Bug 474609

Summary:	/usr/bin/plasmashell --no-respawn causes severe lagginess by reclaiming enormous amounts of virtual ram
Product:	[Plasma] plasmashell	Reporter:	Jay Ambee <jmbarkei>
Component:	generic-performance	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	major	CC:	goffi, nate
Priority:	NOR
Version First Reported In:	5.27.8
Target Milestone:	1.0
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Jay Ambee 2023-09-17 11:38:48 UTC

SUMMARY

Since I updated to Plasma 5.27.8, the /usr/bin/palsmashell --no-respawn claims a huge amount of RAM (up to 2/3rd of system RAM

Background: I have a 32 GB Ram amd G5700 System. I'm working (at this time) mostly with Obsidian.md, which, as an Electron-App itself uses lots of ressources (unfortunately). But since installing KDE Plasma 5.27.8 I experience an immense lagginess. I first thought, that this was a problem with Obsidian.md, but than I noticed, that the RAM usage stays the same even without Obsidian running. This persists and gets even worse after standby (it acutally stands - without little temporal changes - at 20.2 GB.

Only way to fix it (temporarily): restart system.

htop reports
10.7G VIRT, 833M RES, 290MSHR for plasmashell -- no-respawn (about 30 processes)
5329MB VIRT, 71936M RES, 55040 SHR for QtWebEngineProcess (about 10 processes)

KDE Systemmonitor reads about 630 MiB RAM usage for plasmashell ...

I don't understand what's going on here, I'm not a IT-Systemsengineer, but this does not seem right!

STEPS TO REPRODUCE
1. work with some heavy load productive systems
2. Go to standby mode
3. reactivate system ...

OBSERVED RESULT

severe lagginess of productive programs

EXPECTED RESULT

Swift working of the system, as it was until 5.27.7 ...

SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux: 6.5.3-1-default
(available in About System)
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.110.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION
By the way: why is it necessary, that the calendar reminder of Akonadi constantly uses more than 930 MiB of Ram in idle ???

Comment 1 Nate Graham 2025-01-15 19:06:42 UTC

Sorry we were not able to get to this yet. Is it still happening in a recent version of Plasma, like 6.2.5 or later?

Comment 2 Bug Janitor Service 2025-01-30 03:47:20 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!

Comment 3 Bug Janitor Service 2025-02-14 03:46:49 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.