Thanks for the update. I don't know the answer to your question, but I'll share a thought: you mention that you're load testing stuff. Is that perchance on a local development box? If so, is it perhaps some trial or lower-end version of Win2k8? I just ask because I know that in past Windows OS's, the lower-end versions did often have limits built-in, especially (as many will have noticed) the number of simultaneous IIS requests that are processed (others are queued).
It may well be that there could in fact be some I/O-level restrictions on too many requests at once, which could be queued. That's a total guess and could be way off base. Also, you may well be running an Enterprise or other high-end version of Windows 2008. Just thought I'd ask, since you're raising the concern. Now, all that said, is this 150ms the sum of the delay that you've been concerned about? If so, then it would seem at least that you've found your root cause problem, right? That's at least a step in the right direction and allows you to focus solely on this one "last mile". /charlie > -----Original Message----- > From: cfaussie@googlegroups.com [mailto:cfaus...@googlegroups.com] On Behalf > Of > BarryC > Sent: Wednesday, May 19, 2010 6:45 PM > To: cfaussie > Subject: [cfaussie] Re: Coldfusion 9 and Windows server 2008 64bit > > 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. > -- You received this message because you are subscribed to the Google Groups "cfaussie" group. To post to this group, send email to cfaus...@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
