java 5? (BTW, a good place for many hotspot VM parameters is this page) Update: Java 5 does not boot with this parameter. 回答1: In order to optimise performance, the JVM uses a "pseudo memory barrier" in code to act as a fencing instruction when

问题 How can I find which Java options (Xmx, Xms, Xss, etc) are being used by Maven? I've found out that a way to set them is via the environment MAVEN_OPTS. Now I want a way to be assured it's getting the right settings. EDIT: I believe it´s different to this question as I don´t want to see the value of an environment variable. I rather want to see which settings are actually being used by Maven, whether it comes from a env var, settings.xml or other means. EDIT2: I'm also interested in other