Nikolaos Milas:
> Hi,
>
> I am running CentOS 5.8 with postfix-2.9.1-1.pcre.sasl2.dovecot.rhel5 (a
> build based on Simon J. Mudd's SRPM) using LTB openldap server
> (openldap-ltb-2.4.31-1.el5) to host user accounts / aliases.
>
> The setup has been working fine for many months.
>
> Today, after a user sent (on 14:53:39) a mass mail (through a group
> alias, implemented using ldap dynlist), Postfix stalled and the server
> (a VM under KVM) became overloaded. I noticed that openldap was using
> all the cpu.
>
> I can't tell if the primary cause was Postfix or OpenLDAP.
I think the primary cause was the system running out of memory or
some other resource. I suggest that you reduce the Postfix
default_process_limit until you can get a more powerful machine.
The default limit is 100. Try 25 to start with.
Wietse
Lots of pipe(8) errors with
> Sep 28 15:10:19 vmail postfix/pipe[2874]: warning: pipe_command_read:
> read time limit exceeded
Other errors with services failing:
> delay=2366, delays=18/0.22/0/2348, dsn=4.3.0, status=deferred (bounce or
> trace service failure)
> Sep 28 15:32:45 vmail postfix/pipe[2881]: warning: 55BDE6E65D9: defer
> service failure
> Sep 28 15:32:45 vmail postfix/pipe[2895]: warning: 55BDE6E65D9: defer
> service failure
