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Mon, 6 Mar 1995 19:17:22 +0100 |
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Message of Thu, 2 Mar 1995 19:14:06 -0500 from LISTSERV
give-and-take forum < [log in to unmask]> |
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> I have a question on another topic that we are trying to solve. I
>wonder if anyone could give me a quick tutorial on how listserv handles
>memeory. That is to say, does listserv require a specific amount of
>'real memory' or can listserv (1.8a running on Unix IRIX 5.2) make use
>of swapping on disk. The reason I ask is because Listserv seemed to
>freeze about 1:30 pm today and spooled incoming mail for a few hours. At
>first we thought it may have crashed, but it did not. (...) Another
>related question. It seems to me that when listserv processes a request
>locally, once listserv hands over the job to sendmail for local
>distribution, listserv has nothing more to do with those specific job
>requests, is that correct? One system administrator here told me that
>listserv was slow or froze because our main node was down so mail was
>queued and re-processed every 15 minutes.
LISTSERV can be swapped out like any normal process. Most of the time
LISTSERV slowdowns are caused by sendmail slowdowns. LISTSERV has to
deliver the outgoing mail to sendmail and if for any reason sendmail gets
slow, LISTSERV gets slow as well. In your case the problem is that you
are running an old version of sendmail. Prior to 8.6, sendmail took about
2-3 seconds per recipient just to add the message to the queue. So you
should be sure to run sendmail 8.6, and to get 8.6.10 to fix the
umpteenth security hole letting anyone gain root access on your machine
(why sendmail needs to run as root other than for local delivery is
beyond my understanding).
Eric
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