Tuning WebLogic JRockit 8.1 JVM
This appendix lists the valid WebLogic JRockit JVM command line options in alphabetical order, by name.
Note: Options that begin with -X
are non-standard options (called "-X
options") and are subject to change at any time.
Tells WebLogic JRockit JVM where to look for classes and resources. |
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Tells WebLogic JRockit JVM to set a Java system property. These can be read by a Java program, using the methods in |
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Tells WebLogic JRockit JVM to display its product version number and then continue with startup. |
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Tells WebLogic JRockit JVM to display its product version number and then exit. |
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Tells WebLogic JRockit JVM to display a short help message on the extended options. |
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For details on these options, please refer to Table 2-2 in Tuning the WebLogic JRockit JVM. |
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Sets the search path for bootstrap classes and resources. Specify the names of the directories, |
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Defines when the memory space occupied by an object that has been garbage collected will be cleared. The parameters listed below determine when the space is cleared. For details on these options, please refer to Table 2-1 in Tuning the WebLogic JRockit JVM. |
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Deploys the specified garbage collector.
The default is |
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Causes WebLogic JRockit JVM to print a comprehensive garbage collection report at program completion. The option |
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Enables and disables groups of JVMPI events when running Note: JVMPI is an experimental feature in the Java 2 SDK and is not yet a standard profiling interface. |
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Enables the management server in the VM, which needs to be started before the Management Console can connect to WebLogic JRockit JVM. |
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Sets the initial size of the heap. You should set the initial heap size ( The default is 16 MB if maximum heap size is limited to less than 128 MB, otherwise 25% of available physical memory, but not exceeding 64 MB. This value can be specified in kilobytes ( |
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Sets the maximum size of the heap. You should set this value as high as possible, but not so high that it causes page-faults for the application or for some other application on the same computer. The default is the lesser of 75% of physical memory and 400 MB when running This value can be specified in kilobytes ( |
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Enables the Native Threads system. This option is the default, therefore you only need to specify it when you want to change the method from thin threads. |
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When specified, tells WebLogic JRockit JVM not to watch for or process |
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Sets the size of the young generation (nursery) in generational concurrent and generational copying garbage collectors (these are the only collectors that use nurseries). If you are creating a lot of temporary objects you should have a large nursery. The default is default is 10 MB per CPU with a This value can be specified in kilobytes ( |
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Sets the thread stack size; can be specified in kilobytes ( |
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Implements the WebLogic JRockit High Performance Threading System (Thin Threads). This option is not available on IA64. Warning: Thin threads is experimental functionality in this version of WebLogic JRockit, and is not recommended for general use. This feature is subject to change without notice. |
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Causes WebLogic JRockit to print to the screen, upon startup, specific information about the system. The information displayed depends upon the parameter specified with the one of these options: For a description of these options, please refer to Table 3-1 in Starting and Configuring WebLogic JRockit. |
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Tells WebLogic JRockit JVM to do complete bytecode verification. |