On Mon, Mar 27, 2000 at 11:25:34AM -0600, Greg Moeller wrote:
> > You need to tell us additional facts about the server that are relevant to the
>question.
> >
> > Eg, Is /var/qmail/queue on a separate partition?
> Yes, it is.
> /dev/dsk/c2t5d1s6 8404669 5654879 2665744 68% /var/qmail
Hmm. 2Gig of /var/qmail, that seems quite large, even for 3,000 queue entries. Btw,
3000 queue entries is not necessarily a problem. That's about 100K per mail message,
which is very large indeed. Is there something else significant on that partition?
> /dev/dsk/c2t5d0s6 43080643 21556631 21093206 51% /mailhome
>
> >
> > What are the iostats like on each of the spindles?
> # iostat 10
> tty sd0 sd6 sd20 sd65 cpu
> tin tout kps tps serv kps tps serv kps tps serv kps tps serv us sy wt id
> 0 24 182 12 33 0 0 0 2440 302 5 1619 252 2 38 36 22 4
> 0 8 61 5 113 0 0 0 1061 156 30 1894 308 3 40 42 11 7
> 0 8 148 18 24 0 0 0 594 98 9 1512 261 2 47 41 8 4
> 0 8 137 9 28 0 0 0 527 93 6 1528 265 1 49 42 3 6
> 0 8 97 12 21 0 0 0 2529 335 5 2386 397 2 35 47 17 2
> 0 8 31 3 93 0 0 0 1049 160 35 2194 381 2 36 43 10 11
> sd65 is /var/qmail
> df20 is /mailhome
Looks like both disks are getting pummelled into the ground. 200+ tps is a lot!
> > How are you running qmail-smtpd?
> It's running from tcpserver.
> /usr/local/bin/tcpserver -x/etc/smtp.rules.cdb -H -R -c300 -u 60004 -g 65535 0 smtp
>/var/qmail/bin/qmail-smtpd &
> >
> > what are your concurrency settings?
> Local is 50, remote is 100.
So you can have upto 350 processes trying to do i/o to the queue. That seems
high to me. You might want to a separate instance of qmail handling inbound smtp
and outbound smtp. That way you can control the concurrency better.
> > What does qmail-qstat show?
> >
> # /var/qmail/bin/qmail-qstat
> messages in queue: 3602
> messages in queue but not yet preprocessed: 0
That's good. big todo wont do much for you. It may simply be that you're trying to run
too much concurrency for a single spindle. How may of each time of qmail process do you
have?
ps -ef | grep qmail-|awk '{print $9}' | sort | uniq -c | sort -nr
>
> That about covers it. There were 2500 in the queue when I sent the original
> Email (at 10:53, it's now 11:25)
How many were remote and how many were local?
Regards.
