Re: mail log question

[Markus Schönhaber <debian-user@list-post.mks-mail.de>]

12.09.25, 15:50 +0200, Vincent Lefevre:

> On 2025-09-12 14:22:34 +0200, Markus Schönhaber wrote:
>> If you just want to see all "mail-related" messages with journalctl, you
>> can use
>>
>> $ journalctl --facility mail
> 
> Indeed, thanks a lot!
> 
>> That doesn't help with journalctl's slowness if the journal has grown
>> big, of course.
> 
> It actually helps *very much*.
> 
> joooj% time journalctl -b --facility mail > /dev/null
> journalctl -b --facility mail > /dev/null  1.24s user 0.13s system 84% cpu 1.616 total
> joooj% time journalctl -b -u postfix\* > /dev/null
> journalctl -b -u postfix\* > /dev/null  3.79s user 28.51s system 26% cpu 2:02.46 total
> 
> So "--facility mail" is here 75 times as fast as "-u postfix\*".

Good to know - and thanks for measuring!

I remembered differently. And since I tend to make sure that the journal
doesn't grow too big nowadays, I didn't expect a noticeable difference
on my machines. Should have checked before presenting something as a
fact, though...

-- 
Regards
  mks