java memory leak

An accidental opportunity to discover that a process uses more than 14G of memory. This process is an RPC server, just as a transit, absolutely should not use so much memory. Even if there is too much concurrency and there is too much data in memory, this memory usage will definitely come down in the case of concurrenc

What can JVISUALVM do VisualVM is NetBeans's profile subproject, which has been brought in JDK6.0 update 7 (Java startup does not require specific parameters, and the monitoring tool is bin/ Jvisualvm.exe), capable of monitoring threads, memory conditions, viewing methods of CPU time and in-memory objects, objects that have been GC, reverse-viewing allocated s

On Android, context can be used for many operations, but most of the time it is used to load and use resources. This is why all widgets accept a context parameter in their constructor. In a typical Android app, you usually have two kinds of context: activity and application, respectively. Often, when our classes and methods need to be used in the context, we pass on the context of activity.[Java] @Override protected void onCreate (Bundle state)

Memory leaks in C + + generally refer to memory leaks in the heap. Heap memory is our manual malloc/realloc/new request, the program does not automatically recycle, need to call free or delete manual release, otherwise it will cause a memory leak.

Linux/C + +on common memory leak detection tools areValgrind, Rational purify. Valgrindfree. Valgrindcan be in +bit or -bitPowerpc/linuxwork on the kernel. Valgrind The toolkit contains several tools, such asMemcheck,cachegrind,helgrind, Callgrind,Massif. Here are some of the tools that you'll work with:Memcheck the tool mainly checks for the following program errors:? use of uninitialized

In the example, the vector object's Reference object and the object object are referenced in the code stack. in the For loop, we constantly generate new objects, add them to the vector object, and then empty the object reference. The problem is that when the O reference is empty, if a GC occurs, the object we create can be recycled by GC. The answer is in the negative. because, when the GC traces a reference in the code stack, it finds a vector reference and continues to follow it . you will

When it comes to memory leaks, most programs ape smell the color change. Yes, memory leaks are very easy to introduce. But it's very difficult to locate. Take your My phone as an example (if not often shut down). If you leak some memory every day, you will find your phone is good for the first one weeks. When

in the Devices view interface;6. Click the "Cause GC" button in the heap view;7. In the heap view, you will see the details of the memory usage of the currently selected process.DescriptionA) Clicking on the "Cause GC" button is equivalent to requesting a GC operation from the virtual machine;b) When the memory usage information is displayed for the first time, there is no need to continuously click on "Ca

Transfer from http://blog.csdn.net/xocoder/article/details/42685685Since the project is currently in charge of a two-time development project, and left our code quality is not able to spit groove, so encountered a lot of large and small pits, fortunately, slowly trickling past. Recently encountered a memory leak problem, the leak occurred in Lua, the project code

Tags: java Web springmvc hibernate jdbc MySQL1. Error descriptionCritical: The Web application [/amst] registered the JDBC driver [Org.logicalcobwebs.proxool.ProxoolDriver] but failed to Unregi Ster it when the Web application was stopped. To prevent a memory leak, the JDBC Driver have been forcibly unregistered. August 10, 2015 2:57:44 pm Org.apache.catalina.loa

I. Introduction to memory leaks: Memory leaks are categorized in the way they occur, and memory leaks can be divided into 4 categories: 1. Frequent memory leaks. The code that occurs in memory leaks is executed multiple times, causing a