[Mimedefang] Greylisting DB Problem

[kamal]

Same problem here. This happens because of concurrency. I wrote a test
program for two cases, with all the triplets being new and unique
1. 10000 mail delivery attempts, sequential, one after the other. Works
fine.
2. Five threads, each doing 2000 mail delivery attempts. A new
connection is established for each mail delivery attempt. In this case,
database stops to grow after a short time.
I couldn't figure out what is the problem, instead switched to
relaydelay implementation by Evan Harris.

Hammond, Alan wrote:
> I recently attempted to implement greylisting using pieces of code 
> posted by Jonas Eckerman and David Skoll. On the initial test the 
> database appeared to grow normally as new entries were added until 
> it reached a size of just over 5 Megs (3 days) at which point it 
> stopped growing and based on the log files new entries were not being 
> successfully added to the database.  On the second and third test the 
> database grew to a size of 1.3 Megs (1 day) where the same problem 
> occurred. My system is RH9 with 1 Gig of RAM using Mimedefang 2.39.
> 
> Any suggestions on what might be the cause or what I can look at to resolve
> this would be appreciated.
> 
> Alan Hammond
> Clackamas County Network Engineer