By default, the directory server selects a bit JVM regardless of the architecture. This options should be specified when a large JVM heap is required greater than 4 Gbytes and the architecture is bit. Selects the initial and maximum memory sizes available to the JVM, respectively.
These values are used for the JVM heap, which reserves memory for the directory server and its database DB cache or caches if more than one. Increasing the amount of memory available can improve performance, but increasing it to too high a value can have a detrimental effect in the form of longer pauses for full garbage collection runs.
Therefore, the initial and maximum sizes should be set to the same value. Based on the folders' combined size, determine how much memory you want to reserve for the DB cache. After determining this value, tune the local DB back-end properties, db-cache-percent or db-cache-size and other JVM options appropriately. Be careful to allow additional memory for the server runtime. You can test this setup by preloading the database with the local database back end by using the preload-time-limit property.
Prevents external applications from forcing expensive garbage collections. If you are using jstatd or other RMI-based applications to monitor Oracle Unified Directory, you should consider using this option in order to avoid unexpected pauses.
In heavy throughput environments, you should consider using this option to increase the size of the JVM young generation. By default, the young generation is quite small, and high throughput scenarios can result in a large amount of generated garbage.
This garbage collection, in turn, causes the JVM to inadvertently promote short-lived objects into the old generation. Selects the CMS garbage collector. This garbage collector is set for low pause time. It will result in a Java application that has a lower average throughput, but much shorter CPU-intensive garbage collections. This option is required in environments that have response time constraints. Selects the parallel old generational garbage collector. This garbage collector is set for high throughput.
It will maximize the average throughput of the import-ldif utility at the cost of an occasional stop-the-world garbage collection, which is not as critical to imports. Selects client application run-time optimizations. The application will be faster to start and more responsive due to lower compilation overheads.
For example, to specify a particular JDK 1. For example, to specify that a maximum heap size of Mbytes be used for the online export, edit the line that starts with export-ldif. If you use the GUI installer, you can configure Java runtime settings as part of the install process.
Eclipse defines the following notions of location:. While users can set any of these locations, Eclipse will compute reasonable defaults if values are not given. The most common usecase for setting location is the instance area or, in the IDE context, the workspace. To run the default Eclipse configuration on a specific data set you can specify:. Locations are URLs. For simplicity, file paths are also accepted and automatically converted to file: URLs.
For better control and convenience, there are also a number of predefined symbolic locations which can be used. Note that not all combinations of location type and symbolic value are valid. A table below details which combinations are possible. Since the default case is for all locations to be set, valid and writable, some plug-ins may fail in other setups even if they are listed as possible.
For example, it is unreasonable to expect a plug-in focused on user data e. It is up to plug-in developers to choose the setups they support and design their functionality accordingly. In particular, without a configuration location the Eclipse runtime may only get as far as starting the OSGi framework. JVM is an abstract computing machine, or virtual machine. It is a platform-independent execution environment that converts Java bytecode into machine language and executes it.
Where is the JVM options file? Category: technology and computing programming languages. How do I know my heap size? The Memory utilization by the 'process' shown by operating system commands such as top unix or Task Manager Windows is NOT the java heap usage.
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