Nataraj wrote:
Hi,
I would appreciate any suggestions anyone can offer on the following
problem that I'm having with postfix...
I'm running postfix+pgsql-2.3.3-2.1.el5_2 on a CentOS 5.4 server. I
see what looks likes a server in stress mode as described in
http://www.postfix.org/STRESS_README.html except the odd think about
it is that the server is not heavily loaded and I sure can't see where
it's exceeding any process limits. What's even odder is it doesn't
appear that the stress code is implemented in this version.
If I telnet to port 25 I get an immediate SMTP greeting followed in 10
seconds by
421 4.4.2 mymail.com Error: timeout exceeded
and the connection being closed.
The following maillog entry is logged:
May 3 16:44:06 mymail postfix/smtpd[22573]: timeout after CONNECT from
173-12-149-200.client.myisp.com[173.12.149.200]
This is like this constantly. I see 0-4 smtpd processes on the server
at any one time (I'm not sure if it's limited at 4, I just haven't
seen more). There are a similar number of policy daemons. There is a
"-" in the maxproc field for smtpd in master.cf. From everything I
can tell the default is a limit of 100. I do run a policy daemon
(vpostmaster). I've changed its maxproc field to 0 per the
recommendation in the STRESS_README (and restarted postfix). It's
master.cf entry looks like this...
vpm-pfpolicy unix - n n - 0 spawn
user=vpostmaster argv=/usr/lib/vpostmaster/postfix/vpm-pfpolicy
I also get lots of log entries like this for timeouts on the policy
daemon:
May 2 05:36:20 aspen postfix/spawn[6003]: warning:
/usr/lib/vpostmaster/postfix/vpm-pfpolicy: process id 6004: command
time limit exceeded
This problem is solved. The problem was caused when my hosted VM was
migrated from a VMware 3.5 to a VMware 4 server and the vmware config
for my VM had the OS configured to Ubuntu instead of redhat. Well in
vmware ESXI 4.0 it appears that they are more clever about how the
clocking interfaces with options that are set in the kernel (Centos 5.4
does not use a TICKLESS kernel, but current UBUNTU releases do). After
the vmware config was changed my mail server problems disappeared.
Thank you,
nataraj
