Finding Process Memory Leak?

I have been tracking down memory leaks in a Java server-based application. I recently ran the application for several hours, and monitored memory usage with both JConsole and the Unix �top� command. I encountered some behaviors that I don�t understand.
With JConsole, I observed that the heap memory usage was fairly constant over time. The Code Cache space, however, gradually increased in size over the life of the test. I expected some increase as additional methods in the application were executed, but it seems that eventually the rate of increase would level out. It did not. Any ideas why that might happen?
The resident memory (as reported by top) increased significantly over the life of the test. Using pmap and jmap, I was able to determine that the heap space was increasing (even though JConsole reported that the heap was constant.) So, it seems as though the heap usage of the application is constant, but the heap usage of the process is still growing? I am using Java HotSpot VM for Solaris (1.6.0-b105).
Any suggestions or insight would be appreciated.

I'm not sure exactly what you're saying, but it sounds like this:
A tool that's monitoring the VM says the memory used by your objects is not increasing, but other tools say the memory the VM has taken from the OS is increasing.
Is that the case? If not, nevermind--I've misunderstood.
If that is the case, then it's totally expected. The VM doesn't usually give memory back to the OS. If it hasn't used up the amount specified by -Xmx (or the default if you didn't specify -Xmx), it's free to just keep grabbing memory from the OS, rather than running a full GC to reclaim memory that it has used for objects but that is no longer reachable.

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Can't find the memory leak in Managed Object

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Once the keychain had updated itself, I restarted the iMac again, and Mail returned to normal (no more requests for mail account passwords).
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Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, or by a peripheral device.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

Imagent process memory leak

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Finding Memory Leak in LabVIEW

Hi NG,
we wrote a sort of hugh application in labview that collaborates with our
..NET driven
device framework and a variaty of unmanged c++ libs.
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up that
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We used prefomance counter to check whether the managed objects might not
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could use to figure out
where the problem is?
Any help is greatly appreciated.
Thanks in advance, Sebastian Dau!

"mfitzsimons" <[email protected]> wrote in message
news:[email protected]..
> Sebastian,
> Memory leaks can be VERY hard to find.  I use the divide and conquer
> technique that involves chunking (make into smaller code segments) your
> code into smaller pieces and running the smaller pieces until you find the
> memory leak.  It can take weeks to find the source.
you accelerate this process by using the labview profiler.
> The most common is arrays or any data that increases in size as the
> program runs.  To fix this you can use a FIFO that allows only so
> many elements to be added before deleting data out of the array.  The
> second source is opening references repeatedly and not closing them. 
> Look closely at any VI that open anything.  Do a search for "Memory
> Leak" on the discussion forum and you will find about 60 postings that may
> help. 
> Matt
> If you are using DAQ-MX <a
> href="http://digital.ni.com/public.nsf/allkb/BAF29EE03747EE4B86256E9700541436?OpenDocument"
> target="_blank">http://digital.ni.com/public.nsf/allkb/BAF29EE03747EE4B86256E9700541436?OpenDocument</a>
>  
>
arrays and refs have already been checked.
thanks, Sebastian

Finding Memory Leak

Is it possible to find the memory leak using the following command
java -Xprof <classname>Regards
ackumar

Here is the output for one of my class. I didn't use any "java.net" class in my code.
But it shows java.net.SocketInputStream.socketRead() is interpreted 50.0%
I am in bit confusion . So plz help me.
Flat profile of 93.41 secs (4041 total ticks): main
Interpreted + native   Method
50.0%     0 + 2012    java.net.SocketInputStream.socketRead0
0.0%     0 +     1    java.lang.ClassLoader$NativeLibrary.load
0.0%     0 +     1    java.net.SocketOutputStream.socketWrite0
0.0%     0 +     1    java.lang.ClassLoader.defineClass0
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0.0%     0 +     1    com.mysql.jdbc.SingleByteCharsetConverter.<clinit>
0.0%     0 +     1    com.mysql.jdbc.MysqlIO.checkErrorPacket
0.0%     0 +     1    com.mysql.jdbc.Connection.<init>
50.2%     0 + 2019    Total interpreted
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0.4%    15 +     0    cern.colt.matrix.impl.DenseDoubleMatrix2D.zMult
0.2%     7 +     0    java.lang.FloatingDecimal.readJavaFormatString
0.1%     4 +     0    com.mysql.jdbc.ResultSet.getString
0.1%     0 +     3    java.lang.String.<init>
0.1%     3 +     0    com.mysql.jdbc.SingleByteCharsetConverter.toString
0.0%     2 +     0    cern.colt.matrix.impl.DenseDoubleMatrix2D.getQuick
0.0%     2 +     0    com.mysql.jdbc.Buffer.readFieldLength
0.0%     0 +     2    java.io.BufferedInputStream.read1
0.0%     1 +     1    java.lang.FloatingDecimal.doubleValue
0.0%     2 +     0    java.lang.Integer.parseInt
0.0%     1 +     0    java.util.ArrayList.get
0.0%     1 +     0    java.util.HashMap.hash
0.0%     1 +     0    com.mysql.jdbc.MysqlIO.readFully
0.0%     1 +     0    com.mysql.jdbc.Connection.getCharsetConverter
0.0%     1 +     0    com.mysql.jdbc.ResultSet.getInt
0.0%     1 +     0    cern.colt.matrix.impl.DenseDoubleMatrix1D.assign
1.2%    42 +     6    Total compiled
         Stub + native   Method
48.3%     0 + 1943    java.net.SocketInputStream.socketRead0
48.3%     0 + 1943    Total stub
Thread-local ticks:
0.4%    18             Blocked (of total)
0.0%     2             Interpreter
0.3%    11             Compilation
Flat profile of 0.01 secs (1 total ticks): DestroyJavaVM
Thread-local ticks:
100.0%     1             Blocked (of total)
Global summary of 93.43 seconds:
100.0% 4127             Received ticks
2.1%    85             Received GC ticks
0.0%     2             Interpreter

Finding Memory leaks in C using Visual Studio 2013

I am using Visual Studio 2013, and taking a course in C programming and we started
talking about memory bugs detaction, in particular memory leaks, and how to detect them using Valgrind on Linux.
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because:
1) It sounds so complex, convoluted and unintuitive it is actually hard to comprehend it.
2) The main reason this is weird is due to the fact that VS is the most advanced IDE around and Microsoft spends so much money on in, yet from what I have read it seems that there is no simple way to use VS to detect memory leaks
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Hi MicrosoftLaw,
Thanks for your post.
Based on your issue, if you want to check if there are memory leaks in the C program from this VS2013. I suggest you could try to find Memory Leaks Using the CRT Library, for more information:
https://msdn.microsoft.com/en-us/library/x98tx3cf.aspx?f=255&MSPPError=-2147217396
In addition, I find a similar thread about this issue, please you refer the Dusty's suggestion to check this issue.
http://stackoverflow.com/questions/45627/how-do-you-detect-avoid-memory-leaks-in-your-unmanaged-code
I did some research about this issue, I found that the Visual Leak Detector extension tool is a free, robust, open-source memory leak detection system for Visual C++. So if possible, I suggest you could try to use the Visual Leak Detector extension
tool to find the memory leak for Visual C/ C++ program.
https://visualstudiogallery.msdn.microsoft.com/7c40a5d8-dd35-4019-a2af-cb1403f5939c
However, if you have any issue about how to use this Visual Leak Detector extension tool to find the memory leak for C program. I suggest you could directly to write a review to this REVIEW tab in Visual Leak Detector site.
Best Regards,
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Hello all,
This is fairly known problem. But I guess, my problem gives a new dimention to the problem.
I have an application which is developed by me. This application ideally needed to use third party classes ( obviously no source code is supplied ). These third party classes provide extra functionality required.
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many thanks for your time.
Madhav

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Can you help mi. Novice
mail [email protected]

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Hi,
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I`ve found it:
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Finding Process Memory Leak?

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