web application monitoring

i'm currently searching for a way to monitor my web application so that I could make a baseline for server capacity plan for the future based on this information.

Is there a way to get the number of hits, unique users, active users, total bytes request(bytes/sec).Is there a tool i can use.or should i develop my own app for this.?

Please give advice what i really wanted to achieve right now is to monitor
the server usage and web traffic.

with local intranet 10mbps connection and
thru leased lined using 1mbps connection.

TIA

Your host might provide this data.

If not, you need a third party app that you can "plug in"

Depending on what specific info you are looking for, something like "BrowserHawk" might help you out.

Others exist too.

I'm hosting my own intranet site for now and a posibility of expanding it to other facilities using e1 leased line.I currently need to monitor the usage so i could plan for the future using the logs i've monitored.stuff like that.