Re: need to limit or disable files being retained in memory or cache

From: David Candy (david_at_mvps.org)
Date: 09/03/04 

Date: Sat, 4 Sep 2004 02:08:50 +1000

I don't see any problem. What do you care if it's cached or not? There isn't enough data. Copy a 50 meg file takes 6 secs the first time and 5 the second.

But if it is cached (and how big - if't it's too big it won't cache as the end over writes the beginning) so what? What business of yours is it how MS implements their operating system.

Perhaps you should stick to medical things.

The Problem. My bones are made out of calcium. I don't like milk (disgusting fat laden stuff). Therefore I want my body to not store fat. Your suggestion?

Or don't use windows. Try a Mac.

Or state what your problem is. Lots of background but no problem. 

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"Cyndee" <anonymous@discussions.microsoft.com> wrote in message news:0aa801c491cc$749fc480$a401280a@phx.gbl...
> I have two laptops (Compaq presario 1500, Dell Inspiron 
> 1100 - both Pentium 4, both 2 GHz +, both have 512 mb 
> memory)  The purpose of these laptops is to use in a 
> medical neurosurgery clinic to view patient CT scans while 
> the patient is there (supplaments - negative type films)
> 
> The problem - 
> The CT scans come on a disk from another hospital.  The 
> disk contains a viewing program (I do not want to mention 
> the name).  The viewing program loads in a browser window 
> and gives the user an option to view images.  At that 
> point, there are usually several directories.  I have been 
> choosing the one with the most images (200 +) for my 
> testing.  The images take a fairly long time to load 1 - 3 
> minutes. Understanding that the DVD/CD rom is the 
> bottleneck, through tweaking of the system - I have been 
> able to reduce the load of a 220 image file from 3 mins to 
> 1min 15 secs (on both machines).  
> 
> As each CD is loaded, the images are being retained and 
> not released. In my testing I noticed that if I load the 
> CD images, shut the program down but not the computer, 
> reinsert the CD, the images will load in about 2 secs or 
> less.  That tells me that they are in memory somewhere.  
> (If I turn the computer all the way off, they have to 
> reload from scratch again).  I called the viewer vendor 
> who told me that they purge their images when the program 
> is shut down.  That may be but something is keeping them 
> either in memory or in cache.  They said that Windows XP 
> was doing it.  I don't know how to prove or disprove that 
> but it doesn't matter because my relationship with the 
> vendor is indirect and I really don't have the right to 
> make any kind of demand at all.  
> 
> Here is what I would like to do if possible. When the CD 
> loads, I don't want the images to be cached at all.  The 
> doctor is going to look at the scans only when the patient 
> is there and will not look at the same scans in that 
> clinic again.  
> 
> What I have done in my previous tweaking was to disable 
> everything in the startup window and most everything in 
> the services window.  I adjusted the performance for best 
> performance which eliminated all of the check boxes in 
> that window.  The processor scheduling is for programs and 
> so is the memory useage.  Those changes seemed to allow me 
> to reduce the load time.  Now, I have changed the page 
> size from the recommended 766 mb to 2048 with a maximum of 
> 4096 in hopes that it will buy enough space to let them 
> get through an entire clinic.  I plan to buy more memory 
> to double the size but I really wanted to see if my new 
> changes would help  
> 
> And of course, if I could prevent these images from being 
> cached in the first place, that would solve the problem 
> altogether - I think.
> 
> Any advice from anyone?

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