C#•2y ago

❔ Sudden OutOfMemoryException due to OS change?

Let's imagine a WinForms .NET Framework 4.8 app is running on Win10 just fine, but under Win11 it suddenly causes OutOfMemoryExceptions due to exceeding the handle limit. Do you guys have a clue what could be the problem? fluffyFoxThink

15 Replies

qqdev•2y ago

No, would need a stack trace or similar

HimmDawgOP•2y ago

There are several stack traces with different causes

OutOfMemoryException
Nicht genÃ¼gend Arbeitsspeicher.
in System.Drawing

   bei System.Drawing.Graphics.FromHdcInternal(IntPtr hdc)
   bei System.Drawing.Font.get_SizeInPoints()

OutOfMemoryException
Nicht genÃ¼gend Arbeitsspeicher.
in System.Drawing

   bei System.Drawing.Graphics.FromHdcInternal(IntPtr hdc)
   bei System.Drawing.Font.get_SizeInPoints()

for example

qqdev•2y ago

Is the memory usage actually exploding?

HimmDawgOP•2y ago

Gradually, but it crashes only under win11

qqdev•2y ago

Yeah, we have to figure out if the app is the issue or win11 Because it is often times the app itself Are you loading fonts/images or similar?

HimmDawgOP•2y ago

Some custom listviews were made by people before me and those are loading a metric ton of icons. Other than that, images are rare and we only use default fonts

qqdev•2y ago

You could check the code or use a memory profiler to check if there is unreleased memory hiding somewhere Is the app actually using the whole memory of the system btw? (before it crashes)

HimmDawgOP•2y ago

I thought as much. It was just odd that only Win11 causes that problem fluffyFoxThink

it doesnt

qqdev•2y ago

Interesting Might be that the app always had this issue but only win11 is revealing it. Hard to tell Is the app using a lot of memory? In general

HimmDawgOP•2y ago

Not really. roughly 70 MB at most. And that's a pretty high estimation I am pretty sure the app always had a problem with GC and uncollected handles

qqdev•2y ago

You mentioned that the app is loading many icons Check if memory handling is fine there static code analysis might help too Idk if you use Rider or similiar

HimmDawgOP•2y ago

I'll do that foxNosy

thanks

qqdev•2y ago

You are welcome! meowheart

Cracker•2y ago

You can try to take memory dump to analyze if there is a memory leak on some operation, It was easy to take from web servers but I am not sure how to do that for desktop app, probably easier but should search

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Sudden OutOfMemoryException due to OS change?