Re: [AMaViS-user] Why SA is so slow with this rules?

[Jean D. <am...@dr...>]

Mark Martinec wrote :

>Jean,
>
>  
>
>>I'm making bench with amavisd 2.2.1 and SA 3.0.2 on postfix 2.1.5.
>>It runs on a dual xeon 2.8 with 2GB of ram with a redhat 3
>>(2.4.21-15.0.4.ELsmp)
>>... Bayes is in mysql and so are policies
>>I use ramdisk for the tmp directory
>>I've set LANG=C LC_ALL=C
>>$max_servers = 7; $max_requests  = 30;
>>    
>>
>
>  
>
>>I have this perfs With SA:
>>1.9 msg / sec : with default rules + 70_sare_adult.cf 70_sare_oem.cf
>>                                                         70_sare_random.cf
>>3.0 msg / sec : with default rules
>>4.5 msg / sec : default rules without 20_drugs.cf and 20_phrases.cf
>>
>>What could I make to have best perfs with SA's default rules + this 3
>>sare's rules?
>>
>>I think that with 2 cpu and 2 GB of ram, the perfs should be better.
>>    
>>
>
>You may experiment with finding the optimum $max_servers for a particular
>combination of rules and selected network tests, although I think you are
>already close to it and seems you know how to go about pretty well.
>You may skim through http://www.ijs.si/software/amavisd/README.performance
>just in case (like turning off syncing on syslog file, if running on Linux).
>
>Perhaps people on the SA list might know which rulesets are
>too CPU expensive for the benefit they bring.
>
>  Mark
>
>  
>
Here is an answer off the utility of these sare rules that I had on 
SA-user maillist

>70_sare_random.cf shouldn't have any significant impact. Those tests
>are real simple and efficient.

>70_sare_adult.cf contains a lot of obfuscation tests, but they're
>among the most efficient of that type.

>There's also a lot of obfuscation testing in 70_sare_oem.cf, some of
>it not quite so efficient (some testing of \s* between words), but
>nothing horrendous.

>There's nothing in those rules that should cause a 50% drop in
>efficiency.



In my config, changing $max_servers doesn't make realy change in term of speed.
The load average is near 7, no swap is use. Iowait<1

I Think my syslog is ok. I've added - before each file path.

Where I run amavisd in debug mod (with $sa_debug=1) I see that logs block on the console (just a litte time and restart) on this line : 
debug: running body-text per-line regexp tests; score so far=-1.96

As I work on a redhat, Is it possible that it's still an UTF-8 problem? (I've also change LANG in /etc/sysconfig/i18n and reboot)

I'm going to run an iconv on SA rules (I think that there is a charset problem on the disk)
Do you think it could speed up SA? (Actually :  SA check: 9365ms, SA check: 9706ms, SA check: 7256ms...)


Thanks for your help.

Jean Deram