Re: profiling a milter (dkim in particular)

15 msg	Header for message size?
3 msg	address rewriting
2 msg	address_verify_relayhost and relay_domains
5 msg	pflogsumm reports
11 msg	Changing Queue IDs
3 msg	another authentication failure( with sasl)
2 msg	Bypass Spam checks for certain destinations
11 msg	Postfix 'too nice' with content_filter

profiling a milter (dkim in particular)
\ Vivek Khera (19 Sep 2007)
. \ (Wietse Venema) (19 Sep 2007)
. . \ Vivek Khera (20 Sep 2007)
. . . \ (Wietse Venema) (20 Sep 2007)
. . . . \ Victor Duchovni (20 Sep 2007)
. \ Mark Martinec (19 Sep 2007)
. . \ Vivek Khera (20 Sep 2007)

7 msg	spammers tacking on headers how to block?
7 msg	[Fwd: Re: RFC 821]
1 msg	Re:
4 msg	(No Subject)
2 msg	RFC 821
7 msg	Suspending mail delievery to a specific user
2 msg	Re: OT - massive newsletter
12 msg	List management issue: possibly Off Topic
2 msg	bad protocol error Testing SASL configuration
2 msg	warning: smtpd_sasl_auth_enable is true, but SA...
1 msg	Quota Problem

Subject:	Re: profiling a milter (dkim in particular)
Group:	Postfix-users
From:	Victor Duchovni
Date:	20 Sep 2007

On Thu, Sep 20, 2007 at 11:11:47AM -0400, Wietse Venema wrote:

> Another option is to data-mine the maillog file (one-second
> resolution). Most of the deliveries should be in there. FreeBSD
> uses connectionless syslog() so records may be dropped when
> Postfix is going full blast.

Depends on the disk, with a battery RAID controller, syslog-ng was able to
report ~2400 deliveries per second on an Opteron system with controller
mirrored SCSI disks, without losing a single log event. This was a test
rig with the mail spool on RAMdisk. Most systems won't get too far past
a few hundred messages per second, so generally, I would expect syslogd
to keep up, unless syslog data and the mail queue are on the same disk,
and it is really stressed.

--
Viktor.

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