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From "Eric Covener" <>
Subject Re: [users@httpd] Apache 2.2.8 / Win2003 - Non Paged Pool blows up
Date Sat, 14 Jun 2008 11:15:46 GMT
On Sat, Jun 14, 2008 at 4:39 AM, Nick Knack <> wrote:
> Hi,
> We've been trying to diagnose an issue showing up for the past several
> months on our Windows Server 2003 machines (both x32 and x64) running Apache
> 2.2.8 (with SSL). Just using it for PHP scripts - PHProxy and the like.
> 1. After some period of time (every 2 hours yesterday for example), the Non
> Paged Pool usage of Apache surges to (on x64) 18TB or thereabouts -
> basically close to the max positive signed 64 bit integer
> (18446744073709551616).

Do you have some reason to expect this is anything but Windows
mis-reporting the non-paged memory usage?  Doesn't non-paged memory
usage _total_ have to be less than physical memory on the system?

I don't know if there's some way this, or just a similar problem,
might be applicable to apache:

This problem occurs because the Afd.sys file may charge the quota to
one Citrix process after the Citrix process allocates the nonpaged
pool memory. Then, the quota is returned to another Citrix process
after the Citrix process frees the nonpaged pool memory. When the
nonpaged pool memory is allocated and then freed repeatedly, the quota
that is allocated for the second time is a negative number. On a
32-bit system, this negative number is interpreted as a second Citrix
process that uses 4 GB of nonpaged pool memory.
Eric Covener

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