"Gunnar Valur" <GunnarVa***@discussions.microsoft.com> wrote in message
news:2C632526-94D8-4C69-87E0-3E72CF33073A@microsoft.com...
> Hi,
>
> I am using VB 2005 and have been having problems with memory usage in
> services.  After some investigation I think I have found that DataSets
> leak
> memory!
>
> So I created a simple test
>
> 1) Create a new Windows Application
> 2) Added an Empty DataSet
> 3) Put a button on the form and then added this code.
>
> Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles Button1.Click
>        While True
>            For k As Integer = 0 To 100000
>                Dim ds As New DataSet1
>                ds.Dispose()
>                ds = Nothing
>            Next
>
>            GC.Collect()
>            MsgBox((GC.GetTotalMemory(True) / 1024).ToString())
>        End While
>    End Sub
>
> The Message box will tell me how much memory wasn't GCed and I get these
> results
>
> 2507K
> 4587K
> 7168K
> ...
>
> So my question is.  Do DataSets leak memory? Or am I doing something
> wrong?
>
> BTW: I see no leak if I am in Release Mode, only in Debug, with or without
> the debugger.
>
>
>
>

"William (Bill) Vaughn" wrote:

> Then it's Visual Studio leaking memory... not the DataSet. ;)
>
> --
> ____________________________________
> William (Bill) Vaughn
> Author, Mentor, Consultant
> Microsoft MVP
> INETA Speaker
> www.betav.com/blog/billva
> www.betav.com
> Please reply only to the newsgroup so that others can benefit.
> This posting is provided "AS IS" with no warranties, and confers no rights.
> __________________________________
> Visit www.hitchhikerguides.net to get more information on my latest book:
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> and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook)
> -----------------------------------------------------------------------------------------------------------------------
>
> "Gunnar Valur" <GunnarVa***@discussions.microsoft.com> wrote in message
> news:2C632526-94D8-4C69-87E0-3E72CF33073A@microsoft.com...
> > Hi,
> >
> > I am using VB 2005 and have been having problems with memory usage in
> > services.  After some investigation I think I have found that DataSets
> > leak
> > memory!
> >
> > So I created a simple test
> >
> > 1) Create a new Windows Application
> > 2) Added an Empty DataSet
> > 3) Put a button on the form and then added this code.
> >
> > Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
> > System.EventArgs) Handles Button1.Click
> >        While True
> >            For k As Integer = 0 To 100000
> >                Dim ds As New DataSet1
> >                ds.Dispose()
> >                ds = Nothing
> >            Next
> >
> >            GC.Collect()
> >            MsgBox((GC.GetTotalMemory(True) / 1024).ToString())
> >        End While
> >    End Sub
> >
> > The Message box will tell me how much memory wasn't GCed and I get these
> > results
> >
> > 2507K
> > 4587K
> > 7168K
> > ...
> >
> > So my question is.  Do DataSets leak memory? Or am I doing something
> > wrong?
> >
> > BTW: I see no leak if I am in Release Mode, only in Debug, with or without
> > the debugger.
> >
> >
> >
> >
>
>
>

"Gunnar Valur" <GunnarVa***@discussions.microsoft.com> wrote in message
news:2C632526-94D8-4C69-87E0-3E72CF33073A@microsoft.com...
> Hi,
>
> I am using VB 2005 and have been having problems with memory usage in
> services.  After some investigation I think I have found that DataSets
> leak
> memory!
>
> So I created a simple test
>
> 1) Create a new Windows Application
> 2) Added an Empty DataSet
> 3) Put a button on the form and then added this code.
>
> Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles Button1.Click
>        While True
>            For k As Integer = 0 To 100000
>                Dim ds As New DataSet1
>                ds.Dispose()
>                ds = Nothing
>            Next
>
>            GC.Collect()
>            MsgBox((GC.GetTotalMemory(True) / 1024).ToString())
>        End While
>    End Sub
>
> The Message box will tell me how much memory wasn't GCed and I get these
> results
>
> 2507K
> 4587K
> 7168K
> ...
>
> So my question is.  Do DataSets leak memory? Or am I doing something
> wrong?
>
> BTW: I see no leak if I am in Release Mode, only in Debug, with or without
> the debugger.
>
>
>
>

"Miha Markic [MVP C#]" wrote:

> Hi Gunnar,
>
> I doubt it leaks memory, I'll try this code with a memory profiler...
>
> --
> Miha Markic [MVP C#, INETA Country Leader for Slovenia]
> RightHand .NET consulting & development www.rthand.com
> Blog: http://cs.rthand.com/blogs/blog_with_righthand/
> "Gunnar Valur" <GunnarVa***@discussions.microsoft.com> wrote in message
> news:2C632526-94D8-4C69-87E0-3E72CF33073A@microsoft.com...
> > Hi,
> >
> > I am using VB 2005 and have been having problems with memory usage in
> > services.  After some investigation I think I have found that DataSets
> > leak
> > memory!
> >
> > So I created a simple test
> >
> > 1) Create a new Windows Application
> > 2) Added an Empty DataSet
> > 3) Put a button on the form and then added this code.
> >
> > Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
> > System.EventArgs) Handles Button1.Click
> >        While True
> >            For k As Integer = 0 To 100000
> >                Dim ds As New DataSet1
> >                ds.Dispose()
> >                ds = Nothing
> >            Next
> >
> >            GC.Collect()
> >            MsgBox((GC.GetTotalMemory(True) / 1024).ToString())
> >        End While
> >    End Sub
> >
> > The Message box will tell me how much memory wasn't GCed and I get these
> > results
> >
> > 2507K
> > 4587K
> > 7168K
> > ...
> >
> > So my question is.  Do DataSets leak memory? Or am I doing something
> > wrong?
> >
> > BTW: I see no leak if I am in Release Mode, only in Debug, with or without
> > the debugger.
> >
> >
> >
> >
>
>

"Gunnar Valur" <GunnarVa***@discussions.microsoft.com> wrote in message
news:2C632526-94D8-4C69-87E0-3E72CF33073A@microsoft.com...
> Hi,
>
> I am using VB 2005 and have been having problems with memory usage in
> services.  After some investigation I think I have found that DataSets
> leak
> memory!
>
> So I created a simple test
>
> 1) Create a new Windows Application
> 2) Added an Empty DataSet
> 3) Put a button on the form and then added this code.
>
> Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles Button1.Click
>        While True
>            For k As Integer = 0 To 100000
>                Dim ds As New DataSet1
>                ds.Dispose()
>                ds = Nothing
>            Next
>
>            GC.Collect()
>            MsgBox((GC.GetTotalMemory(True) / 1024).ToString())
>        End While
>    End Sub
>
> The Message box will tell me how much memory wasn't GCed and I get these
> results
>
> 2507K
> 4587K
> 7168K
> ...
>
> So my question is.  Do DataSets leak memory? Or am I doing something
> wrong?
>
> BTW: I see no leak if I am in Release Mode, only in Debug, with or without
> the debugger.
>
>
>
>

"W.G. Ryan [MVP]" wrote:

> Is this the actual code?  How does this loop every stop?  Where does True
> get flipped to false?
> "Gunnar Valur" <GunnarVa***@discussions.microsoft.com> wrote in message
> news:2C632526-94D8-4C69-87E0-3E72CF33073A@microsoft.com...
> > Hi,
> >
> > I am using VB 2005 and have been having problems with memory usage in
> > services.  After some investigation I think I have found that DataSets
> > leak
> > memory!
> >
> > So I created a simple test
> >
> > 1) Create a new Windows Application
> > 2) Added an Empty DataSet
> > 3) Put a button on the form and then added this code.
> >
> > Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
> > System.EventArgs) Handles Button1.Click
> >        While True
> >            For k As Integer = 0 To 100000
> >                Dim ds As New DataSet1
> >                ds.Dispose()
> >                ds = Nothing
> >            Next
> >
> >            GC.Collect()
> >            MsgBox((GC.GetTotalMemory(True) / 1024).ToString())
> >        End While
> >    End Sub
> >
> > The Message box will tell me how much memory wasn't GCed and I get these
> > results
> >
> > 2507K
> > 4587K
> > 7168K
> > ...
> >
> > So my question is.  Do DataSets leak memory? Or am I doing something
> > wrong?
> >
> > BTW: I see no leak if I am in Release Mode, only in Debug, with or without
> > the debugger.
> >
> >
> >
> >
>
>
>

> This is just a test program I wrote to check that indeed the DataSet is
> leaking.  If you run it long enought it will crash with an
> OutOfMemoryException
>
>
>
> "W.G. Ryan [MVP]" wrote:
> > Is this the actual code?  How does this loop every stop?  Where does True
> > get flipped to false?
> > "Gunnar Valur" <GunnarVa***@discussions.microsoft.com> wrote in message
> >news:2C632526-94D8-4C69-87E0-3E72CF33073A@microsoft.com...
> > > Hi,
>
> > > I am using VB 2005 and have been having problems with memory usage in
> > > services.  After some investigation I think I have found that DataSets
> > >leak
> > > memory!
>
> > > So I created a simple test
>
> > > 1) Create a new Windows Application
> > > 2) Added an Empty DataSet
> > > 3) Put a button on the form and then added this code.
>
> > > Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
> > > System.EventArgs) Handles Button1.Click
> > >        While True
> > >            For k As Integer = 0 To 100000
> > >                Dim ds As New DataSet1
> > >                ds.Dispose()
> > >                ds = Nothing
> > >            Next
>
> > >            GC.Collect()
> > >            MsgBox((GC.GetTotalMemory(True) / 1024).ToString())
> > >        End While
> > >    End Sub
>
> > > The Message box will tell me how much memory wasn't GCed and I get these
> > > results
>
> > > 2507K
> > > 4587K
> > > 7168K
> > > ...
>
> > > So my question is.  Do DataSetsleakmemory? Or am I doing something
> > > wrong?
>
> > > BTW: I see noleakif I am in Release Mode, only in Debug, with or without
> > > the debugger.- Hide quoted text -- Show quoted text -