I'd say even knowing some of the variables, until you actually apply the load test, you can't be totally sure about how this 50% * 25 users will translate to 500 users. Were pages cached? How long did the test last? What types of actions were being tested? How frequently were the virtual users requesting pages?
I could formulate a 10 user test updating/inserting/doing heavy lifting with 1 second pauses between each request that will totally consume the entire processor. Of course this doesn't represent any real world scenario for any project I've worked on (people can't type that fast). You could also formulate a 500 user test where most requests are just caches pageviews and a more realistic 5-15 second pause is taken between each request and the server may hardly break a sweat. Load tests are tricky to setup, and to get it right you have to very carefully plan them so that they mimic the actual user behavior patterns for the software. Jeff, I don't know what software you are testing, but if it's a licensed shrinkwrapped product you may want to try to get ahold of some web server logs from one of their other customers, or from the company who makes the software so that you can get a better understanding of what actual user behavior patterns are without having to guess and make shizit up. Some load testing software will actually read the web server logs directly and generate your load testing scripts for you, otherwise, run them through your favorite analyzer and use those stats... Lastly, check out LoRCAT http://www.productivityenhancement.com/products.cfm when/if it comes time to speed the application up. I've not had an opportunity to try it out yet, but if it does what it says it does, it will likely be invaluable to your goal of 500 users... -Cameron ----------------- Cameron Childress Sumo Consulting Inc. --- cell: 678-637-5072 aim: cameroncf email: [EMAIL PROTECTED] > -----Original Message----- > From: Jeffry Houser [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, September 17, 2002 8:26 AM > To: CF-Server > Subject: RE: During Load Testing the Server goes to 50% load.. is that > odd? > > > Windows NT 4 ( I believe they said Service Pack 6a ) and running on > ColdFusion 5. > > Beyond that, I'm not really sure. > > At 12:37 AM 9/17/2002 -0400, you wrote: > >What are the details? > >OS? CF version? > > > >You cannot comment on anything without knowing the variables... > > > >Joe > > > > > -----Original Message----- > > > From: Jeffry Houser [mailto:[EMAIL PROTECTED]] > > > Sent: Monday, September 16, 2002 7:15 PM > > > To: CF-Server > > > Subject: During Load Testing the Server goes to 50% load.. is > that odd? > > > > > > > > > I have a ( potential ) client who approached me with a problem. > > > > > > They have been doing some preliminary load testing of an > > > application with > > > 25 users (I.E. a demo license of a program ) and have noticed that the > > > processor utilization was taking 50% of resources. They want the > > > application to work ( without sweating ) for up to 500 users. > They are a > > > bit worried. > > > > > > This is where I come in and I'm preparing a proposal for load > > > testing and > > > optimizing their application / server. The server sounds pretty beefy > > > (I.E. dual 1 GHZ processors and 2 gigs of RAM ). I haven't dealt > > > with the > > > server processor utilization / memory allocation too much. > Is what they > > > are experiencing common? What utilization should they expect > > > with a small > > > number of users? > > > > > > > > > -- > > > Jeffry Houser | mailto:[EMAIL PROTECTED] > > > Need a Web Developer? Contact me! > > > AIM: Reboog711 | Phone: 1-203-379-0773 > > > -- > > > My CFMX Book: > > > <http://www.amazon.com/exec/obidos/ASIN/0072225564/instantcoldfu-20> > > > My Books: http://www.instantcoldfusion.com > > > My Band: http://www.farcryfly.com > > > > > > > > > ______________________________________________________________________ Your ad could be here. Monies from ads go to support these lists and provide more resources for the community. http://www.fusionauthority.com/ads.cfm ------------------------------------------------------------------------------ To unsubscribe, send a message to [EMAIL PROTECTED] with 'unsubscribe' in the body or visit the list page at www.houseoffusion.com
