Martin wrote: >when activating policyd in main.cf users which send a lot of mails >(newsletters) to our mailserver, have to wait a long time the mails >will send by her client (f.e. outlook). >Sometimes the client gives a timeout. The mails were send via BCC header. > >Send few mails will be fast. ># telnet MAILSERVER 25 is very fast > >Sending may 100 mails (100 recipients per BCC) will be slow (ca >5minutes to send with outlook). >200 mails round about 9 minutes >500 mails over 15 minutes >You can see our mail.log (delay)
You are exhibiting something not too dissimilar to what I've seen on my setup. For performance testing, I copied a query from the verbose cluebringer log, and then used a short bash script to squirt lots of queries in using netcat. IIRC I could achieve a sustained rate of something like 60 q/s without any problem. Originally I had some errors in the postfix logs (using Postfix Admin) : >warning: mysql query failed: MySQL server has gone away >fatal: >mysql:/etc/postfix/sql/mysql_relay_domains_maps.cf(0,lock|fold_fix): >table lookup problem These killed throughput, but went away when I upgraded the backend to Debian Etch which includes upgrading MySQL from 5.0 to 5.1. In the end, I determined that Postfix itself seems to throttle policy server queries to about 2 per second for each process/thread. Thus if I set my list server to use a single connection, it takes about 25s/message (it send emails to 50 recipients max/message) - but if I use multiple connections and connect to multiple servers (I have a little cluster of 3) then the rate scales linearly. Since I got to a rate I was happy with then I didn't look any further. I have the recipient limit set to 50 on my servers, we don't get many complaints, and people are generally happy to use our Mailman server if they want to run a mailing list. It makes it easier for them since recipients can subscribe/unsubscribe themselves - so less admin hassle. -- Simon Hobson Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed author Gladys Hobson. Novels - poetry - short stories - ideal as Christmas stocking fillers. Some available as e-books. _______________________________________________ Users mailing list [email protected] http://lists.policyd.org/mailman/listinfo/users
