Re: [mat-dev] Eclipse

["Tsvetkov, Krum" <krum.tsvetkov@xxxxxxx>]

Hello Esteban,

 

MAT works with heap dumps, so the first thing you’ll need is to get a heap dump. Looking at your example, it will be easy to let the VM write one when an OutOfMemoryError occurs. See “Getting a heap dump” [1] for more details.

Then switch to the “Memory analysis” perspective and open the generated heap dump file.

Running the leak suspect report [2] could be a starting point in the analysis.

 

In your case the tool should point to the main thread and a huge Object[]. If you use a 1.6 JDK you would also be able to see the stacktrace.

 

Additional info you can find in the Memory Analyzer help pages. Just go in your Eclipse to “Help” -> “Help Contents” and find Memory Analyzer there.

 

If you need some further help, let us know.

 

Regards,

Krum

 

[1] http://wiki.eclipse.org/index.php/MemoryAnalyzer#Getting_a_Heap_Dump

[2] http://memoryanalyzer.blogspot.com/2008/05/automated-heap-dump-analysis-finding.html

 

Krum Tsvetkov
SAP AG
www.sap.com

http://www.sap.com/company/legal/impressum.epx

 

---

From: mat-dev-bounces@xxxxxxxxxxx [mailto:mat-dev-bounces@xxxxxxxxxxx] On Behalf Of Esteban Alvarez
Sent: Sonntag, 10. April 2011 21:12
To: mat-dev@xxxxxxxxxxx
Subject: [mat-dev] Eclipse
Importance: High

 

Hello,

 

This weekend I have started to use the tool of Memory Analyzer in Eclipse Classic 3.6.2, but I am having many problems with the execute.

 

1º) For start I have installed the tool of Memory Analyzer (Help -> Install new software...).

2º) Then I created a new Java Project.

3º) In the new Java Project, I have created a Class with this code:

 

 

    import java.util.ArrayList;

            import java.util.List;

             

            public class MemoryAnalicer {

                       private static List<Integer> memoryLeakArea=new ArrayList<Integer>();

                       public static void main(String [] args){

                                   int iteration=0;

                                   while(true){

                                              Integer increaseNumber=new Integer(iteration);

                                              memoryLeakArea.add(increaseNumber);

                                              iteration++;

                                              System.out.println(iteration);

                                   }

                       }          

            }

           

4º) With this code I want detect the memory leaks that it generate with the execute, I know that with the Memory Analyzer it's possible

      but I don't know how.

 

 

For this reason, I would like it to ask you if you can hep me with the problems that I have with Memory Analyzer.

 

Thanks so much for the answer,

Best regards,

Esteban.