Programming Tutorials Browser Tutorials Articles Struts Tutorials Hibernate Tutorials

Search: 

  Tutorial: Cougaar Memory Profiler

Cougaar Memory Profiler Overview The Cougaar memory profiler is a tool for debugging memory usage and leaks in any Java application. It features a scalable 100% Java design that is lighter weight than existing JVMPI-based profilers (hprof, OptimizeIt(tm

Tutorial Details:

The profiler tracks memory usage within the application by using tables of WeakReferences. The developer selects which classes should be tracked and runs an automated classfile editor (using BCEL) to add profiling instructions to the constructors. The profiler maintains pointers to the live instances and can display useful debugging information:

* Total number of allocations of a profiled class, including the number of live and GC\'ed instances

* Free/used/max VM heap size and force GC

* Show instances in order of:
o allocation timestamp
o compareTo
o hashCode
o toString
o \"size\" (e.g. ArrayList.size() & String.length())
o \"capacity\" (e.g. ArrayList.elementData.length)
For example, find the largest HashMaps, ten newest \"com.Foo\", oldest \"com.Foo\", etc.

* Count unique occurences of:
o allocation stacktrace
o equals
o toString
o hashCode
o allocation timestamp (& mod second/minute/hour)
o \"size\" (& mod 100/1000)
For example, what\'s the most common allocation point for ArrayLists, which are the most common \"equals\" values (for potential caching), etc.

* Sample instances for the above order/count views. For example, randomly select 100 of the 1000+ Strings and show the 10 most common \"equals\" values.

* The profiler can be configured to randomly sample the allocations to further reduce runtime overhead on a per-class basis. For example, track 5% of allocated Strings. The UI will adjust the displayed data to match the sampling ratio(s).


 

Read Tutorial at: Click here to view the tutorial

Rate Tutorial:
Cougaar Memory Profiler

View Tutorial:
Cougaar Memory Profiler

Related Tutorials:

Displaying 1 - 50 of about 252 Related Tutorials.

Open Source Profilers written in Java

 
Open Source Profilers written in Java

 
Cougaar IDE
Cougaar IDE Cougaar IDE...; CougaarIDE -- An Integrated Development Environment for Cougaar CougaarIDE is being developed by Cougaar Software Inc., to support developers interested in using
 
Java get Free Memory
Java get Free Memory Java get Free Memory...;  In this section, we are going to obtain the free memory. In order to get the memory left of being allocated, the method getruntime() returns
 
Get Usage Memory Example
Get Usage Memory Example Get Usage Memory Example... in understanding Get Usage Memory. The class Memory Usage include the main method, that contain the following method -  !)Runtime.getRuntime( ).total Memory
 
Java Get Memory Usage
Java Get Memory Usage Java Get Memory Usage... be aware of that unlike c++,  java don't tell that how much memory is occupied... the used memory from the actual memory. As you know in Java programming memory
 
Objective-c memory management: retain and release
Objective-c memory management: retain and release, Objective C programming language, Objective C Language Objective-c memory... how to manage memory with language Objective-C. Programmer can allocate memory
 
How to set memory used by JVM in Ant
How to set memory used by JVM in Ant How to set memory used by JVM in Ant      ... to set memory size of JVM (java virtual machine), when ANT (another neat tool
 
Variables
Java: Variables Java Notes: Variables Variables are places in memory to store values. There are different kinds of variables, and every language offers slightly different
 
Thread Questions
of memory do separate threads share? Circle all that are correct. Call stack Heap Static memory They don't share any memory... the same virtual memory; threads do not. The communication cost is lower
 
Java Array Initialization
;  After declaring an array variable, memory is allocated to it. The "new" operator is used for the allocation of  memory
 
Variables and Types
Variables and Types Variables and Types Variable Data in memory is referred to by name... equivalent of a memory address. Type Every variable has a type (what kind
 
Java get Heap Size
size. The heap is the area in the memory used for memory storage during... amount of memory in the JVM.     Here is the code of GetHeapSize.java
 
Java: Garbage Collection
Garbage collection is the process of automatically finding memory blacks... automates this error-prone process. Manual deallocation The area of memory where... and deallocations. Manually managing the allocation and deallocation (freeing) of memory
 
OutOfMemoryError
Java NotesOutOfMemoryError If your Java program is running out of memory.... Avoid excessive object creation. Allocate more memory for the heap. Choose... are in memory, and typical reasons for running out of memory. Stack and Heap Memory
 
Variables in Java
. A variable refers to the memory location that holds values like: numbers, texts etc. in the computer memory. A variable is a name of location where the data... that the particular variable will hold certain amount of memory to store
 
The Cheapest Way To Speed Up Your PC
memory Then dont panic, adding memory to your current computer is one... memory. In this screen click the radio button that says Custom Size and put... some memory. Simply right click any where on your desktop and select properties
 
What is SDIO?
memory.  Using SDIO card, user can  get the option of  interchanging the data between portable or non-portable memory. Usually  SDIO card ... is the hybrid of  both SD card and I/O output device.  Memory can
 
Arrays
similar values in memory. Each value can be accessed by specifying... the array and allocate a fixed amount of memory... only enough memory for a reference (Java's name for an address or pointer
 
Open Source Java
schemes. he Cougaar memory profiler is a tool for debugging memory usage... that is lighter weight than existing JVMPI-based profilers. The profiler tracks memory
 
About IDE
-In for different application servers. ? Memory profiler and Memory leakage detection tools
 
Java Util Examples List
and classes for easy manipulation of in-memory data. The java util package
 
Deserializing an Object in java

 
Java Get Example
Get examples like how to get the date and time, IP Address or memory size etc... whether it is a database size or memory size using Java programming language... Memory Size:  With the help of the given Java code you can easily get
 
C and C++ books-page4
An array in C is a region of memory in which the elements (chars, ints, etc.) can
 
What is Persistence Framework?
What is Persistence Framework? What is Persistence Framework? A persistence framework moves the program data in its most natural form (in memory objects) to and from a permanent data
 
Open Source Cache Solution written in Java

 
Altova XMLSpy
& debugger XSLT 1.0/2.0 editor, debugger & profiler Project
 
IDE
Cougaar IDE CougaarIDE -- An Integrated Development Environment for Cougaar. CougaarIDE is being developed by Cougaar Software Inc., to support developers interested in using Cougaar.   
 
Eclipse Plunging/Testing
;    Hitchhiker Trace, profile or find memory leaks in any C... and profiler. Unit Tester is a unit test management system, it automatically
 
XML Parsers
the document into the  computer's memory. Once the document is loaded, its... the object tree in memory, so it is much more CPU and memory intensive. ... is present in memory, where it can be accessed and manipulated by the user. SAX
 
Java Data Types
for the memory allocation process. Like  int pedal = 1; This statement... to 32,767. short is used to save memory in large arrays. The syntax... memory in large arrays. We do not use this data type for the exact values
 
Introduction to Java Arrays
in the variables and takes the  memory spaces, randomly. However, when we need the data of the same type  to store in the contiguous memory allocations... enables the user to store the values of the same type in contiguous memory
 
Eclipse Plunging Source Code Analyzer
suite of products consisting of java code analyzer, unit tester and profiler
 
Hitchhiker
technology. Hitchhiker provides tracing, profiling, memory leak tracking and function...: Identify objects and methods that consume the most time Identify memory-intensive classes Gauge program concurrency Locate memory leaks Browse
 
What is Java I/O?
from an input source. An input source can be a file, a string, or memory... such as a file, a string, or memory containing the data. Like an input stream... the data from a disk file to the  internal memory and an OutputStream can
 
Java Array Declaration
It is essential to assign memory to an array when we declare it. Memory is assigned
 
What is BIOS?
and second to load the operating system (OS) onto the main memory... critical components like drives and memory, by  giving basic information 
 
Numbers
-128 to +127 because a byte integer requires only 1/4 the memory that an int... memory blocks are passed between the CPU and RAM there may not actually be any difference for small amounts of data! The exact way that memory is handled
 
Java - Array in Java
. By definition, array is the static memory allocation. It allocates the memory.... It also store the values in memory at the fixed size. Multiple types of arrays
 
Java Data Types
memory in large arrays using byte. We can also use byte instead of int ... memory in large arrays. long The long data type is a 64-bit signed two's complement... a float (instead of double) to save memory in large arrays. We do not use this data
 
Programming - Replace method
memory overflow. Iterative development hints Write the method header. Should
 
Ensemble Glider for Eclipse
environment requires little or no configuration, and is run entirely in memory
 
Summary - Basic Elements
. Where in memory Call stack. Heap. "Permanent" memory
 
Integers
stores integers in memory Java stores all integers in memory as binary numbers
 
Arrays -- 2-dimensional
to implement 2-dimensional arrays. Many languages reserve a block of memory large enough... to allocate memory for an array. For example, int[][] a2 = new int[10][5
 
Java Interview Questions - Page 6
: Does garbage collection guarantee that a program will not run out of memory... memory resources faster than they are garbage collected. It is also possible
 
GPS Mapping Software
;      GPS Memory Mapping Software Memory-Map... support is included. Memory-Map's high performance "QuickChart" scrolling
 
Buy SuSe 9.2 Live CDs in India from us. Suse 9.2 Live is available with us.
, the live CD consumes a lot of memory. Therefore, at least 384 MB RAM..., and other applications. Use a device such as a memory stick for saving files
 
Dialog and Console Input-Output
- Declaring a local variable. This tells the compiler to reserve some memory... the variable (a place in the computer's memory) "humanName". The syntax
 
Site navigation
 

 

Send your comments, Suggestions or Queries regarding this site at roseindia_net@yahoo.com.

Copyright © 2006. All rights reserved.