Yep yep..
sessions kill servers under load..
200 users on the forum at once is a lot though.. (That is a pretty popular forum)
You don't need to track anonymous users.. So that cuts 1/4th of them usually..
And if you use sessions to only track users who have cookies disabled I think it would work great.. You would only have maybe 1 or 2 users online who are being tracked by sessions..
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Jeremy 'PeelBoy' Amberg