Hi, I've just tried upgrading from 1.1.8 to 1.2.2. As soon as the new version was started up the number of imap/pop3 processes began to climb to 800+, where I normally have about 300 or so connections at any given time. The load on the server also climbed to 150+. I've reverted back to 1.1.18, which is running just fine, but is there anything I can do to help trace what was causing the problem? Unfortunately I don't have a clue where to start. Thanks Guy -- Don't just do something...sit there!
> I've just tried upgrading from 1.1.8 to 1.2.2. As soon as the new > version was started up the number of imap/pop3 processes began to > climb to 800+, where I normally have about 300 or so connections at > any given time. The load on the server also climbed to 150+. > > I've reverted back to 1.1.18, which is running just fine, but is there > anything I can do to help trace what was causing the problem? > Unfortunately I don't have a clue where to start.Hello, could you please give us more information about your machine : - OS - kernel - the output of "dovecot --build-options" I'm thinking about a regression in the kernel's inotify API that led me to the same symptoms. Regards. -- Guillaume Plessis -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 2417 bytes Desc: not available URL: <http://dovecot.org/pipermail/dovecot/attachments/20090727/0b1e58ea/attachment-0002.bin>
>> - kernel > root at stoat:/# uname -a > Linux stoat.aluminati.org 2.6.24-23-server #1 SMP Mon Jan 26 01:36:05 > UTC 2009 x86_64 GNU/Linux > >> - the output of "dovecot --build-options" > This is from the current 1.1.18 install, but 1.2 was compiled with the > same configuration options, so they should be the same? > root at stoat:/# dovecot --build-options > Build options: ioloop=epoll notify=inotify ipv6 openssl > Mail storages: maildir > SQL drivers: mysql > Passdb: checkpassword passwd passwd-file shadow sql > Userdb: nss passwd passwd-file prefetch sql staticStrange... You could try to upgrade your kernel. I had some trouble with <=2.6.28 and the inotify API http://lkml.org/lkml/2008/12/15/83 Regards -- Guillaume Plessis -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 2417 bytes Desc: not available URL: <http://dovecot.org/pipermail/dovecot/attachments/20090727/7092ceb4/attachment-0002.bin>
On Mon, 2009-07-27 at 12:14 +0100, Guy wrote:> I've just tried upgrading from 1.1.8 to 1.2.2. As soon as the new > version was started up the number of imap/pop3 processes began to > climb to 800+, where I normally have about 300 or so connections at > any given time. The load on the server also climbed to 150+. > > I've reverted back to 1.1.18, which is running just fine, but is there > anything I can do to help trace what was causing the problem? > Unfortunately I don't have a clue where to start.Besides the OS/Kernel version that Guillaume already asked, what did you see in Dovecot's logs? Any errors? Anything different in disconnect reasons? Also dovecot -n output could show something useful. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 197 bytes Desc: This is a digitally signed message part URL: <http://dovecot.org/pipermail/dovecot/attachments/20090727/aca84293/attachment-0002.bin>