SUMMARY Setting a custom update interval in the applications and process tables appears to have no effect whatsoever on the download, upload, read and write columns. While CPU and memory are updated according to the user's set preference, the other columns appear to still use the default value (0.5s). As the high update rate is the main cause behind System Monitor's excessive CPU usage (see bug 434877), the impossibility to lower the update rate makes it effectively impossible to lower resource usage without compromising functionality. STEPS TO REPRODUCE 1. Set the update interval in the "applications" section of the home screen to 2 seconds OBSERVED RESULT The download, upload, read and write columns keep on updating every half second. EXPECTED RESULT All the columns are updated according to settings. SOFTWARE/OS VERSIONS Linux: KDE neon KDE Plasma Version: 5.27.6 KDE Frameworks Version: 5.107.0 Qt Version: 5.15.10 ADDITIONAL INFORMATION This seems to be a bug which was also present in KSysGuard, as evidenced by bug 432212; as that software is not maintained any more, I am opening a new bug here.
I can reproduce that changing the minimum time between updates on those table types doesn't seem to successfully avoid updates for that amount of time (I tested with 10 seconds, and the tables were still updating what seemed like every 1-2 seconds). This might be related to https://bugs.kde.org/show_bug.cgi?id=494019 ? Thanks!