Thanks!
I find more detail about loadavg here:
http://www.loadavg.com/2012/01/procloadavg/
I think deliver_queue_load_max here mean the first number:
root@mail:/etc/exim4/conf.d/main# cat /proc/loadavg
2620.41 1627.96 962.37 1504/13290 4940
root@mail:/etc/exim4/conf.d/main# cat /proc/loadavg
2620.41 1627.96 962.37 247/13354 5200
On Mon, Aug 19, 2013 at 5:21 PM, Heiko Schlittermann <hs@???>wrote:
> Hi,
>
> boyd yang <boyd.yang@???> (Mo 19 Aug 2013 10:51:41 CEST):
> > Hi,
> >
> > What's the diffference between deliver_queue_load_max and queue_run_max?
> > Are they the same?
> > How can I know the "system load average"?
> >
> > Below are definition I got from exim spec:
> >
> http://www.exim.org/exim-html-current/doc/html/spec_html/ch-main_configuration.html
> >
> > deliver_queue_load_max Use: main Type: fixed-point Default: unset
> >
> > When this option is set, a queue run is abandoned if the system load
> > average becomes greater than the value of the option. The option has no
> > effect on ancient operating systems on which Exim cannot determine the
> load
> > average. See also queue_only_load and smtp_load_reserve.
>
> As your system load (see /proc/loadavg on Linus systems), or uptime(8))
> may be a critical parameter, and as queue processing uses system
> resources, Exim can stop the queue processing if your system load
> reaches a critical level. This doesn't prevent Exim from accepting
> messages and starting a first(!) delivery attempt.
>
>
> > queue_run_max Use: main Type: integer Default: 5
> > This controls the maximum number of queue runner processes that an Exim
> > daemon can run simultaneously.
>
> -> as written: the maximum number of parallel running Exims processing
> the current mail queue. This number is independend on the load of your
> system. As each process locks one message, it's the maximum number of
> of messages delivered at the same time. (Not the maximum number of
> deliveries, as each message may have several recipients, which Exim may
> deliver to in parallel.)
>
> It's what I understand from the spec.
>
> --
> Heiko
>
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