A quick and easy performance improvement

[Richard Lynch]

What about using tmpfs instead of a ramdisk for bayes's DB?  The problem 
I have with a ramdisk is that you're giving up real memory for it.  In 
my case that would be about 1.5GB.  That's a lot to give up.  With tmpfs 
it would be in virtual memory and grow or shrink as needed (using the 
swap file).  That wouldn't be as good as a ramdisk in term of 
performance but it would be more flexible.  Has anyone done that?  How 
did it work out?

~rich

Green, Rodney wrote:
> Here's a link to a howto on creating a ramdisk...
>
> http://www.vanemery.com/Linux/Ramdisk/ramdisk.html
>
> Chris Hammond wrote:
>> Thanks Daniel, it does sound quite simple.  I will look at trying this.
>>
>> Thanks
>> Chris
>>  
>>  
>>>>> "Daniel Maher" <daniel.maher at ubisoft.com> 08/01/06 9:43 AM >>> 
>>>>>         
>> Sure, it's actually quite simple.
>>
>> I just created a ramdisk in the standard way, and mounted it as
>> /var/spool/MailScanner/incoming
>>
>> I then created a simple cronjob that runs every couple of hours, which
>> runs sa- learn -- sync, and then copies the
>> /var/spool/MailScanner/incoming/bayes/* to a directory on a physical
>> disk.
>>
>> I should point out that the contents of /bayes/ is around 500MB to
>> 600MB on each of the servers in my mail pool, so the more RAM the
>> better. :)
>>
>> -- 
>>   _
>>  °v°  Daniel Maher
>> /(_)\ Administrateur Système Unix
>>  ^ ^  Unix System Administrator
>>  
>> Sentio aliquos togatos contra me conspirare.
>>  
>>> ----- Original Message-----
>>> From: mailscanner- bounces at lists.mailscanner.info
>>>     
>> [mailto:mailscanner-
>>  
>>> bounces at lists.mailscanner.info] On Behalf Of Chris Hammond
>>> Sent: August 1, 2006 9:14 AM
>>> To: MailScanner discussion
>>> Subject: Re: A quick and easy performance improvement
>>>
>>> Daniel, would you share how you setup yours?
>>>
>>> Thanks
>>> Chris
>>>     
>>
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>>   
>


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