Cody Baker wrote:
A year and a half ago we put two qmail-scanner machines in our lineup, handling around 100,000 messages per day. The second was mainly for redundancy. We're now netting on average 400,000 messages per day and our two machines are just barely hanging on for the ride. We've got new hardware on order to remedy our situation, but my question are: What kind of mileage are you seeing out of your servers? Does anyone have any tips for squeaking any more performance out of qmail-scanner/clamd?The only thing I can suggest is what I did. My server was pushing about 48,000 emails a day, of which only about 1 in 20 was actually aimed towards a real user. This meant that I was running SpamAssassin/ClamAV/qmail-scanner on 19 out of 20 emails that I didn't need to.
I ended up adding the ClamAV patch, as well as the spamcop RBL , and dropped everything - now I'm using slightly more cpu at the qmail-smtpd, but I'm using a lot less memory/processor once inside.
In the last 6 hours (originally 12,000 connections to send emails), spamcop's rbl has blocked 2,800 connection attempts.
Does anyone have any experience with:
- precompiling qmail-scanner - I've seen a little information about this, but nothing that doesn't have HUGE warnings about being experimental.
None
- Memory File System - I've done this before, but never with QS, would it be worth my file to do this for /var/spool/qmailscanner/working? In theory it sounds good, but is this something that's duplicating the caching the operating system is already doing? - clamd - Right now we're set up with very thorough scanning, is there any magic which can lighten the load on clamd.Not that I know of. I think Clam is just clam - and the newer versions are heavier on memory usage than the old.
We're using FreeBSD 5.3 on these servers, relatively average hard drives, and 2G of memory. The new servers will be P4 3.2's and the old ones are Duron 1200's.My server is an AMD 2800, 1 gig of ram. 40 gb hard drive. Original system was AMD 1200 with 1 gig of ram. Similar performance email-wise.
BW
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