Service unavailable, lots of idle dovecot-login processes

[@lbutlr]

On 02 Feb 2021, at 05:59, Wolfgang <adminkram at tripelspark.de> wrote:
> hen listing TCP connections via lsof, there are only around 30
> connections open to IMAP and we have exactly the same amount of
> dovecot/imap processes. These connections are held by 30
> dovecot/imap-login processes.
> 
> The other 70 dovecot/imap-login processes seem to do nothing. They're
> all sitting in "epoll_wait(14," according to strace but don't have TCP
> connections open.

Have you tried reducing the number from 100 to, say, 30?

But as Aki said, doveconf -n is crucial, especially since you upgraded from an older version.

-- 
I draw the line at 7 unreturned phone calls.