Specifies The trail and file name to which error details is composed when an irrecoverable error occurs. By default, this file is produced in the current Doing work directory and named hs_err_pid pid.log the place pid may be the identifier of the procedure that triggered the error.
Minimize Java heap size by decreasing the values in the parameters MaxHeapFreeRatio (default worth is 70%) and MinHeapFreeRatio (default benefit is forty%) Using the command-line possibilities -XX:MaxHeapFreeRatio and -XX:MinHeapFreeRatio. Decreasing MaxHeapFreeRatio to as little as ten% and MinHeapFreeRatio to 5% has productively minimized the heap dimensions without having excessive functionality regression; nonetheless, outcomes might differ greatly based on your software.
Sets the occupancy threshold for an old region being included in a combined rubbish selection cycle. The default occupancy is eighty five p.c.
The default worth is preferred at runtime based upon system configuration. For server deployments, -Xms and -Xmx will often be set to a similar price. The subsequent illustrations present how to set the most allowed sizing of allocated memory to 80 MB employing various models:
scalb(double d, int scaleFactor) Return d × 2scaleFactor rounded like done by just one properly rounded floating-level multiply to your member in the double value established.
Sets the ratio involving younger and aged generation measurements. By default, this feature is about to two. The subsequent example shows the way to established the younger-to-outdated ratio to 1:
Specifies reference a list of directories, JAR documents, and ZIP archives to append to the top of your default bootstrap course path.
Use the next Innovative runtime possibilities to maintain the Java heap tiny and lessen the dynamic footprint of embedded purposes:
.., the swap disables assertions in the desired deal and any subpackages. In the event the argument is just ..., then the change disables her response assertions inside the unnamed deal in The present Performing Listing. Along with the classname argument, the change disables assertions in the required class.
This ratio is utilized when the -XX:+UseRTMDeopt solution is enabled. The default price of this option is 50. Consequently the compiled code is deoptimized if fifty% of all transactions are aborted.
Permits the dumping on the Java heap into a file in The present Listing by utilizing the heap profiler (HPROF) each time a java.lang.OutOfMemoryError exception is thrown.
Generates the VM but doesn’t execute the principle strategy. This --dry-operate possibility is likely to be handy for validating the command-line choices such as the module system configuration.
Specifies the utmost dimensions (in bytes) of disk knowledge to keep for your default recording. Append k or K, to specify the scale in KB, m or M to specify the size in useful link MB, or g or G to specify the scale in GB. By default, the most sizing of disk facts isn’t limited, which parameter is set to 0.
String objects which are promoted to an previous heap region just before this age has actually been reached are normally viewed as candidates for deduplication. The default price for this feature is three. See the -XX:+UseStringDeduplication option.