Version: 2.0.89 (using Devel) OS: Linux When Akonadi is synchronising its IMAP folders, KMail / Kontact's CPU usage goes to 100% and it becomes sluggish. It doesn't reach unresponsiveness state, but it's slow enough reacting to user interaction that it's unusable. This is being run on a Quad-Core Core-i7 @ 2.67 GHz, 2 threads per core. It's not a limit of the system, since most other CPUs are idling -- just one is at 100% usage, by the kmail / kontact process. Depending on the number of folders and the connection speed, the period under which KMail is unusable can be quite long. And if the connection speed is high, the level of usability decreases (that is, KMail is doing more work and reacting less to user interaction). In my case, I had one IMAP server with 50+ folders at a 5-minute check interval. That means KMail would be completely unusable about 1 every 5 minutes. Reproducible: Always OS: Linux (i686) release 2.6.36.2-server-1mnb Compiler: gcc
adding as a showstopper
I can confirm that exactly. (OpenSUSE 11.4) There are lots of reports like that. It looks like this is REALLY a problem. Who can fix that?
same here, kde 4.6.4, archlinux, atom cpu. mysqld and akonadi_resource produce high cpu load (up to 80%)
Same on my notebook running KDEPIM 4.7. Akonadi is using 100% CPU (both cores) on synchronizing my disconnected IMAP resource
Maybe related to http://blogs.kde.org/node/4457
Same here, I really hope this gets fixed ASAP, as it's a showstopper. KDE 4.7.0 Arch Linux
4.7.1 syncing Gmail,14k emails, multicore processor, Nepomuk enabled, for over an hour now, disabled interval Ouput of top 17385 bart 20 0 228m 29m 6676 S 151 0.8 25:07.96 akonadiserver 17393 bart 20 0 296m 23m 18m S 9 0.6 0:52.77 akonadi_maildis 17043 root 20 0 415m 159m 95m S 8 4.0 3:44.67 Xorg Very much IO-activity. While writing that stops but Akonadi still consumes 88%
Dear Thiago, thank your for reporting the bug. Also thank you to anyone who confirmed it. The bug is related to an ancient version of both KMail and (thus) Akonadi which still use Nepomuk. As I do not see any such issues anymore even with a huge IMAP account and as I do not see any confirmation of it with KMail from KDEPIM 4.14 I am thus closing this bug as resolved/unmaintained. If you still see this issue with KMail from KDEPIM 4.14 and Akonadi 1.13 please comment and reopen the bug. If you can´t reopen it, tell me, and I will do it. Please in that case, if you can try with latest KDEPIM 4.14 and Akonadi 1.13 compiled from the respective git branches. At least for Akonadi 1.13 as it received notable MySQL related performance fixes recently. Thanks, Martin