MS Hanging

[Scott Silva]

UxBoD spake the following on 8/1/2007 1:27 PM:
> Today, our secondary MX, was hit by a large SPAM storm. The message subject was all the same so I presume a new set of bots was unleashed.
> 
> Anyway, I saw the inbound queue jump up to 1000, and MailScanner stop logging anything too /var/log/maillog.  I reloaded MS and it began to process again.  After getting through ~ 250 messages it started building up again.  I checked running processes and all the MS processes were running, but they all said Checking SPAM lists.
> 
> My settings are the same on both primary and secondary, the only difference being hardware processing power.
> 
> Primary is a dual Opteron 8GB RAM, children set @ 20 with a 100 message batch size and all okay.  Secondary is single P4 with 1GB RAM, children set @ 5 with a 25 message batch size.
> 
> Has anybody seen this before?  We have ordered a matching server to replace the secondary but that is on a two week lead time.  Any ideas?
> 
> I will run a strace tomorrow if it happens again to see where it is sticking.
> 
> Regards,
> 
Are you running any optimizations on the servers, like dnsbl's on the MTA or
greylisting? Anything that might stop stuff before it gets to the queue will
benefit you.


-- 

MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!