[Mailman-Developers] VERPing: ouch!
Fil
fil at rezo.net
Tue Jul 13 17:22:26 CEST 2004
> > But more importantly, the Mailman -> postfix thing took 5 hours
> > instead of ~ 15 minutes.
>
> What system metrics spiked during this time?
None!
> 160K/5 hours is a delivery rate of less than 600 per minute. That's one
> message every 10+ seconds which is quite slow. Even if you double that
> (receipt and transmission) that's only 1,200 per minute which is still
> dawdling territory. Your MTA should have been able to keep that spool
> empty while twiddling its thumbs.
Yes, the MTA *was* twiddling its thumbs, and the system too... and as
Mailman's daemon was sending one VERP msg at a time, it was not processing
the usual incoming stuff, and not delivering the other lists. I got a nice
spike at the end of the 5 hour period, when all the msgs that were kept
waiting suddenly jumped in :-)
-- Fil
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