Question

I wonder if this is a good solution for a medium size social site. Its about managing online/offline indications of users. My solution is to include a script on each page that first of all updates the “last activity” field of the current user with a timestamp, then i select all users that havent been active within the session expire time(but is still online accordingly to the table) and sets the online flag(in db) to false. Is this a solution that is commonly used or will the sever load be to much when a bigger amount of users are navigating throug the site? Is there any better solution? Be aware that im not only intrested in the amount of online users but also names, therefore a session based script seems to complicated and inaccurate.

Thanks in advance!

Answer 1

It is good enough but better you could store this information in activity table: for any active user insert/update a row with his user_id and for inactive for more than N minutes one – remove rows.