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Java Runtime Command Line Options


Memory about to be written with the value of new objects is prefetched up to this distance starting from the address of the last allocated object. Any class path wildcard expansion occurs before the Java VM is started. debug debug logs messages with detailed information of JRockit JVM's behavior. This parameter is valid only for size-bound recordings. http://analysedesgeeks.com/command-line/java-1-6-command-line-options.html

Note: The following steps might need to be completed by your system administrator, unless you have administrative privileges. Standard Options These are the most commonly used options that are supported by all implementations of the JVM. -agentlib:libname[=options] Loads the specified native agent library. In addition, the default Java HotSpot VMs provide a set of non-standard options that are subject to change in future releases. Max promoted: The maximum number of objects and amount of bytes promoted by any single garbage collection of this type during the run. http://docs.oracle.com/javase/7/docs/technotes/tools/windows/java.html

Java Command Line Options Parser

Browse other questions tagged java command-line parameters or ask your own question. When you specify -Xnoclassgc at startup, the class objects in the application will be left untouched during GC and will always be considered live. By default, the Client VM (-client) performs 1,000 interpreted method invocations and the Server VM (-server) performs 10,000 interpreted method invocations to gather information for efficient compilation. Do not deploy applications that use this option to override a class in rt.jar because this violates the Java Runtime Environment binary code license. -Xcheck:jni Performs additional checks for Java Native

Browse other questions tagged java jvm-arguments or ask your own question. The following strings are appended to the string given in this argument (space-delimited). By default, logging is performed for all compiled methods. Java Options Environment Variable share|improve this answer edited Nov 17 at 17:03 answered Feb 18 '11 at 19:26 maaartinus 21.1k1265159 1 Actually, System.getProperty("test", "true").equalsIgnoreCase("true") would be the better way to write the last condition.

This parameter is valid only if you set the disk=true parameter. Java Install Command Line Options It does this by starting the Java Runtime Environment (JRE), loading the specified class, and calling that class's main() method. repository=path Specifies the repository (a directory) for temporary disk storage. The possible decorations are listed in Table2-12.

Suspends this VM before main class loads. -Xrunjdwp:transport=dt_shmem,address=mysharedmemory This command: Attaches to a running debugger application via shared memory at transport address mysharedmemory. Java Options Xmx Operation Format: -Xverbose: Where param is one of the parameters described in Table2-10 and level the log level, as described in Log Levels. The javaw command is identical to java, except that with javaw there is no associated console window. To enable the JRockit JVM to allocate large pages, make a hugetblfs file system available by using this command: mount -t hugetlbfs nodev /mnt/hugepages Grant the user executing the Java application

Java Install Command Line Options

For Example: java -Xmanagement:ssl=false,authenticate=false myApplication Disables SSL encryption and authentication. For example, to instruct JFR to write a continuous recording to disk, and set the maximum size of data chunks to 10 MB, specify the following: -XX:FlightRecorderOptions=defaultrecording=true,disk=true,maxchunksize=10M -XXLargePageSizeInBytes=n Specifies the Java Command Line Options Parser more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Jvm Command Line Options The default value depends on virtual memory.

thread sampling occurs only if the sampling event is enabled along with this parameter. http://analysedesgeeks.com/command-line/java-runtime-command-line-arguments.html This option is equivalent to the JFR.start diagnostic command that starts a recording during runtime. java -jar myApplication.jar -Dtest="true" But I receive a NullPointerException. By default, this option is disabled and large page memory is not used. Java 8 Command Line Options

Note: Since these options are non-standard, they are subject to change at any time. For more information about instrumenting Java applications, see the java.lang.instrument package description in the Java API documentation at http://docs.oracle.com/javase/8/docs/api/java/lang/instrument/package-summary.html -jre-restrict-search Includes user-private JREs in the version search. -no-jre-restrict-search Excludes user-private This design is already reflected in the constructor:OptionData(Options.Prefix prefix, String key, boolean detail, Options.Separator separator, boolean value, Options.Multiplicity multiplicity) The key is used as the unique identifier for this option. http://analysedesgeeks.com/command-line/java-command-line-switches.html The static garbage collectors are classified as in Table 2-2 Static Garbage Collectors Single-Spaced Generational Concurrent Single-spaced concurrent -Xgc: singlecon Generational concurrent -Xgc: gencon Parallel Single-spaced parallel -Xgc:singlepar (since R27.2)

Hot Network Questions Why would a decision making machine decide to destroy itself? Java Option Class This option is also helpful when you suspect that a JVM or application problem, such as a system crash or poor startup performance, might be related to optimization. WEB_JAVA=1, the default, enables Java applications in the browser.

The -XX:TLABSize option enables fine-tuning the size of TLABs. -XX:+UnlockCommercialFeatures Use this flag to actively unlock the use of commercial features.

At debug level this module displays an improved version of the information previously displayed by -Xverbose:referents. Negative values denote that prefetch distance is chosen based on the platform. Default Value Description help no N/A Prints a brief help message and exits the VM. Java Command Line Options Cp Append the letter k or K to indicate kilobytes, m or M to indicate megabytes, g or G to indicate gigabytes.

The following example shows how to set the prefetch distance to 1024 bytes: -XX:AllocatePrefetchDistance=1024 Only the Java HotSpot Server VM supports this option. -XX:AllocatePrefetchInstr=instruction Sets the prefetch instruction to prefetch ahead This collector will prioritize throughput to pause times. See Notes for important policy information on the use of this option. this content The intent was to enable user cleanup code (such as closing database connections) to run at shutdown, even if the Java VM terminates abruptly.

Note that the launched process is not started in its own window. By default, it is set to info. The output for a garbage collection started by other means will have the reason for the garbage collection printed out, for example: [INFO ][sysgc ] GC triggered for reason: Set Nursery transport yes none Name of the transport to use in connecting to debugger application.

To add several commands, either specify the -XX:CompileCommand option multiple times, or separate each argument with the newline separator (\n).