2013-01-15-53170-win_x86-devprev open handles leak

Case number:845829-994414
Opened by:Bletchley Park
Opened on:Friday, January 25, 2013 - 20:32
Last modified:Wednesday, January 30, 2013 - 10:02

There is a growing number of open handles in this client.
We have had this issue in the past.

I had 135.000+ open handles which slows down the system.

I restarted the PC and in a relatively short time (hour) it has grown the number of handles again to 17800.
The number goes up and down, but the net result is growing number of open handles.


(Fri, 01/25/2013 - 20:32  |  9 comments)

katfish's picture
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Joined: 01/09/2013

Thanks for the report, Bletchley. Assigning this one out.

Angus's picture
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Joined: 06/04/2008
Groups: Beta Folders

Is that all on one client?

I have a WinXP client that's been running almost 3 days without a crash (amazing in itself !), and it only has 612 handles open while running recipes on 670. It's had over half-a-billion page faults, but that's a different issue.

Joined: 05/19/2009
Groups: Contenders

This was on a system that had run at most 7 concurrent clients, of which several had crashed over time.

Your page faults are caused by memory being swapped out to disk. Pagefault is a name for memory that is not in physical memory bur 'paged' out to disk. These pages are usually 4 kilobytes in size. It is normal behaviour in a PC, but will impact performance significantly. If you have plenty of RAM (12+ Gb) I recommend you turn off the swap file in windows.

Joined: 11/10/2007
Groups: Window Group

Is there a specific puzzle where this happens most, or a specific recipe to run?

Joined: 05/19/2009
Groups: Contenders

I'd try one with lots of mutates and lots of banding.
Mutate combo for mutates for example on 670. gab may give enough bands and try a small puzzle where bands are quickly created and destroyed again.

The underlying idea is that whatever is done, is done often and involves a step of creating and changing/deleting. Wiggle and shake will likely have nothing to do with it.

Joined: 11/10/2007
Groups: Window Group
Status: Open » Open

I've also run the client for some time, running Mutate combo on 670 and didn't see an increase in open handles - are you using a specific program to view open handles?

Joined: 05/19/2009
Groups: Contenders

Windows task manager, its now at 39000 again. 'some time' may be read as overnight, 24 hours. Multiple clients. You might try a heavy banding script ?

Joined: 11/10/2007
Groups: Window Group

Can you use Performance Monitor to see how many handles the Foldit process is using and what they are?


Joined: 05/19/2009
Groups: Contenders
Status: Open » Closed

Thank you for that suggestion. You are correct, foldit is not the cause of the increasing handles issue. I retract my feedback and apologize for the work it caused.

I use Gigabyte motherboards on all my systems, a tool that comes with the boards is causing it.


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