Last time I had this issue it turned out GFS2 was the culprit.
http://www.postfix.org/QSHAPE_README.html
Regards Durga Prasad +919849111010
-----Original Message----- From: dovecot [mailto:dovecot-bounces@dovecot.org] On Behalf Of Håkon Alstadheim Sent: 16 November 2018 04:05 To: dovecot@dovecot.org Subject: Re: Mail slowed down to a crawl...
Den 15.11.2018 21:00, skrev StarionTech (IMAP):
Been moving along just fine for a couple years now, then in the last two days, email has slowed to a crawl.
Retrieving email via IMAP is very slow, progress bar in the mail client shows that it is downloading messages almost constantly, like it never closes the connection, or it’s getting the messages very slowly. The server that dovecot/postfix is on has also bogged down to a crawl.
The postfix queue is sitting with hundreds of queued up good customer email.
It’s almost acting like dovecot is not getting the messages from postfix, or they’re being delayed for some reason.
How to approach fixing this?
Check server logs for errors. Both dovecot and postfix struggling suggest some common underlying cause.
Do measurements on Cpu, disk, cpu-wait. Which process is hogging the server ? Spam-ass acting up? Drives filling up?
Gut instinct says one or more of your drives are failing, or you have file or file-system corruption, so if you are not running smartd, first priority is installing smartd/smartmontools and see what falls out.
This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus