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Re: Everything about Sendmail is Slow



On Sat, 2 Mar 2002, Dave Scott wrote:

> Hi, I got a server with 30 users on it, Mailman with 7 listservs going.
>
>
> Debain 2.2, Kernel 2.2.17, Sendmail 8.9.3-21

8.9.3 is pretty old...  you'd do much better if you can upgrade to
a newer version (pull the source & build on your potato box)

> For some reason, just the past few days, users have complained of
> slowness of up to a few minutes to send out mail.

Sounds like name resolution problems

> If I log in and try to check the mailq, it responds with what is in the
> mailq but only after a minute or two.

This would also indication name resolution problems

> Any ideas on where I should start?

The most likely problems your facing are:
	1) ident timeouts (did your firewall change to drop instead of
	   reject ident packets?

	2) name resolution delays
		* `sendmail -bt -d0.13 </dev/null` will tell you if sendmail
	       is properly resolving all of its internal addresses
		   -- check /etc/hostname, /etc/resolv.conf, /etc/hosts

		* `nslookup <host that seems to take along time to mail to>`
		  will tell you if dns resolution is kosher
		  -- check /etc/hosts, /etc/resolv.conf

		* `runq -v` will show a log of sendmail's processing of the
		  outbound queue, it might provide some usefull information

-- 
Rick Nelson
* HomeySan waits for the papa john's pizza to show up
<ravenos> mm. papa john's.
<HomeySan> hopefully they send the cute delivery driver
<ravenos> they dont have that here.
<Dr_Stein> why? you gonna eat the driver instead?



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