For someone looking for a workaround, then the 100% CPU usage could apparently also be a result of TB reopening/reindexing databases too often. According to these links:
https://bugzilla.mozilla.org/show_bug.cgi?id=794401 http://rainbow.chard.org/2013/02/19/thunderbird-high-cpu/ it appears that "Technically ... [Thunderbird] check open DBs every minute, and if they have been open more than 3 seconds and there are no other references to them, they are closed. The '3 seconds' has now been changed to the original intent of 5 minutes." On my system, mail.db_idle.limit was set to 300000, which might have been the intended value... But I've increased it to 30000000 as others have suggested, which seems to help -- I have many really really large IMAP folders, so indexing is a slow process that can last minutes. Whether it has negative impacts elsewhere remains to be seen. But it is an easy tweak and fast to test -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/927515 Title: Thunderbird stuck at 100% CPU Status in Mozilla Thunderbird Mail and News: New Status in The Ubuntu Power Consumption Project: Confirmed Status in “thunderbird” package in Ubuntu: Triaged Bug description: Just received the automatic update last night. Ever since, thunderbird is using 20-50% CPU constantly, according to top. Turned off global search and indexing to no avail. This is really bad for me as it's driving up the temperature of my laptop, runs up the fan noise and reduces battery time. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: thunderbird 10.0+build1-0ubuntu0.11.10.1 ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17 Uname: Linux 3.0.0-16-generic x86_64 ApportVersion: 1.23-0ubuntu4 Architecture: amd64 BuildID: 20120129183038 Date: Mon Feb 6 10:44:55 2012 EcryptfsInUse: Yes ProcEnviron: LANGUAGE=nl_NL:nl:en PATH=(custom, user) LANG=nl_NL.UTF-8 SHELL=/bin/bash Profile0Extensions: extensions.sqlite corrupt or missing Profile0Locales: extensions.sqlite corrupt or missing Profile0Plugins: pluginreg.dat isn't available Profile0Themes: extensions.sqlite corrupt or missing Profiles: Profile0 - LastVersion=3.0.6/20100713193322 (Out of date) Profile1 (Default) - LastVersion=10.0/20120129183038 (Running) SourcePackage: thunderbird UpgradeStatus: Upgraded to oneiric on 2012-02-02 (4 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/927515/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
