Weblogic capacity sizing

Question

Hi

Please can anyone suggest.We are trying to estimate how manay managed server instances are required in a weblogic domain and how many servers would we need as well. Our estimate is that on there will be 10,000 concurrent users(doesn't include logged in users) for the application and about 400 transactions per second and each http session will carry around 40kB data..

1. How many managed servers would we ideally need ?
2. How many windows vm's & cpu's would we need ideally.Each windows vm has memory of 4gb
3. We are planning to allocate atleast 1 Gb memory to each managed server. the weblogic environment will be on virtualisation farm with each vm having around 5GB memory..

Many thanks

Answer 1

Any thoughts on this please I'm trying to figure out how many managed servers we would need.The environment is based on windows 2003 VM's with each VM hving 4gb memory and 20 GB hd space.Following are the volumetrics

Concurrent users (peak time) - 20000 Transactions/second - 400 /second (some of which are database reads as well) application type : stateless time taken by each transaction - 2 -3 seconds approx.