Strange cpu load coming from nowhere (nowhere == zeitgeist-daemon)

asked 2013-01-16 17:11:33 -0500

BlackMoses gravatar image

updated 2014-12-23 12:23:42 -0500

mether gravatar image

UPDATED, SEE BELOW.

I've been experiencing this issue for some time already both on my F17 KDE 4.9.5 notebook and desktop.

Mostly after 12 hours of uptime HDD starts to be used a lot and one core starts to be overloaded resulting in >33% (on my triple-core Phenom) of >50% (on my dual-core Sandy Bridge) CPU usage. I can literally see as UI drawing slows down (when I right-click, I first see shadow of the context menu, then contents).

The CPU load shown by top and KDE's system activity (Ctrl+Esc) monitor are wrong, only System Monitor widget from KDE Plasma and KSysGuard show the right usage. They actually seem to take the data from the same source (kde-workspace/ksysguard, here Git: https://projects.kde.org/projects/kde/kde-workspace/repository/revisions/master/show/ksysguard).

High disk I/O may come from zeitgeist-daemon because it was saving over 200 KiB/s, I'll try to terminate it properly when I next experience this issue.

Here are screenshots:

(large image, right click and select "View image" to enlarge.)

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KSysGuard

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Edit: I discovered that logging out and in fixes the problem. That must be caused by some userspace program.

Edit 2: I'm not a total newbie, so ideas how I should debug it myself will be very helpful.

EDIT 3: Now I'm totally sure it's zeitgeist-daemon thing. I simply killed it and the system became responsive again. The unresponsiveness came from high HDD load (or ineffective I/O) caused by zeitgeist-daemon.

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