Hi,

I am facing memory leak problem when using SF BusinessObject and DevExpress ASPxDataGridView.

I have simple test project, which only has one BO, bind to ASPxDataGridView. It does nothing complicated, just load all records in Page_Load if not IsPostBack.



I found that, the memory usage would become double when I just "refresh" the page. I also used dotTrace profiler and found that # of BO instances keep increasing. I suspect it is the same issue with the post http://forum.strataframe.net/Topic20903-8-1.aspx.



I have prepared sample project and the dotTrace memory profiler files for your reference. MemoryLeak1.dtm is first load memory snapshot and MemoryLeak2.dtm is 2nd snapshot after refresh.



As the file size > 30MB, please download it from http://www.visualsolutions.com.my/blog/chankk/WebApplication6.zip



Hope you could get back to me as soon as possible! It is very urgent!



Thank you

Chan,

The screen shot you provided doesn't do me any good.  We have taken the sample that you have provided and NOT had the same results.  You already know that if we are to help you we are going to need some form of reproduction otherwise there is nothing we can do for you.  Please provide a sample that reproduces the issue.  I would strongly suggest that you make sure that you have the most recent build and assemblies loaded that I sent to you the other day.  I never posted the source online, so if you recompiled the source, then you are not running the most recent build.

This has happened to you in the past where you accidentally had the wrong version of the assemblies in your environment.  Using the most recent StrataFrame assemblies, we are not experiencing this using a WBBS and a grid.  However, I will not say that the possibility of what you are experiencing doesn't exist...but without a sample that we can reproduce on our side, there is very little I can do in this type of circumstance.

Hi,

OK, I will prepare sample for it.



However, I would like to double clarify with you, the MicroFour StrataFrame Business.dll shipped with latest Setup (fix thread safe issue) is version 1.6.6.9 and file size 781KB? Because the hot fix that you sent me last time (fix memory leak) is 1.6.6.8 with file size 801KB. I was thinking you 1.6.6.8 might contains debug info therefore is larger.



Does 1.6.6.9 include the memory leak fix as well?



Please advice.



Thank you

Yes.  As for the file size, I am unsure why it was smaller other than I might have sent you just that one file in debug mode.  But your assessment is correct.

Hi,

I have created sample project, which is exactly the same as previous one. It only contains 1 BO and DevExpress GridView. I keep reload the page and below is the log of memory taken by each drop



First Load - 52564

First Memory Drop - 55316

Second Memory Drop - 56260

Third Memory Drop - 56284

Fourth Memory Drop - 56400

Fiveth Memory Drop - 57268

and etc



I recorded video. Please download it from



http://www.visualsolutions.com.my/blog/chankk/memory.zip



I also recorded using performance monitor which as attached. During performance monitoring, I found that, the memory will keep increasing, drop, stay at same level for a while, then will increase again for some time (this jump will be almost back to previous before drop level and more), then drop again (but is higher that previous drop), stay for a while and increase again.



The sample project is very simple, therefore the memory leak is not that serious. If I run my web app, it easily eat up few hundred MB.



Sample Project: http://www.visualsolutions.com.my/blog/chankk/WebApplication12.zip



Please advice. Thank you