On Sun, Jan 31, 1999 at 03:35:26PM -0500, David Villeger wrote:
>
> My questions:
>
> - event though the concurrencyremote is set to 120, the number of
> qmail-remote never gets higher than 40. If some other program runs at the
> same time (like a bouncer handler, or a mail generator), the number of
> qmail-remote drops to 5! What should I increase to bump it up? (memory,
> cpu,...)?
>
You need to do a few more tests, but the culprit is generally disk
io.
before a batch of mail injections, run:
iostat 1 >> /tmp/io.tmp
And see the amount of time spend in cpu wait.
Hmmm.. the solaris "top" will also report this if you're running it
during the "slowdown" period.
> - The todo and intd directories get very big under high load. On one
> machine, I've seen it reach 1.5 megs (just the directory file, not the
> content of the directory). How does this impact performance?
Slows it down. :)
Some things to try:
1) Buy a -new- scsi hdd for the exclusive use of the /var/qmail/queue
You want one of the latest, fastest, cool running, fast seeking
things from Seagate. The 4GB size (smallest you can find) will
run $500 for the 10k rpm Cheetahs and $400 for the 7.2k rpm Barracudas.
2) Upgrade the OS to Solaris 7, which comes with Sun's version of a
journaling file system, ufs logging.
--
John White
[EMAIL PROTECTED]
PGP Public Key: http://www.triceratops.com/john/public-key.pgp
