Something that may be worth a try is to run the nscd daemon and leave
reverse lookups on in qpopper.
If you have connections from the same client multiple times, this will
greatly speed up the dns lookups. It should have little effect on a
new connection however.
-Adam
On 5/4/06, Brian N. Smith <brian (at mark) nuonce.net> wrote:
> To all,
>
> I have had this problem to. Yesterday I made a very small change, and I
> "think" it seems to have cleared it up some. KNOCK on wood, but I haven't
> received any Active Monitor emails about CPU Utilization, or any complaints
> at all.
>
> I know eventually it will be switched to Dovecot, but if anyone wants to try
> my "magical" fix.
>
> Edit: /etc/xinetd.d/pop3
>
> Change: server_args = in.qpopper -s
> To: server_args = in.qpopper -s -R
>
> The -R says NOT to do a reverse lookup. Like I said, remarkably it seems to
> have fixed it. I haven't seen 10-15 POP3 processes like I have been seeing.
> It seems to have made the box very happy. If someone who is having the same
> problem can try it, and let me know if I am smoking crack, or does this
> actually make a big difference?
>
> The only thing that I noticed to, is that PAM is just sometimes really slow.
> Any good how-tos on speeding it up?
>
> Thanks,
> Brian
>
>
>
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