http://bugzilla.opensuse.org/show_bug.cgi?id=1182982 http://bugzilla.opensuse.org/show_bug.cgi?id=1182982#c8 --- Comment #8 from Richard Weinberger <richard@nod.at> --- (In reply to Richard Weinberger from comment #7)

(In reply to Fabian Vogt from comment #6)

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(In reply to Fabian Vogt from comment #5)

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(In reply to Richard Weinberger from comment #4)

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But the process consumes 100% CPU all the time. Also when noting is logged (which is most the time the case).

Additionally I run "perf top" on the imap resource process at the point where it consumed 100% CPU: 96.95% libQt5Core.so.5.12.7 [.] QMetaObjectPrivate::disconnectHelper

Now that's actually interesting. It shows that the process isn't busy processing mail data, but with handling disconnections. This reminds me very much of https://bugreports.qt.io/browse/QTBUG-72649.

Looking at the akonadi code, it's prone to run into the pretty much worst case of this: https://github.com/KDE/akonadi/blob/3bbbdfb368e36b3866a9b58e282120a65e1074a9... src/core/connection.cpp#L247

If this is the case, it also explains why so far we weren't able to reproduce this issue: It becomes worse the longer the process is running and the more requests it receives.

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1.39% libQt5Core.so.5.12.7 [.] QMetaObject::activate

Please try libKF5AkonadiCore5 from https://build.opensuse.org/package/show/home:Vogtinator:boo1182982/akonadi- server.openSUSE_Leap_15.2_Update once it's built. It contains a workaround for this specific case.

Looks *much* better. Akonadi consumes almost no CPU, also not when syncing my mailbox. So far everything seems to run smoothly again. :-) Tomorrow when kmail is heavy used due to dayjob, we'll definitive see whether your workaround did it.

The workaround seems to help. Thanks everyone! -- You are receiving this mail because: You are on the CC list for the bug.