Hi,
I am developing a financial application and you know that there are huge
amount of data in these similar aplications. I have a MDIChild form and the
other forms are opened in this form. For example, in a form i fetch many
rows from the database to show them to the user on the client machine. After
this process memory gets higher but when the user closes that form the
memory remains same amount.
I am using IDisposable interface for my entities and i use GC.Collect() and
GC.SuppressFina lize() method for my entities while they are being disposed.
But i cannot achieve to reduce the amount of the memory. How can i reduce
the amount of memory after the user closes the form? Is there a way to get
that result immediate after the user closes the form in C#? Thanks...
13  1933 
How are you measuring the memory footprint?
Mike Ober.
"Adam Right" <ad**@right.com wrote in message
news:Ot******** ******@TK2MSFTN GP03.phx.gbl...
Hi,
I am developing a financial application and you know that there are huge
amount of data in these similar aplications. I have a MDIChild form and
the other forms are opened in this form. For example, in a form i fetch
many rows from the database to show them to the user on the client
machine. After this process memory gets higher but when the user closes
that form the memory remains same amount.
I am using IDisposable interface for my entities and i use GC.Collect()
and GC.SuppressFina lize() method for my entities while they are being
disposed. But i cannot achieve to reduce the amount of the memory. How can
i reduce the amount of memory after the user closes the form? Is there a
way to get that result immediate after the user closes the form in C#?
Thanks...
Hi Mike,
I do not understand what do you mean with Memory footprint? If you ask where
am i looking for the current memory size, i use task manager. Can you
explain in details? Thanks...
"Michael D. Ober" <obermd.@.alum. mit.edu.nospamw rote in message
news:%2******** ********@TK2MSF TNGP03.phx.gbl. ..
How are you measuring the memory footprint?
Mike Ober.
"Adam Right" <ad**@right.com wrote in message
news:Ot******** ******@TK2MSFTN GP03.phx.gbl...
>Hi,
I am developing a financial application and you know that there are huge
amount of data in these similar aplications. I have a MDIChild form and
the other forms are opened in this form. For example, in a form i fetch
many rows from the database to show them to the user on the client
machine. After this process memory gets higher but when the user closes
that form the memory remains same amount.
I am using IDisposable interface for my entities and i use GC.Collect()
and GC.SuppressFina lize() method for my entities while they are being
disposed. But i cannot achieve to reduce the amount of the memory. How
can i reduce the amount of memory after the user closes the form? Is
there a way to get that result immediate after the user closes the form
in C#? Thanks...
On Oct 17, 10:13 am, "Adam Right" <a...@right.com wrote:
Hi,
I am developing a financial application and you know that there are huge
amount of data in these similar aplications. I have a MDIChild form and the
other forms are opened in this form. For example, in a form i fetch many
rows from the database to show them to the user on the client machine. After
this process memory gets higher but when the user closes that form the
memory remains same amount.
I am using IDisposable interface for my entities and i use GC.Collect() and
GC.SuppressFina lize() method for my entities while they are being disposed.
But i cannot achieve to reduce the amount of the memory. How can i reduce
the amount of memory after the user closes the form? Is there a way to get
that result immediate after the user closes the form in C#? Thanks...
Adam,
First, I just want to clarify the situations where IDisposable should
be used. Use IDisposable only for class that directly or indirectly
hold unmanaged resources. If your objects just hold information about
entities from the database then I'd bet they don't hold unmanaged
resources at all. Second, you should only be overriding the finalizer
(destructor) and calling GC.SuppressFina lize when the class directly
holds unmanaged resources. Third, GC.Collect is rarely needed. The
runtime does a pretty good job determining when the GC needs to run.
Manual calls to GC.Collect often lead to poorer performing
applications.
Are you certain these objects are no longer referenced anywhere?
Brian
Hi Brian,
Firstly i want to clarify the meaning of unmanaged and managed code. I did
not understand at all so i need help about that. Second, my baseentity has
some fields which are another entity or arraylist or hashtable. So they are
all referenced types. According to this i dispose them when the dispose
method is called but i donot dispose them when the destructor of the entity
is called. Calling GC.SuppressFina lize(entity) is done in the same manner.
On the other hand, i only call the GC.Collect() when i closes the form. I
use it in my form base. I know that GC.Collect() is not good for the
performance. But the problem is the client memory and i have to reduce the
amount of the memory after the user closes the form. In brief, all objects
that were created for the related form and its controls, must be released
after the form is closed.
For your question, how can i find the answer of "the objects are no longer
referenced anywhere?"? In C#, couldn't we release the all objects after the
related form is closed? I think we should because it is C#. Thanks...
"Brian Gideon" <br*********@ya hoo.comwrote in message
news:11******** **************@ e3g2000cwe.goog legroups.com...
>
On Oct 17, 10:13 am, "Adam Right" <a...@right.com wrote:
>Hi,
I am developing a financial application and you know that there are huge
amount of data in these similar aplications. I have a MDIChild form and
the
other forms are opened in this form. For example, in a form i fetch many
rows from the database to show them to the user on the client machine.
After
this process memory gets higher but when the user closes that form the
memory remains same amount.
I am using IDisposable interface for my entities and i use GC.Collect()
and
GC.SuppressFin alize() method for my entities while they are being
disposed.
But i cannot achieve to reduce the amount of the memory. How can i reduce
the amount of memory after the user closes the form? Is there a way to
get
that result immediate after the user closes the form in C#? Thanks...
Adam,
First, I just want to clarify the situations where IDisposable should
be used. Use IDisposable only for class that directly or indirectly
hold unmanaged resources. If your objects just hold information about
entities from the database then I'd bet they don't hold unmanaged
resources at all. Second, you should only be overriding the finalizer
(destructor) and calling GC.SuppressFina lize when the class directly
holds unmanaged resources. Third, GC.Collect is rarely needed. The
runtime does a pretty good job determining when the GC needs to run.
Manual calls to GC.Collect often lead to poorer performing
applications.
Are you certain these objects are no longer referenced anywhere?
Brian
"Adam Right" <ad**@right.com wrote in message
news:#S******** ******@TK2MSFTN GP04.phx.gbl...
Hi Brian,
Firstly i want to clarify the meaning of unmanaged and managed code. I did
not understand at all so i need help about that. Second, my baseentity has
some fields which are another entity or arraylist or hashtable. So they
are all referenced types. According to this i dispose them when the
dispose method is called but i donot dispose them when the destructor of
the entity is called. Calling GC.SuppressFina lize(entity) is done in the
same manner.
On the other hand, i only call the GC.Collect() when i closes the form. I
use it in my form base. I know that GC.Collect() is not good for the
performance. But the problem is the client memory and i have to reduce the
amount of the memory after the user closes the form. In brief, all objects
that were created for the related form and its controls, must be released
after the form is closed.
. .
If you are going to call GC.Collect() and expect the form and all of it's
reachable objects to be collected, you need to do it _after_ the form is
closed and and no reference to the form exists from any of your application
roots.
So calling GC.Collect() from the form itself is the wrong time. You should
do it from the bit of code that created the form, after the form has been
closed and any references to the form cleared.
David
If you are going to call GC.Collect() and expect the form and all of
it's reachable objects to be collected, you need to do it _after_ the
form is closed and and no reference to the form exists from any of
your application roots.
So calling GC.Collect() from the form itself is the wrong time. You
should do it from the bit of code that created the form, after the
form has been closed and any references to the form cleared.
In addition, because a Form ultimately overrides the Object.Finalize () method
in the System.Componte ntModel.Compone nt ancestor, it will take two garbage
collections to free its memory. This is because, an object with a finalizer
is placed in a separate internal table (the "freachable " table) and survies
the first GC. See the "Finalizati on Internals" section in Jeffrey Richter's
artcile for details: http://msdn.microsoft.com/msdnmag/issues/1100/gci/
Best Regards,
Dustin Campbell
Developer Express Inc.
"Dustin Campbell" <du*****@no-spam-pleasedevexpres s.comwrote in message
news:c1******** *************** ***@news.micros oft.com...
>If you are going to call GC.Collect() and expect the form and all of
it's reachable objects to be collected, you need to do it _after_ the
form is closed and and no reference to the form exists from any of
your application roots.
So calling GC.Collect() from the form itself is the wrong time. You
should do it from the bit of code that created the form, after the
form has been closed and any references to the form cleared.
In addition, because a Form ultimately overrides the Object.Finalize ()
method in the System.Componte ntModel.Compone nt ancestor, it will take two
garbage collections to free its memory. This is because, an object with a
finalizer is placed in a separate internal table (the "freachable " table)
and survies the first GC. See the "Finalizati on Internals" section in
Jeffrey Richter's artcile for details:
http://msdn.microsoft.com/msdnmag/issues/1100/gci/
Form.Close() calls Component.Dispo se() which calls GC.SupressFinal ize(this).
So properly closed forms will not be on the FReachable queue and will be
collected with one pass.
David
Form.Close() calls Component.Dispo se() which calls
GC.SupressFinal ize(this). So properly closed forms will not be on the
FReachable queue and will be collected with one pass.
Of course you're right. My apologies for jumping in their without thinking
it through.
Best Regards,
Dustin Campbell
Developer Express Inc.
Hi,
To achieve reducing the amount of memory to the initial value which is
before opening the form, is there a way to get this expected result after
closing the form in C#? I have tried IDisposable interface for my entities
and GC.Collect() but it did not work.
Thanks...
"Adam Right" <ad**@right.com wrote in message
news:Ot******** ******@TK2MSFTN GP03.phx.gbl...
Hi,
I am developing a financial application and you know that there are huge
amount of data in these similar aplications. I have a MDIChild form and
the other forms are opened in this form. For example, in a form i fetch
many rows from the database to show them to the user on the client
machine. After this process memory gets higher but when the user closes
that form the memory remains same amount.
I am using IDisposable interface for my entities and i use GC.Collect()
and GC.SuppressFina lize() method for my entities while they are being
disposed. But i cannot achieve to reduce the amount of the memory. How can
i reduce the amount of memory after the user closes the form? Is there a
way to get that result immediate after the user closes the form in C#?
Thanks...
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