Hello Adam,
there should be a named running anyway!!!!!!!!!!!!
Of course named is cacheing!!!!
But - of course - you need to ask your own named.
So resolv.conf should direct to
127.0.0.1
No further use in a cache daemon!
It is just a fact, that there are very many lame nameservers out
there.
Therefore, reverse namelookups are potentially extremely slow and therefore there
exists an option to switch them off.
The point is: do you want the (reverse) name in the logs rather
than the ip address?
I alway have the reverse name lookups switched off.
If I'm keen to know the reverse name I can look it up later.
qpopper just waits for the name lookup before it can do the log entry.
Chris
Thursday, May 4, 2006, 4:04:35 PM, you wrote:
AC> Something that may be worth a try is to run the nscd daemon and leave
AC> reverse lookups on in qpopper.
AC> If you have connections from the same client multiple times, this will
AC> greatly speed up the dns lookups. It should have little effect on a
AC> new connection however.
AC> -Adam
AC> 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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