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From Daniel López Robles <dalo...@acotelsa.com>
Subject Re: [users@httpd] [SOLVED] Apache 2.2.14 and "Allow service to interact with desktop"
Date Thu, 19 Nov 2009 11:11:19 GMT
Hello:

We found the problem. 

We have a lot of virtual hosts, which are launching a lot of rotatelog.exe processes, which
are consuming so much memory that the desktop heap is getting exhausted. About desktop heap:

http://blogs.msdn.com/ntdebugging/archive/2007/01/04/desktop-heap-overview.aspx

By default, it seems that Windows 2003 Server x64 allows 768 KB for the desktop heap associated
with the non-interactive processes, and 20480 KB for the desktop heap associated with the
interactive processes. This way, by allowing Apache to interact with the desktop, what we
are really achieving is giving more memory to the rotatelog.exe processes to consume. Desktop
heap is not exhausted and the problems are gone. Of course, the problem is that this way we
see a lot of cmd windows in the desktop, because now they "are" interactive. The real solution
is changing the following registry value:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\SubSystems\Windows

The default data for this registry contains:

SharedSection=1024,20480,768

The second value is for interactive processes, and the third value is for the non-interactive
processes, so we have to increase the third value.

Desktop heap can be monitorized with Microsoft's Desktop Heap Monitor:

http://www.microsoft.com/downloads/details.aspx?familyid=5CFC9B74-97AA-4510-B4B9-B2DC98C8ED8B&displaylang=en#RelatedDownloads

I hope this will help someone else.

Best regards.

Daniel
  ----- Original Message ----- 
  From: Daniel López Robles 
  To: users@httpd.apache.org 
  Sent: Monday, November 16, 2009 1:34 PM
  Subject: Re: [users@httpd] Apache 2.2.14 and "Allow service to interact with desktop"


  Hello:

  I tried with the last httpd.exe (2.2.14) and I had the same problem: I had to check the
"Allow service to interact with desktop" checkbox in the properties of the Apache2.2 service
in order to get the Logical disk manager working. So I change the subject of the mail.

  Thank you.

  Daniel
    ----- Original Message ----- 
    From: Daniel López Robles 
    To: users@httpd.apache.org 
    Sent: Friday, November 13, 2009 12:30 PM
    Subject: [users@httpd] Apache 2.2.11 and "Allow service to interact with desktop"


    Hello:

    I have a weird problem with Apache and Windows 2003 Server that I haven't been able to
figure out:

    HP Proliant DL580 G5
    Windows Server 2003 R2 Standard x64
    Apache 2.2.11

    With that configuration, if I double-click "My PC", "Manage" and I go to "Disk manage",
an error is given: "Unable to connect to logical disk manager"

    The weird thing is that if I check the "Allow service to interact with desktop" checkbox
in the properties of the Apache2.2 service, the problem is solved. ¿? The new problem now
is that when connecting to the machine via Terminal Server with the /console parameter, a
lot of cmd windows appear, due to the rotatelogs. 

    I hope someone could give me some clue about the dependencies between Apache and Logical
disk manager, and/or an alternative to rotatelog.exe, in order to eliminate those annoying
cmd windows. I tried mod_log_rotate but it didn't work properly with the error log.

    Thank you very much.

    Daniel

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