Thanks Dianne! Our server has 16GB of ram and we have a 2GB RAMDISK setup for md.
In the multiplexor man page, I saw this quote: "Using the -R option has the side-effect of permitting new connections from the loopback address to queue." Does this mean you can have loopback connections queue and non-loopback connections get a standard busy warning if the max processes are used up? Regarding your comment about the downside is that it would "Hold open more connections and use more milter threads." I wasn't quite sure what you meant by "using more milter threads"? Do you mean that it will just use MX_MAXIMUM mimedefang.pl processes for longer? ie, until the traffic spike is fully processed? > > > 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 [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
