[SAC] Mailman Postfix tuning - Urgent

[Jeff McKenna]

Thanks for your work on this Alex.

-Jeff

On Apr 18, 2014 10:03 PM, Alex Mandel <tech_dev at wildintellect.com> wrote:
>
> Disk rebuild on osgeo4 is taking longer than expected. Not sure why, but 
> even with all the VMs off it was going at 2%/hour. 
>
> After a couple of hours I turned on Mail so that we wouldn't impact the 
> mailing lists for too long. The problem here is that Mail is the biggest 
> i/o user on osgeo4. 
>
> Poking around and reading up, I think there are some things that can be 
> done to make Mail behave better but would really prefer someone who 
> knows postfix step in and help out here. 
>
> Ideas and observations: 
> Ram-disk for the queues? (Yes we can allocate more ram to the instance) 
>
> We seem to have a high deferred queue, do we need to clean out bad 
> addresses? Perhaps increase the delay time, or spin off the deferred 
> queue to another "graveyard" server? 
>
> Is apache being hammered by bots scanning the archives? 
>
> Are there bot like things trying to subscribe, I see some odd @wp.pl 
> addresses in the apache logs, trying to hit many list in a few seconds 
> and then rotating the username. 
>
> Are we using a local DNS cache? 
>
> http://www.postfix.org/QSHAPE_README.html#deferred_queue 
> http://www.postfix.org/postconf.5.html#queue_run_delay 
>
> Who's up for the challenge? 
>
> Thanks, 
> Alex 
>
> PS: I'll turn QGIS and Projects back on in a few hours. Hopefully this 
> can be tuned before that. Adhoc will likely stay off for the weekend. 
> _______________________________________________ 
> Sac mailing list 
> Sac at lists.osgeo.org 
> http://lists.osgeo.org/mailman/listinfo/sac