After switching from tcp to unix socket, postfix as milter client is 
fast like a rocket (less than a second).

Just wondering which tcp parameter causes the long delay


Matthias Schneider



Am 19.08.19 um 10:34 schrieb Matthias Schneider:
> Chris, can you tell me your postfix version/settings?
>
> When i do a load-test on my milter application, i can also get 100mb 
> in about a second proceesed (with 65535 sized chunks).
>
> But postfix (3.3.0 and 3.4.5) only sends about 24 body chunks per 
> second to my milter application. Its the only milter configured and 
> the milter is running on 
> https://protection.retarus.com/v1?u=127.0.0.1&c=3ii9Gwp&r=3FiFpNbrhgwKRK1FMoFWR1&k=7s1&s=2xmP97Jog50dON88kIi5CzD5MGfUsDQvVF2HIwJfHq4 
> (so no latency issues)
>
> Matthias
>
>
>
>
> Am 16.08.19 um 18:06 schrieb Chris Wedgwood:
>>> Postfix with default milter body chunk size 65535:
>>>
>>> mail processing time 1m30.154298259s
>>>
>>> Postfix with milter body chunk size 1048576:
>>>
>>> mail processing time 17.52360866s
>> it looks to me like postfix is able to feed a milter very quickly
>>
>> i just did a couple of quick tests here, an ~83 MiB message only takes
>> a second or two to pass through two milters (debug log shows 1360 64K
>> fragments and one smaller tail fragment)