Hi Daniel,

               we have about 3500 users in our AD. Openfire Server has been up for about a month, and we already see about 950 concurrent users and the number keeps growing every hour.

               We use mySQL as DB, with a pool of 500 max connections and 50 of the active all the time. Openfire is set up to use up to 758 Mb of RAM (we are going to set up a max at 1 Gb. in a few days) and the usage of this fluctuates from 50% to 98% in the course of the day.

               The server is a 2.4 Ghz Xeon, with 1.5 Gb of RAM (hopefully we will upgrade this). Both mySQL and Openfire are running on the same server.

               Let me say, it works like charm, the users connect to it nationwide with no problems and the bandwidth usage is minimalistic.

               Even the back up is easy, the DB is less than 3 Mb.

               You should try it yourself, this guys have desinged a great hell of a system.

Hope this is usefull,

Joaquin