Re: Postfix using all CPU after nightly mail submission

Zach Sheppard: > I did as you suggested and opened a console on the VMWare host, did a tail > of the mail log, and it sent mail for a good 5-10 minutes before finally > becoming unresponsive. I tried to Ctrl-C out of tail, nothing. I've done Thanks for confirming that the ENTIRE SYSTEM LOCKS UP.

Re: Postfix using all CPU after nightly mail submission

Was seeing similar behaviour under high tcp load in other applications (unrelated to postfix). It’s possible you’re running into this bug. Try to Set vmxnet3.rev.30=FALSE under the VMs properties and reboot More info here:191201 – Randomly freezes due to VMXNET3  | | | 191201 – Randomly

RE: Postfix using all CPU after nightly mail submission

, Server Systems 860-486-9075 From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Zach Sheppard Sent: Wednesday, February 21, 2018 8:31 AM To: Postfix users <postfix-users@postfix.org> Subject: Re: Postfix using all CPU after nightly mail submission Hi Wiet

Re: Postfix using all CPU after nightly mail submission

Hi Wietse, I limited my postfix installation to default_process_limit 5, 4, 3, 2, and even 1, and still saw the same effects. I am thinking it might be either my opendkim milter (which applies the DKIM signature for each mail) or SASL as these are the only other processes on the server. Are you

Re: Postfix using all CPU after nightly mail submission

Hi Viktor: I configured that internally generated mail to be filtered through our DKIM milter. This was to allow deliveries of error messages from the server to my inbox. However, I see above how this is not ideal since that can just be delivered to the root user inbox. I have turned off that

Re: Postfix using all CPU after nightly mail submission

> > Jan 15 00:42:42 mailrelay postfix/qmgr[5601]: 8EF0980973: > > from=<...@oconee.k12.sc.us>, size=2408, nrcpt=1 (queue > >

Re: Postfix using all CPU after nightly mail submission

Zach Sheppard: > Wietse: > > I have not made any changes to rsyslog.conf. All it does it redirect all > mail log messages to one log in /var/log/mail which I rotate with a cron > script nightly. However, I do agree that it really could be the only other > process that could be hanging the server.

Re: Postfix using all CPU after nightly mail submission

On Fri, Jan 19, 2018 at 02:04:05PM -0500, Zach Sheppard wrote: > I have not made any changes to rsyslog.conf. All it does it redirect all > mail log messages to one log in /var/log/mail which I rotate with a cron > script nightly. However, I do agree that it really could be the only other >

Re: Postfix using all CPU after nightly mail submission

Wietse: I have not made any changes to rsyslog.conf. All it does it redirect all mail log messages to one log in /var/log/mail which I rotate with a cron script nightly. However, I do agree that it really could be the only other process that could be hanging the server. I'm not able to determine

Re: Postfix using all CPU after nightly mail submission

Zach Sheppard: > However, whenever Postfix gets a large e-mail load it processes the e-mails > for around 30-45 minutes and then consistently uses around 70-80% of the > CPU effectively locking up the entire system so much so that I can't even > login and debug without either disabling the network

Re: Postfix using all CPU after nightly mail submission

On 19 January 2018 at 16:02, Viktor Dukhovni wrote: > > >> On Jan 19, 2018, at 10:58 AM, Dominic Raferd wrote: >> >>> The pipes to "sort" should not be needed. The output of "postconf" is >>> pre-sorted. >> >> yes I thought that - but

Re: Postfix using all CPU after nightly mail submission

> On Jan 19, 2018, at 10:58 AM, Dominic Raferd wrote: > >> The pipes to "sort" should not be needed. The output of "postconf" is >> pre-sorted. > > yes I thought that - but without piping through sort I see: > $ comm -1 -2 <(postconf -n) <(postconf -d) > comm: file

Re: Postfix using all CPU after nightly mail submission

On 19 January 2018 at 15:55, Viktor Dukhovni wrote: > > >> On Jan 19, 2018, at 10:46 AM, Dominic Raferd wrote: >> >> Here's a way to check for explicit settings in main.cf that are >> actually defaults and so could be removed (works under

Re: Postfix using all CPU after nightly mail submission

> On Jan 19, 2018, at 10:46 AM, Dominic Raferd wrote: > > Here's a way to check for explicit settings in main.cf that are > actually defaults and so could be removed (works under bash): > > comm -1 -2 <(postconf -n|sort) <(postconf -d|sort) The pipes to "sort" should

Re: Postfix using all CPU after nightly mail submission

On 19 January 2018 at 15:21, Viktor Dukhovni wrote: > > > > > default_destination_concurrency_limit = 50 > > This is the default, remove the setting. > > ... Here's a way to check for explicit settings in main.cf that are actually defaults and so could be removed

Re: Postfix using all CPU after nightly mail submission

> On Jan 19, 2018, at 9:55 AM, Zach Sheppard > wrote: > > bounce_queue_lifetime = 0 This is a bad idea. Don't do that. Allow transient delivery failures to be retried. > default_destination_concurrency_limit = 50 This is the default, remove the setting. >

Re: Postfix using all CPU after nightly mail submission

> On Jan 19, 2018, at 8:52 AM, Zach Sheppard > wrote: > > Jan 15 00:42:42 mailrelay postfix/qmgr[5601]: 8EF0980973: > from=<...@oconee.k12.sc.us>, size=2408, nrcpt=1 (queue >

Re: Postfix using all CPU after nightly mail submission

Hi Bastian, I did read that debug readme and saw the following: >> If you can't use a test email address, please anonymize email addresses and host names consistently. Replace each letter by "A", each digit by "D" so that the helpers can still recognize syntactical errors. ...and is why I

Re: Postfix using all CPU after nightly mail submission

On Fri, 19 Jan 2018, Bastian Blank wrote: Date: Fri, 19 Jan 2018 22:06:15 From: Bastian Blank <bastian+postfix-users=postfix@waldi.eu.org> To: postfix-users@postfix.org Subject: Re: Postfix using all CPU after nightly mail submission On Fri, Jan 19, 2018 at 08:52:39AM -0500, Zach Sh

Re: Postfix using all CPU after nightly mail submission

On Fri, Jan 19, 2018 at 08:52:39AM -0500, Zach Sheppard wrote: > I see no errors or alarms in the mail log nor syslog. The only odd message > I see is a series of ^@ symbols before the system freezes: Please read http://www.postfix.org/DEBUG_README.html#mail about how to report problems. > Jan