Hi, i'm running qpopper 4.0.5 on linux (2.4.x) with maildir patch (0.12) and pam_radius for authentication.
right now, i'm suffering from high cpu load averages once it's gets too busy the load will skyrocket to abnormal high values and the service will become unavailable untill it's restarted. this typically happens during peak times when we receive 15 pop sessions/sec. at first it thought it was radius related because i'm seeing the following error message during the peak times: Jan 19 14:07:41 xxx popper[13404]: pam_radius_auth: RADIUS server x.x.x.x failed to respond but even with a more performant radius, the problem persists, it looks like the radius errors are a consequence of the problem and not the real cause. everything is pointing in the direction of the amount of pop sessions whenever you get to the 13-14pops/sec barrier, qpopper seems to be giving up. it's not traffic related because the amount of traffic is higher outside the peak hours. i've seen posts of people suffering from the same problem, but i didn't find any solutions up untill now, any hints are appreciated. bart --
