I have noticed that since the Debian stable -> testing upgrade my computer sometimes becomes extremely slow with high disk activity. From KDE I can't fix the problem, eventually everything just stops. I used to switch off the computer to be able to work again. I could not find a reason why this happens or what triggers this behaviour. Recently I have noticed that I can switch to the character console and work there. From the console I have noticed that the plasmashell process use a huge amount of memory. Killing the plasmashell process restored the responsiveness in the graphical interface and the already running applications, so I could finish and save my work and properly close the applications. Reproducible: Sometimes
Created attachment 97226 [details] screenshot showing the problem
I have the same issue on Fedora 23 Plasma 5.7.3 on QT 5.6.1. Plasmashell just uses up more and more memory (as well as CPU to some extent), and gets more and more sluggish over the course of a day or so. For example, clicking on a taskbar button takes a noticeably long time to bring up the clicked application. Restarting it with `kquitapp5 plasmashell && sleep 5 && kstart plasmashell` restores snappy operation.
That screenshot says %mem 1.2 1.2% is not a lot. Do you use nvidia?
I can't speak for OP but a) My mem usage goes a lot higher than 1.2% (on a system with 32 gb). I'll let it collect memory for a while and then post a screenshot. b) I use ATI with the open source radeonsi driver. Rendering backend is OpenGL 2.0.
Created attachment 100944 [details] Plasmashell memory details shown in System Activity After about two days, Plasmashell is using about 2.6GB of memory privately.
Created attachment 100945 [details] Plasmashell System Activity ... and after about two days, Plasmashell is using about 8% of the CPU constantly, even when idle.
Created attachment 100948 [details] Plasmashell glances processes sorted by memory Glances top processes sorted by memory. Plasmashell up to 90.3% CPU, 11.6% memory, 72GB virtual mem usage, 3.65G resident.
Interesting: I haven't had this issue recently, even though Plasmashell and QT are both still the same version as before (5.7.3 and 5.6.1 respectively), and as far as I know I haven't changed any settings at all. Though I have updated a few other components, none of which seem remotely relevant, except *maybe* the following: * kernel (now at 4.7.3) * ibus (now at 1.5.11) * chromium-libs-media (now at 52.0.2743.116-10)
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Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!