{Dangerous Filename?} RE: MailScanner can't keep up
Julian Field
MailScanner at ecs.soton.ac.uk
Wed Feb 22 19:07:27 GMT 2006
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Chris Russell wrote:
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> Subject:
> RE: MailScanner can't keep up
> From:
> "Chris Russell" <Chris.Russell at knowledgeit.co.uk>
> Date:
> Wed, 22 Feb 2006 18:48:47 -0000
> To:
> "MailScanner discussion" <mailscanner at lists.mailscanner.info>
>
> To:
> "MailScanner discussion" <mailscanner at lists.mailscanner.info>
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>> by Postfix). On average, MailScanner is reporting
>> taking about 900 seconds per 15 message batch. I have
>> it limited to 10 child processes. The server it is
>> running on is a 3.0 Ghz with 512 Mb memory and a 40Gig
>>
>
> What is the output of top ? 512 Mb of memory is very small by modern standards and I would think your main issue is memory. MailScanner is causing the system to swap out and hence slowing things right down.
>
> I read somewhere that each child takes up 20Mb of memory, but on our systems top thinks its more like 200-300Mb each. I would guess this is dependant on SpamAssassin features being enabled etc.
>
Where did you see the 20Mb per child? I find it's more like 700/5 =
140Mb per child. Which roughly matches your measurement. I recommend 1Gb
RAM per CPU as a minimum. Anything less than that and it will start
swapping. Say goodnight to your performance at that point :-(
- --
Julian Field
www.MailScanner.info
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