On Sat, 26 Aug 2017 22:52:15 -0700 Amit Gupta <amit...@gmail.com> wrote:
> Assume a burst of emails comes in and all 20 md processes are busy > working. > 1) What should the 21st and higher connecting clients > experience? Sendmail will appear to respond more slowly than usual. > 2) Is there a configurable limit to the number of queued > connections? Yep. The "-q" option to mimedefang-multiplexor. See the -q and -Q command-line options in the mimedefang-multiplexor(8) man page. > 3) What's the downside of letting the connections queue > other than holding open more TCP connections? Holding open more connections and using more milter threads. > 4) Any other tips on the settings you use in production? If you actually need to queue requests more than occasionally, you need a more powerful server. The queueing feature is supposed to handle transient bursts of traffic. It isn't meant to squeeze more steady-state performance out of a server. > The reason I'm asking is because we recently had a burst of traffic > that caused the IO on our server to go up to a point where everything > became unresponsive for a couple minutes. We had our MX_MAXIMUM set > to 110. How much RAM did you have? You really, really, really don't want a MIMEDefang scanning server to start swapping. Regards, Dianne. _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list MIMEDefang@lists.roaringpenguin.com http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
