[Rspamd-Users] Custom ratelimit: leaking too fast

[Vsevolod Stakhov]

On 03/07/2024 14:43, Thomas Klaube via Users wrote:
> Hi there,
> 
> I have a custom ratelimit with a burst of 1000 and a leak of 0.035 (~2 per Minute
> or ~3000 per day) which is returning the correct ratelimit string.
> However, the bucket seemed to be leaking too fast, so I enabled debug logging
> for ratelimits (sorry for the long lines):
> 
> 2024-07-03 15:11:30 #134152(normal) <a16798>; ratelimit; ratelimit.lua:489: got reply for limit rs_customrl_user at example.org (1000 / 0.035); 13.693034775 burst, 3.3898:10.1221 dyn, 0.022779456 leaked
> 2024-07-03 15:11:30 #134152(normal) <d2b9c0>; ratelimit; ratelimit.lua:489: got reply for limit rs_customrl_user at example.org (1000 / 0.035); 14.670627313 burst, 3.4236:10.1221 dyn, 0.022407462 leaked
> 2024-07-03 15:11:30 #134152(normal) <cf8555>; ratelimit; ratelimit.lua:489: got reply for limit rs_customrl_user at example.org (1000 / 0.035); 15.647632943 burst, 3.4578:10.1221 dyn, 0.02299437 leaked
> 2024-07-03 15:12:27 #134152(normal) <ad7629>; ratelimit; ratelimit.lua:489: got reply for limit rs_customrl_user at example.org (1000 / 0.035); 9.70665177 burst, 3.4923:10.1221 dyn, 6.940981173 leaked
> 
> In the last line it is stated, that 6.94 items were leaked in 57 seconds (calculated
> from the timestamp of the last 2 lines). But my calculation says:
> 
> 57 * 0.035 = 1.995
> 
> I can't find a good explanation for this behavior and I have the feeling, that
> I am missing something...

Yes, dyn.