Debug on a production server

[Scott Silva]

on 10/12/2007 1:21 AM Julian Field spake the following:
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> Scott Silva wrote:
>> on 10/11/2007 1:38 PM Mikael Syska spake the following:
>>> Scott Silva wrote:
>>>> on 10/11/2007 12:02 PM Mikael Syska spake the following:
>>>>> Ugo Bellavance wrote:
>>>>>> Mikael Syska wrote:
>>>>>>> Hi,
>>>>>>>>> There does not seem to be much info on this ... and my scan 
>>>>>>>>> times are also rather high ... not that its a problem atm ... 
>>>>>>>>> but it could be in the future :-(
>>>>>>>> Please provide more information:
>>>>>>>>
>>>>>>>> Hardware
>>>>>>> OS: FreeBSD 7 ( yes its current, but 6.4 did not perform very 
>>>>>>> disk with the SAS 5iR controller
>>>>>>> 2GB ram
>>>>>>> Dual Core Intel Xeon 3060 2.40 Ghz
>>>>>>>> # of child processes
>>>>>>> 8
>>>>>>>> scan times of full batches.
>>>>>>> Oct 11 18:48:58 spam02 MailScanner[72858]: Batch (15 messages) 
>>>>>>> processed in 89.57 seconds
>>>>>>> Oct 11 18:49:08 spam02 MailScanner[72872]: Batch (15 messages) 
>>>>>>> processed in 88.72 seconds
>>>>>>> Oct 11 18:49:10 spam02 MailScanner[72854]: Batch (15 messages) 
>>>>>>> processed in 106.89 seconds
>>>>>>> Oct 11 18:49:19 spam02 MailScanner[72865]: Batch (15 messages) 
>>>>>>> processed in 105.85 seconds
>>>>>> Looks fine.  Is there a reason why you use 15 message batches?
>>>>> you mean instead of 30 ....
>>>>>
>>>>> Some performance turning I read on the wiki ... but t does not seem 
>>>>> to have any effect on my system ... so it will do up to deafult again.
>>>>>>>> Using RBLs at MTA
>>>>>>> nope ... we have had very bad exprerience with that ... both 
>>>>>>> tried spamcop and spamhaus ... both have to many FP here in 
>>>>>>> denmark ....
>>>>>> Spamcop is FP-prone, but I've never heard of a FP in north america 
>>>>>> for spamhaus.
>>>>> Then you are a lucky man ...
>>>>>
>>>>> since the server aint that overloaded I dont see any reason to risk 
>>>>> getting any FP ...
>>>>>>> Its not a problem that I takes so long time .. just saw the 
>>>>>>> message about the patch and wandered if that would make a diff on 
>>>>>>> my scan times ...
>>>>>> Ok, I doubt so. Did you put the MailScanner working dir and /tmp 
>>>>>> in memory (tmpfs on linux)?
>>>>> no ... its on the disk ... and since every mail could be far too 
>>>>> important I dont intend to use it ....
>>>> Tmpfs is absolutely safe on mailscanner if you follow the wiki and 
>>>> only put the mailscanner incoming directory there. And the speed 
>>>> increase is very noticeable, especially in virus and spam scanning.
>>>> Mailscanner does not actually remove any messages. It sees the 
>>>> message in mqueue.in, extracts it to incoming, does its work, and if 
>>>> messages are clean it hard links it to mqueue and then unlinks from 
>>>> mqueue.in. So there is no chance of mailscanner losing a message. If 
>>>> it dies at any point up to the unlink, the original message is in 
>>>> mqueue.in waiting to be processed again.
>>> You mention the wiki ... I can only see 
>>> http://wiki.mailscanner.info/doku.php and a link to: 
>>> http://www.sng.ecs.soton.ac.uk/mailscanner/serve/cache/120.html witch 
>>> does not seem to work.
>>>
>>> and there does not seem to be anything about tmpfs ... if ... then 
>>> I'm not able to find it ...
>>>
>> Julian,
>> Do you have any of this old material ( like 
>> http://www.sng.ecs.soton.ac.uk/mailscanner/serve/cache/120.html) 
>> archived somewhere?
>> I would be willing to spend some time fixing this up if I had the 
>> content to put in.
>> I don't want to go from memory, as I will probably get something 
>> really wonky.
>>
> Thank you very much, it's greatly appreciated!
> The old material is now online again at
> http://www.sng.ecs.soton.ac.uk/mailscanner.archive/serve/cache/
> If you could get it added to the wiki (the useful bits, anyway :-) that 
> would be great.
> 
> Cheers,
> 
> Jules
It will take me a few weeks to go through it all and see what I can do with it.

Scott

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