How To Fix Out Of Memory Error In Java Mobile
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in Java Everyone in java development faces java.lang.OutOfMemoryError now and then, OutOfMemoryError in Java is one problem which is more due to system's limitation (memory) rather than due to programming mistakes in most cases though in certain cases you could have out of memory error java/lang/outofmemoryerror nokia a memory leak which causing OutOfMemoryError. I have found that even though java.lang.OutOfMemoryError is
Outofmemoryerror Android
quite common basic knowledge of its cause and solution is largely unknown among junior developers. Beginners books like Head First Java doesn't java.lang.outofmemoryerror android teach you much about how to deal with this kind of error. You need real experience dealing with production systems, handling a large number of user sessions to troubleshoot and fix performance issues like running out of http://answers.microsoft.com/en-us/mobiledevices/forum/mdasha/out-of-memory-error-javalangout-of-memory-error/55bcc71d-3c2d-471a-a261-d19bbea156a4 memory. If you want to be good at troubleshooting and performance analysis, you need to learn some books on Java performance and profiling e.g. Java Performance The Definitive Guide By Scott Oaks or the Java Performance by Binu John. They are an excellent resource for senior Java developers and also teaches you tools and process to deal with an error like java.lang.OutOfMemoryError. In this article, we will explore what is java.lang.OutOfMemoryError; Why http://javarevisited.blogspot.com/2011/09/javalangoutofmemoryerror-permgen-space.html OutOfMemoryError comes in Java application, different type of OutOfMemoryError and How to fix OutOfMemoryError in Java. This article is purely meant to provide basic knowledge of java.lang.OutMemoryError and won't discuss profiling in detail. For profiling read the books I have mentioned before. What is java.lang.OutOfMemoryError in Java OutOfMemoryError in Java is a subclass of java.lang.VirtualMachineError and JVM throws java.lang.OutOfMemoryError when it ran out of memory in the heap. OutOfMemoryError in Java can come anytime in heap mostly while you try to create an object and there is not enough space on the heap to allocate that object. Javadoc of OutOfMemoryError is not very informative about this, though. Types of OutOfMemoryError in Java I have seen mainly two types of OutOfMemoryError in Java: 1) The java.lang.OutOfMemoryError: Java heap space 2) The java.lang.OutOfMemoryError: PermGen space Though both of them occur because JVM ran out of memory they are quite different to each other and their solutions are independent of each other. The difference between "java.lang.OutOfMemoryError: Java heap space" and "java.lang.OutOfMemoryError: PermGen space" If you are familiar with different generations on the heap and How garbage collection works in java and aware of new, old and permanent generation of heap space then you would have easily figured out this OutOfMemoryError in Java. Permanent generation of the heap is used
in Atlassian Cloud apps, the contents of this article cannot be applied to Atlassian Cloud applications. Purpose Java applications like JIRA, Crowd and Confluence run in a "Java virtual https://confluence.atlassian.com/confkb/how-to-fix-out-of-memory-errors-by-increasing-available-memory-154071.html machine" (JVM), instead of directly within an operating system. When started, the Java virtual machine is allocated a certain amount of memory, which it makes available to applications like Confluence. By default, Java virtual machines are allocated 64Mb of memory, no matter how many gigabytes of memory your server may actually have available. 64Mb is inadequate for most Confluence installations, and so this needs to error java be increased. Diagnosis Expand to see diagnosis section Determine type of error message Look in the atlassian-confluence.log to see which type of OutOfMemory Error you're receiving. There are three common messages: Heap Space Perm Gen Space GC Overhead This document discusses increasing memory to address PermGen and Heap space errors. Follow the links above to assess root causes for each issue. For GC java heap space Overhead, refer to Confluence Crashes Due to 'java.lang.OutOfMemoryError GC overhead limit exceeded'. Determine Confluence's usage patterns In Confluence, go to Confluence Administration > System Information , and look at the memory graph during times of peak usage: This server has been allocated a maximum of 650Mb and a minimum of 256m. You can see the minimum displayed here; if you're trying to see whether your settings are being picked up, this is where to look. Determine available system memory On Windows From the Close Programs Dialogue (Press ctrl-alt-delete), select the Performance tab: The amount marked Available is the amount in kilobytes you have free to allocate to Confluence. On this server we should allocate at most 214Mb. On Linux Run cat /proc/meminfo to view the memory usage. Setting the -Xmx above the available amount on the server runs the risk of OutOfMemoryErrors due to lack of physical memory. If that occurs the system will use swap space, which greatly decreases performance. Guidance The default values supplied with Confluence stand-alone are sufficient for most installations. Please refer to Managing Application Server Memory Settings and Server Hardware Requirements Guide for a discussion. Solution Ste