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.NET Forum / ASP.NET / General / August 2007Help: Memory Management For My asp.net Managed Code!
VS2005 asp.net 2.0 C# Developing with File System/Cassini instead of IIS (publish to IIS every so often) Hello guys, I have a web app where I am using static variables on many pages to maintain values between postbacks. I am also using several static properties and methods on a class within my custom libraries (a .cs file in the App_Code folder). After constantly running the app while debugging (sometimes for three or four hours straight,) my machine begins to slow to a crawl. I ultimately receive a "System out of memory" message. The only program being run on this machine during this time is Visual Studio 2005 w/my web site (via the green triangle "Start Debugging" button) in the VS IDE. There is obviously some problem going on with memory management here. Apparently I still need to destruct/destroy some objects manually, since the .net garbage collector is not getting it. Questions: What am I doing wrong here? How do I free the memory? When I publish the site and run OUT of debug mode with IIS on the web server, will it make any difference? TIA JP The solution is very simple: *do not* use static fields in a Page class to attempt to maintain values between postbacks. Your alternatives are: 1) ViewState 2) Session 3) Hidden Form Fields 4) Cache -- Peter Recursion: see Recursion site: http://www.eggheadcafe.com unBlog: http://petesbloggerama.blogspot.com bogMetaFinder: http://www.blogmetafinder.com > VS2005 > asp.net 2.0 [quoted text clipped - 32 lines] > > JP On Aug 3, 3:54 pm, Peter Bromberg [C# MVP] <pbromb...@yahoo.yohohhoandabottleofrum.com> wrote: > The solution is very simple: *do not* use static fields in a Page class to > attempt to maintain values between postbacks. Your alternatives are: [quoted text clipped - 46 lines] > > - Show quoted text - That will require a lot of recoding! Does anyone know of a way to "destroy" the variables/free the memory with code? Static variable should not be a problem. Although if you are using it on a Page level then you most likely doing something wrong. All users of the site will share that variable. So you can not use them to maintain values between postbacks. Read up on "static" in C#. ----------------------------------------------------------- Do you use a COM objects in your project? Like may be you doing MS Office automation? That can easily lead to memory leaks (without proper coding) George. > On Aug 3, 3:54 pm, Peter Bromberg [C# MVP] > <pbromb...@yahoo.yohohhoandabottleofrum.com> wrote: [quoted text clipped - 52 lines] > That will require a lot of recoding! Does anyone know of a way to > "destroy" the variables/free the memory with code? > Static variable should not be a problem. Although if you are using it on a > Page level then you most likely doing something wrong. > All users of the site will share that variable. So you can not use them to > maintain values between postbacks. Read up on "static" in C#. Whoa! The static variables are members of the page class. I thought different page objects were being instatiated with each page view. Is this not true? > > Static variable should not be a problem. Although if you are using it on a > > Page level then you most likely doing something wrong. [quoted text clipped - 4 lines] > different page objects were being instatiated with each page view. Is > this not true? Okay Okay I think I get it. Since they are static, they are not instantiated in the first place! Right? You got it. Think of static variables as of "global variables" George >> > Static variable should not be a problem. Although if you are using it >> > on a [quoted text clipped - 9 lines] > Okay Okay I think I get it. Since they are static, they are not > instantiated in the first place! Right? > Think of static variables as of "global variables" Yes indeed. Static variables need *very* careful management in ASP.NET...  SignatureMark Rae ASP.NET MVP http://www.markrae.net Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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