How often need bayes to be rebuild

[Scott Silva]

Joakim Cefalk spake the following on 2/26/2007 3:17 PM:
> Do i need to rebuild my bayes db? Becuse after my rebuild a lot of spam
> are passing thru. I have restored the bayes db from the backup again.
> 
> Scott Silva skrev:
>> Joakim Cefalk spake the following on 2/26/2007 12:29 PM:
>>   
>>> What settings should i change more then Rebuild Bayes Every.
>>>
>>> Scott Silva skrev:
>>>     
>>>> Joakim Cefalk spake the following on 2/26/2007 4:39 AM:
>>>>  
>>>>       
>>>>> Hello!
>>>>>
>>>>> I have not rebuild my bayes db since i started to using it in 2005. I
>>>>> have only 200 messages a day, about 30% i high scoring spam and 5-10%
>>>>> low scoring.
>>>>> What should i set my "Rebuild Bayes Every" to?  I'm using MySQL as
>>>>> storage for the bayes db.
>>>>>
>>>>> Joakim
>>>>>
>>>>>     
>>>>>         
>>>> I rebuild daily, and it only takes a minute or so.
>>>>
>>>>   
>>>>       
>> If you have never done a bayes rebuild, I would recommend you do a manual
>> rebuild first. (sa-learn --force-expire)
>> Then the following is what I have for a daily run;
>>
>> # If you are using the Bayesian statistics engine on a busy server,
>> # you may well need to force a Bayesian database rebuild and expiry
>> # at regular intervals. This is measures in seconds.
>> # 1 day = 86400 seconds.
>> # To disable this feature set this to 0.
>> # Note: If you enable this feature, set "bayes_auto_expire 0" in
>> #       spam.assasssin.prefs.conf which you will find in the same
>> #       directory as this file.
>> Rebuild Bayes Every = 86400
>>
>> # The Bayesian database rebuild and expiry may take a 2 or 3 minutes
>> # to complete. During this time you can either wait, or simply
>> # disable SpamAssassin checks until it has completed.
>> Wait During Bayes Rebuild = yes
>>
>>
>> I would recommend that you set "wait during bayes rebuild = yes"
>> so the expiry runs don't get killed by spamassassin accessing the bayes db.
>>
>>   
A rebuild is only supposed to clean up old and expired entries. It shouldn't
affect scoring. Your bayes might have been auto-rebuilding anyway, because I
think that is the default in the newer spamassassins.

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