I've done some debugging on this now, and each request is checking for
roughly 21 files to see if they exist (which they don't). The path
exists, but the file doesn't.
I did a test and found 21 fileexists(expandpath(..)) checks to
different files that don't exist takes around 150ms, quite a bit for
each page request, but not something I would have thought that would
show up so frequently in the thread dumps.

are there operating system file I/O limits? I've got no idea when it
comes to operating system I/O level performance, if two requests check
to see if a file exists at the same time, does one have to wait for
the other to finish?

Barry.

On May 19, 3:38 pm, "charlie arehart" <charlie_li...@carehart.org>
wrote:
> Hmm....so, given that you've now told us that the line 424 that's always 
> showing up is
> doing a filexists(expandpath()), doesn't it seem that this is at the root of 
> the
> problem? Have you done some debugging to see what the path is that it's 
> expanding?
> Maybe it's on some drive that's not giving a quick response? Maybe it's even 
> on a
> network/UNC path or mapped drive, that involves some network I/O?
>
> /charlie
>
>
>
> > -----Original Message-----
> > From: cfaussie@googlegroups.com [mailto:cfaus...@googlegroups.com] On 
> > Behalf Of
> > BarryC
> > Sent: Tuesday, May 18, 2010 10:25 PM
> > To: cfaussie
> > Subject: [cfaussie] Re: Coldfusion 9 and Windows server 2008 64bit
>
> > I measure the performance with a load test using 'Paessler web stress
> > tool 7' and note the average time of requests over a certain period
> > against a set of URL's.
> > The pages i'm running at the moment all do a similar thing and are
> > built pretty much the same way but with different content come from
> > the database, so it's mostly repetitive work for the system.
>
> > I have enabled the trusted cache and done some tests and there is
> > certainly an improvement - mostly as the testing goes on and re-uses
>
> <snip>
>
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