MailScanner slow and not taking all resources available

Ugo Bellavance ugob at
Fri Dec 8 17:00:07 GMT 2006

Martin Hepworth wrote:
> Ugo Bellavance wrote:
>> Hi,
>> This is MailScanner version 4.54.6
>> It sometimes happen on some servers (not always the same) that 
>> suddenly, the INQ grows very fast.  When I look at the server, CPU is 
>> used only at ~ 50% or less and MailScanner is not using the CPU that 
>> much.
>> - The networks seems to be ok (I can easily download a file at 1 MB/s 
>> (10mbps link).
>> - DNS resolution seems to be quick
>> - SA doesn't time out
>> - System doesn't swap
>> - disk i/o doesn't look saturated


>> Anyone seeing this as well?
> Ugo
> If it was anyone else I'd be asking if you'd done the performane tuning 
> stuff on the wiki.
> There is some odd stuff going on with the dnsrbl at the moment. People 
> on the nanog list are commenting on this.
> Dunno is there is some other DDOS attacks going but also opendns are 
> under attack right now. Might be worth looking at which DNS/RBL's you 
> are using on this and seeing if you can work around of locally mirror RBLs.

It has now come back to normal... network congestion I think.



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