On 11/24/2014 11:22 AM, Robert Moskowitz wrote:
On 11/24/2014 02:23 AM, Gordan Bobic wrote:
On 11/24/2014 01:28 AM, Robert Moskowitz wrote:
So I have my mailserver running with the full suite of software on
RSEL6:
Postfix/mysql/dovecot/roundcube/spamassasin/clamav/amavis-new
Quite a mouth full, and I see it in lost connections:
1035 *Warning: Pre-queue content-filter connection overload
That is a lot! So there is supposedly some tuning that might help:
http://blog.laimbock.com/2013/07/09/postfix-pre-queue-content-filter-connection-overload/
Or I just put up with this. It will get worst as spammers redirect here
from the old mailserver that I just turned off last night (an i386 box
that has been running for 4 years).
BTW, I am working up a blog posting on how to build this...
I cannot say I am too surprised you are having overload issues at
times if you are running spamassassin on a Pi.
Not a Pi (armv5), but a Cubietruck (armv7 duo core, 2Gb memory).
R-Pi is ARMv6.
Dual core ARM and 2GB of RAM could still construed to be pushing it with
something that is as much of a resource hog as spamassassin, especially
if you get a lot of mail, spam or otherwise.
It isn't exactly lightweight. That's why I am sticking with only
nolisting and clam and uri milters without spamassassin.
It might also be worth checking what your disk I/O and swapping are
like, since on a Pi clamd alone will be eating about 1/2 of the RAM.
# free
total used free shared buffers cached
Mem: 2050624 1584976 465648 360 265588 761744
-/+ buffers/cache: 557644 1492980
Swap: 4193276 1276 4192000
How can I get a measure of disk I/O?
iostat -x 1
If you are seeing the %util abouve 80% you are probably bottlenecked on
disk I/O.
iotop might also help.
That should be quite high for all
the mail writing/reading. Also there is the mysql I/O. tables are
small, but there are a number of them.
How big are we talking about WRT MySQL?
Gordan
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