Re: Please explain -qq

On 2025/12/15 1:01 PM, Rich via Exim-users wrote:
 > >  > Are all of the batch dumped in by your CRM sitting undelivered?
 > >  > Or some proportion delivered and some stuck?
 > >  > Or nearly all delivered and only a few stuck?
 > >
 > > I could see them on mailq.

 > Yes, but how many of them?

well, most of them: about 21.6k - after the 400 or so that did get 
delivered.

> While your choice of system load limit is up to you, 12 feels low.
The VM only has 2 cores; the drives are SSD, the fs is ext4. I could 
consider throwing more resources at it, but it didn't seem to be working 
that hard before - I'll do more monitoring now.

The bit I couldn't fathom was the load being high while no deliveries 
occurring. Hence my thought that the routing phase might be chewing up 
resources; or that I was simply starting too many runners [for 2 cpus].


> You could experiment with the "-oY" cmdline option in combination with 
> "-qq"; it will disable some of those possibilities (at the cost of fast
 > ramp-up of queue runners, so you'd want to keep that 10s period.  For
 > the normal case with -qq you don't need such a short period in most
 > cases).

I'll leave -oY for later, and try the more basic changes first.


> I do hope you're running a local caching resolver.

I am now, thanks ;-)

> it might be worth experimenting with split-spool.

I'm already using that, thanks.


FYI: today's 22k mailing. 13k emails sent within 1 minute of being 
queued and 98.5% emails sent within 20 mins of being queued (pretty 
good); no abandoned runners due to load. This used:

    Queue option: -q1m
    deliver_queue_load_max = 20
    queue_run_max = 35

I've configured now with

    Queue option: -qq5m
    deliver_queue_load_max = 20 (same)
    queue_run_max = 5

I'll see how tomorrow's mailing goes.

Thanks,


--
Rich

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