The argument information can also incorporate the principle class name and all options. If an argument file contains all of the choices needed via the java command, then the command line could only be:
Home windows: If the option -agentlib:foo is specified, then the JVM makes an attempt to load the library named foo.dll in The situation specified by The trail program variable.
Logs messages tagged with both gc and ref tags, using the debug stage to stdout, with default decorations. Messages tagged only with one of the two tags received’t be logged.
Involves the use of CDS. This option prints an error message and exits if class data sharing can’t be made use of.
This feature is reminiscent of the JFR.begin diagnostic command that begins a recording through runtime. You could established the following parameters when starting up a JFR recording:
The next illustrations demonstrate the way to set the Preliminary dimensions with the youthful technology to 256 MB applying different units:
Utilize a volume of debug for some of the knowledge, or possibly a standard of trace for all of what was logged for PrintAdaptiveSizePolicy.
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If enabled, saves jstat binary info when the Java application exits. This binary info is saved inside of a file named hsperfdata_pid, the place pid is the procedure identifier of the Java application which you ran. Use thejstat command to display the functionality data contained On this file as follows:
Sets The proportion from the aged era occupancy (0 to 100) at which to get started on a CMS assortment cycle. The default value is ready to -1. Any adverse value (such as the default) implies that the option -XX:CMSTriggerRatio is utilized to outline the worth on the initiating occupancy fraction.
By default, this selection is disabled as well as the collector is chosen mechanically determined try this by the configuration of your equipment and kind on the JVM. In JDK nine, the CMS garbage collector is deprecated.
Enables the use of a policy that limitations the proportion of your time spent through the JVM on GC before an OutOfMemoryError exception is thrown. This feature is enabled, by default, as well as the parallel GC will toss an OutOfMemoryError if this link a lot more than 98% of the total time is spent on garbage selection and less than 2% in the heap is recovered.
Specifies the utmost measurement (in bytes) of disk details to keep with the default recording. Append k or K, to specify the size in KB, m or M to specify the dimensions in MB, or g or G to specify the size in GB. By default, the utmost size of disk knowledge isn’t constrained, and this parameter is ready to 0.
This is the professional element that needs you to also specify the -XX:+UnlockCommercialFeatures possibility. That is also an experimental attribute; it may well change in future releases.