By "under load" I mean continually applying more and more load until some manner of reactionary behavior is recognizable in various parts of the system. This is always what I mean when I refer to testing something under load, because as you know there is no one metric that describes "load" for all systems and applications.
My point is that during the load test you may see one or more performance metrics on one or more parts of the system have a marked non-linear reaction to a gradual linear increase in load, and both the amount of load at which this happens and the degree of non-linearity that is exhibited will indicate how scalable the system as a whole is under the current configuration. I believe that you could follow the queue of performance bottlenecks and tune each one to the point of diminishing returns, and you would still see the same type of behavior because, under stress, the extra work needed to *display* large images (or a large number of small images) from the database will always cause this behavior. My preference would be to eliminate this problem from the design by writing the images to disk and then just let IIS serve those image files directly. Respectfully, Adam Phillip Churvis Certified Advanced ColdFusion MX 7 Developer BlueDragon Alliance Founding Committee Get advanced intensive Master-level training in C# & ASP.NET 2.0 for ColdFusion Developers at ProductivityEnhancement.com ----- Original Message ----- From: Adam Haskell To: CF-Community Sent: Monday, February 19, 2007 11:01 PM Subject: Re: Storing images in DB. What constitutes underload? I see this (or other abstract, vague terms) constantly in the community and I think vague words like this can cause confusion and may lead someone down a path without true understanding. Your idea of under load may be *very* different than another's. In our environment (Enterprise Intranet Systems for our 2500+ stores) under load, or heavy load, may be 100 requests per second. In the ecommerce company (<$5 mill/year) 20 requests per second was under load. So what exactly is the definition of under load? Adam Haskell On 2/19/07, Adam Churvis <[EMAIL PROTECTED]> wrote: > > Nick, > > Have you ever tried this *under load* with either a large number of images ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Macromedia ColdFusion MX7 Upgrade to MX7 & experience time-saving features, more productivity. http://www.adobe.com/products/coldfusion Archive: http://www.houseoffusion.com/groups/CF-Community/message.cfm/messageid:228394 Subscription: http://www.houseoffusion.com/groups/CF-Community/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.5
