Paolo, > been running 2.3.3 for a while here, with DNS tests enabled. > Since the release of the system in production is getting closer, I've > started checking processing times and system load. > > While the system runs unloaded (no swapping) with 10 concurrent > amavisd-new process (ClamAV+SA with DNS tests), in the last days it > takes more than 15 seconds to process a message. There's been an > increase of about 70-80% in processing times in the last couple of > weeks. Without DNS tests messages pass through in less than 0.4s.
15 seconds is on a high side, it would be worth investigating which SA component contributes most - follow Gary's suggestions. Could be a poorly performing local DNS resolver, or some broken RBL list (to be disabled by setting its score to 0) or Razor server. A general remark though: amavisd-new + SA is a multiprogramming environment. Usually our goal is high mail throughput, not low latency. Just waiting for some DNS replies does not hurt by itself - while waiting for replies, other processes can burn useful CPU cycles, one just needs to adjust the number of child processes if this is a regular issue. Mark ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ AMaViS-user mailing list AMaViS-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amavis-user AMaViS-FAQ:http://www.amavis.org/amavis-faq.php3 AMaViS-HowTos:http://www.amavis.org/howto/
