>>>(Slide 16) >>>- "-n 5" is probably low for a reasonably high traffic site. >>I've got about 200 users, if there should be more threads will >>authentication fail or just be really slow? >Authentication will start to fail (atleast when using unix domain >sockets), because the saslauthd listen queue will fill up. I don't >believe the doors IPC mechanism has this problem, since it allocates >threads dynamicly (though you need to be on Solaris). >Though, with only 200 users I doubt you have much to worry about unless >they all decide to log in at once, in which case you'll crush the machine >just fork()ing that much. A good guess for the number of threads you want >is about 1.5 x the average number of connections you see in a second, >which errs slightly on the high side.
Ok, I'll toss the 1.5 rule on the new performance slide. On another performance note; is it safe to do noatime on the mail filesystem and/or configuration filesystem? Or does cyrus make use of these attributes?
