[Dovecot] How to calculate auth_cache_size ?

[Patrick Domack]

I don't think you need to use anything very scientific. Too high  
shouldn't hurt, I don't think memory is allocated needlessly. The  
cache timeout value is probably more performance worthwile.

But to calc, I would go with about the number of logins you get per 5  
or 10min.
I would think any logins over that period of time would probably be  
the same user.

Quoting Frank Bonnet <f.bonnet at esiee.fr>:

> Hello
>
> Is there a way to calculate this parameter for my site
> which has approx 4000 users authenticating thru NIS ?
>
> Thanks a lot
>
>