> Our web server is a P3 500 with 512KB RAM running WIN2K/ IIS > & CF 4.5.1 our DB server is also a P3 500 with 512KB RAM > running WIN2K and SQL SERVER 2000. I've read the rule of > thumb for the limit simultaneous requests should be 2x or 3x > the number of processors on the box, as we have 1 processor > on our web server does this mean our setting should be only > 2 simultaneous requests??? This seems frighteningly low to > me!! currently we have it set to 15. - am I missing > something here ?
Unfortunately, the "rule of thumb" is pretty close to worthless. As Mike Brunt mentioned, MM's more recent "rule of thumb" was to set it to three to five times the number of processors. In either case, these rules aren't very useful. There's actually some funny history behind this - for a long time, that setting has been exposed in CF, but if you asked ten people at Allaire what you should put in there (as I did), you'd get ten different answers! The reason for this is that there are simply too many variables that will affect this value - the algorithm is sufficiently complex that no one's discovered it. So, the way to find out the appropriate setting for your server is to run a series of load tests on your server, against your applications (assuming you've already optimized those applications, of course). Figuring out the optimal value for this setting can make a huge performance difference - in many cases, more than any other single performance change you can make! Macromedia used to offer a course that covered performance tuning through load testing, but they no longer offer the course. That's a shame, because it was a good course, but they never got enough students for it. Fig Leaf still offers the course on an irregular basis - if we get enough people interested, in one place at one time, we can do it. > Also we have our server settings to restart after 10 > unresponsive requests - any suggestions? Are you seeing lots of server restarts? If not, don't worry about this. If so, you probably want to find out which scripts are killing your server. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ voice: (202) 797-5496 fax: (202) 797-5444 ______________________________________________________________________ This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting. FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
